Fatal Electric Shock

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The Chief Engineer was sadly killed onboard the Motor Yacht "One More Toy". This is the full breakdown of what happened that fateful day.
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[@SuperYachtCaptain]

The first 100 people to go to www.blinkist.com/syc are going to get unlimited access for 1 week to try it out. You'll also get 25% off if you want the full membership

[@martinwyke]

Comprising not compromising.

[@andywilkinson4910]

Wayne was a good friend and very competent engineer we all miss him here in Palma de Mallorca R I P buddy x

[@genericusername2177]

Sorry for your loss. ♥

[@moose6676]

God bless Wayne 🙏🏻🙏🏻 RIP

[@frequencymanipulator]

Thanks Andy, that was the one thing I missed in the Video (not sure if it was stated actually). Rest In Peace Wayne. Now I know his name, my thoughts go to his family and the people that tried to save him. What a tragic story.

[@TheLDGuy]

Love eSysman, he's actually the person who brought me to your channel. Glad that you guys could do a collab for us.

[@aparise1]

Same here!

[@ericsarchive7718]

Reverse for me. Both quality Yacht Tubers.

[@glennman0922]

Same here

[@dennisbrown9023]

same here

[@garyhaberfield]

As a 32 year veteran in the land based electricity supply industry, this serves as a stark reminder to me never to take electricity for granted. Like fire it can be a life saver or a killer. Don't fear it but you must respect it. Condolences to those robbed of a love one.

[@brolohalflemming7042]

I both fear and respect it. Heard a few handy tips from qualified electricians, like "Never become the path of least resistance" to keeping hands in pockets around exposed kit to avoid touching it.

[@JAMESWUERTELE]

Also left hand breaker rule.

[@borysnijinski331]

Yes fear it and respect it.

[@brolohalflemming7042]

@scabthecat I.. think so. Even though electical engineering was part of my degree, that was a) a long time ago and b) taught me that getting protection wrong can easily end up fatal. And this has also introduced me to the idea of how to provide a safe earthing system to something that's insulated. Issue here seems to be the heating element failed in such a way that the casing became live, the earthing had too high a resistance, so the poor engineer ended up closing the circuit and providing the lowest resistance path to ground. Which also leaves me wondering how you could make this safer via ELCBs, which seems challenging unless there's an ELCB per device/conductive path. But this is why I leave this sort of thing to professionals.

[@dospalmascb]

My grand father died as a linesman after a pylon was incorrectly labelled (that’s my understanding but I may be incorrect) and he ascended the wrong part of the structure and was electrocuted, he survived the electricity but succumbed to pneumonia related to it.

[@AVMamfortas]

I gave thought to writing a piece about this video and the manner in which you presented it. I realised that it would run to several thousand words. So, to be as brief as possible, you dealt with a tragedy in a most sensitive way, explaining in great detail the mechanics of the accident with efficiency that did not lessen the sensitivity. Both presenters should be congratulated for their professionalism and humanity. For the engineer who suffered, may his soul rest in peace.

[@lucybluitt655]

Video was well done. God bless Wayne's family & colleagues. Such a terrible shock for the crew & owner who apparently was on board.

[@diverbob8]

AMEN to that ....

[@SirHackaL0t.]

The advert in the middle doesn’t sit right though. Seems to be using this tragedy to make money.

[@normbond8888]

Tristen as always an informative & compassionate video of a very tragic event. Thanks for the input of eSysmam in regards to the technical aspects of explaining how this event happened. His KZbin channels are a great compliment to what you provide so thanks to you both.👍

[@rohawaha]

Marine Electrician , Always , Always check voltage on any appliance twice before service. Before you lockout the breaker and AFTER YOU TURN OFF AND LOCK OUT THE BREAKER . I lost a colleague a few years ago to this , he checked for voltage on a 220v appliance , went and turned off the clearly marked breaker. But failed to check voltage again before servicing. It turned out someone had bypassed a bad breaker and wired "line" directly to a buss bar. Many of these vessels are 20-30 years old and been worked on in foreign countries or by non licensed electricians. Be safe !

[@blackal53]

Of course - but..... that is not relevant to this incident.

[@wernerdanler2742]

We had steam powered generators aboard ship in the Navy. Three, quite large ones, in each engine room. I could fire them up but never touched any part of the electrical components. These provided the electrical power for the entire 500+ foot ship. I never really understood electricity and I'm glad I never had to get near that much juice. I do now know, at least what 3 phase is, since I never did before, thanks to eSysman who I watch regularly. I guess 60 cycle single phase is good enough for my coffee grinder. Thanks for that report Tristan and RIP to the engineer.

[@danstrausbaugh6430]

I’m an licensed electrician/ contractor , I found this to be a very knowledgeable explanation on all a fronts ... well done !!! I personally use a special mat that you s what lineman use to protect themselves from electrocution... typically when electrocution occurs and a death is the result it’s because of fibrillation of the heart ... I find it interesting that no mention of the electric current exiting his body esp with 480 volts ... I’m surprised their wasn’t much more physical damage that was discussed... what we do for a living can reach out and grab you cause you can’t see electric current flowing... you seriously have to have your head in the game at all times... and a professional tester is the most important tool to have ... excellent video...!!!.. sorry it was related to a human being life loss ....

[@demonknight7965]

I knew what he was discussing mostly the only things i didn't know/hadn't been taught were the cycling and how 3 phase worked. Please be safe out there.

[@diverbob8]

Not that it matters a great deal, but the actual problem voltage would be 277 VAC (Phase to Ground). 480 VAC would exist only between the three Phase to Phase (A-B, B-C, C-A). combinations. This guy was laying on Neutral/Ground (probably with extensive contact area) and came into contact with at least one of the Phases.

[@Dobermanator]

I am nobody but with an empty pocket book out of necessity I take on many different tasks around home from auto repair, plumbing, and electrical. The first thing I do before I look at anything electrical is I take my super inexpensive multi-meter and I check it's (meter) calibration on a known source, then I test all aspects of whatever I am working on electrically, usually a receptacle / split receptacle, switch, socket BEFORE I touch anything, and then of course once I've identified the issue I turn off the power. I am surprised that no one can explain or even theorize why a similar process was not followed here.

[@borysnijinski331]

It was actually a very poor explanation of how electricity works. Makes me wonder if he actually knows. Also that you thought it was a good explanation should make you wonder if you understand electricity.

[@TheByard]

I worked as a leading miner, TBM operator in the tunnelling industry, electricity is used the light the underground works 24/7 and power the machinery used. I was taught never to touch a collapsed person near power cables or machinery and to use a non conductive implement to push pull them clear. Otherwise the rescuer could be shocked as well. I took the Red Cross first responder course in the UK and Taiwan, plus the Enclosed Space rescue course at a job site in Dover UK, this entailed using breathing equipment which is no mean feat when carrying a person on a stretcher out of a tunnel 1 mile+ long. My hat goes off the firemen who do this a lot. I owned a wooden boat and all the sacrificial anodes were connected together and then to the earthing terminal, the engineer who carried the Boat Safety inspection did test this system and accepted it as OK. Only single phase was used. Being retired I set my self tasks to keep my brain working, boat electrics will be the next one. I did wonder watching charter yacht videos a while back and that is are the crew trained in First Responding and do they have equipment to hand. That question has been now answered. Thanks to both presenters for explaining in clear terms. My condolences to the family and friends of The Chief Engineer. RIP

[@judycook1918]

I tip my hat to you. My father was an electrical contractor, The explanation of how electricity works was the first I have heard that made sense and I understood. My Dad was old school and thought girls would not understand anything mechanical and had no time to explain So...Thank you!.

[@gro2709]

Outstanding video. First, I know absolutely nothing about how electricity flows and eSysmans' explanation was concise and easy to follow. Second, I had never known about the grounding of yachts. Thanks for explaining this in easy-to-understand words. The next time I take a trip on a boat, I'll remember the hard-working engineers who keep us going. And I'll remember this incident and the heroic efforts of the crew and EMTs who tried to revive their fallen friend.

[@huguespor3591]

I was commissioned by French gouvernement to investigate on Yacht One More Toy for this accident 30 minutes after they are declared Wayne death. I can confirm My condolences to the family and friends

[@Donald_Shaw]

Very informative video, Captain Tristan but sorry to hear a life was lost. eSysman is another KZbin creator that I also follow. He posts excellent high-quality videos of yachts and delivers interesting commentary on said yachts.

[@robertstancer4469]

As a retired electrical engineer can i clarify a point or two. Electrical circuits need to be insulated - away from anything other than the conductors, live and neutral, and the item requiring electrical power. Even the heating element in your kettle has insulation around the bit using the electricity. Should a short circuit occur, the live coming in contact with the neutral/earth, we had fuses that blew, (in the old days), but now MCBs'. (miniature circuit breakers), like a light switch, they can be reset. As esysman stated, if the earth connection has been lost there is no problem until a failure occurs - like happened here where, from what i could gather, water managed to get into the loadbank connection box and come in contact with the live terminals of the heater element. The box being metal then became live. As there was no effective earth connection the MCB did not trip. The engineer then became part of the circuit when touched both the box and anything metal in the engine room. My guess is the water appeared from a failure of one of the heater seals. The reason for posting this is that i worked in the Petro/Chem industry where earthing was the most important thing ever for obvious reasons and earth bonding was tested regularly. My sincere condolences to the family of the victim for their tragic loss.

[@tedb.5707]

I've recently been reading about the dangers in the waters of a marina due to latent AC current bleeding through the ground plates of adjacent yachts and the docks and pontoons.. What used to be attributed to dockside drownings around the docks have been found to be electrocution instead. Never let your kids, pets or guests swim in your slip or to your tender. Get away from other boats and docks first, and have your dock connections checked if you have an isolated private dock. This also includes going over the side to clean the hull while in the slip. If necessary, use an inflatable boat or your dingy, don't go in the water while in the marina.

[@549BR]

This is all true and can happen on land where a neighbor has a leaking circuit to a poor ground and a person in an outdoor shower is hit with live voltage.

[@demonknight7965]

That makes a lot of sense now. That's why they say no swimming in the marina area besides possibility of being smashed between moored boats orbrun over by a boat.

[@borysnijinski331]

Rule 1 about marinas is do not swim in marina...this is one of the first things they teach you when you take boating course and is the first rule people break when they get to marinas. The number of people I have seen in the water cleaning their hulls before race night boggles the mind.

[@williambikash6645]

Electric shock drowning (ESD) is more common than people realize. There is a website put up by a person who lost family members to this not well recognized problem. The site has put a great deal of information out to the public. The danger is much greater in fresh water than saltwater because saltwater conducts stray currents to the bottom fairly well. Freshwater is a poor conductor so stray current looks for the path of least resistance which unfortunately can be a person swimming into a field of leaking current. I think a body acts like a large capacitor absorbing stray current. People swimming toward the stray current have felt the energy and backed away or have been overwhelmed and have been shocked/electrocuted. The leakage can be your boat, other nearby boats or the marina wiring. Smaller boat marinas in the USA are largely 120/240 single phase. I don't know if 480V 3 phase would somewhat overwhelm the natural grounding of saltwater. I told a diver who did zincs and other marina diving about this and he stopped diving especially in freshwater. To be safe in the water you have to shut off the marina power and make sure no boat is running a generator. Years ago we use to joke that there was so much current in the water that a light bulb thrown in would glow. Unfortunately not so far from the truth.

[@richardpowles-brown2775]

@@williambikash6645 yes, clean/fresh water has a higher resistance than our bodies. Our slightly lower resistance could attract current in certain circumstances. Back in the telecomms days we were taught about "Hot" stations - power plants where the earth potential could be 1000V different than at the telephone exchange. I can understand how a floating vessel with faulty equipment could create an electrical field in the water around it. ..

[@ah244895]

I watch both eSysman channels and, of course, Super Yacht Captain. A great collaboration.

[@JCZ0RR0]

Great collab, so nice to see eSysman on here!

[@dreamlife2351]

As someone with no knowledge of engineering, I truly appreciate and understood most ( if not all) of the master engineer’s education

[@bubaks2]

My condolences to the family of the good engineer. RIP. I pray his family is coping well.

[@paulviezee3973]

Great video and even better awesome you guys teamed up on this occasion ( although the circumstances are sad )

[@MIDTOWNE1]

Ok Captain you got the right engineer to break it down. I watch both his channels also. Good to see you guys work together and a nice surprise.

[@marieamesbury6688]

Good to see the collaboration with my two KZbin favourite channels, thank you !

[@olejohanpetersen7604]

I really like both your channels, and I just feel they are so much more credible when you interact in this way.

[@johnthegreek7356]

Finally an eSysman collaboration!

[@LivingTheDream21]

I didn't know eSysman was an engineer and had all this knowledge. I thought he just loved Yachts and did some work on them in the past. That's Awesome!!

[@borysnijinski331]

Is he an engineer? Just bec he knows about electricity does not make him an engineer; similarly, I know a lot of electrical engineers who have a poor understanding of electricity.

[@LivingTheDream21]

@@borysnijinski331 No he is an engineer because Tristan said he was an engineer 😂 4:27

[@borysnijinski331]

@@LivingTheDream21 to people in UK just about anyone with tools is “an engineer”.

[@blackal53]

@@borysnijinski331 I wasn't seeing any comprehensive knowledge of electricity - there. His stumbling presentation on 3-ph power wasn't even relevant to the incident. Instead of bits of twisted wire, a couple of sheets showing block diagrams showing the current paths would have been better than the Blue Peter show.

[@YachtReport]

@@blackal53 Explaining how electricity works might not be useful to you, but I never made the video just got you. I made it for people who have no idea so understanding it helps them understand what happened. What is almost always the case is people like you who shit on people who make videos in comment sections have NEVER posted a video. You have no idea how to make videos, how hard it is to film a subject, or what it takes to do all that and make it enjoyable for others to watch. Try making the video that is so easy yourself. Perhaps you can get Boris here who is also shifting on the video to help you? Dumb and dumber collaboration. Then you can tell me how easy it is.

[@qno-oj3py]

The function of a Defibrillator is to stop a fibrillating Heart with a shock. Fibrillating is uncoordinated contraction of the heart. The defibrillator can detect a fibrillating Heart by a specific electric signal measured. When the defibrillator detects no heart signal ( because the patient has died) it will not see a shockable heart rhythm and therefore will say No Shock on the display. All crew members have acted correctly. My condolences to the family and crew involved in this unfortunate accident.

[@alantillett7614]

It was all good, excellent report. Part of my training when I was a trainee Engineer in aerospace. We learnt all of this. People think that when they get a tingle from an electric current, no matter what AC or DC. Battery or mains can be funny etc. YOU DO NOT MESS WITH ELECTRICITY. No matter What anybody says. REMEMBER the human body is 80% water. I feel really sad for the Engineer, it must be a real tough job on a yacht.

[@SkypowerwithKarl]

Bring in the expert to clarify and totally muddies it up. In simple English; The engineer got electrocuted by touching an equipment housing that was improperly grounded(or disabled). That housing became electrified when the insulation of an internal component (heating element) failed. By touching that housing and another body part making contact with some other object that was grounded, more than lethal voltage and current passed through his body. This would have been less likely to have happened in a metal hulled ship. This ship is made of fiberglass which is a very good insulator so a component not grounded would have the potential to become electrified. Perhaps a GFI device would have shut off the power instantly and saving his life. Yes they make them to work at those voltages.

[@borysnijinski331]

His poor explanation of how electricity works would suggest he only thinks he is an expert and with flashy graphs fool the ignorant into believing he is an expert.

[@YachtReport]

The difference between your explanation and mine, is yours won't make any sense to someone who does not know about electricity. My brief was to explain it to people who don't know anything about the subject. If I said what you said, nobody would be any the wiser.

[@YachtReport]

@@borysnijinski331 Boris, put your money where your mouth is and make your own video, instead of just being a 'that guy' in the comment section of a video.

[@SkypowerwithKarl]

@@YachtReport Well e, I’m glad you’re not currently working around hot circuits. I don’t want hear of another tragedy.

[@YachtReport]

@@SkypowerwithKarl Your comment is patronising but the reality is I’ve been working at sea for 20+ years. People are free to think what they want and to try to elevate themselves by attacking others. But it’s petty. But if it floats your boat then enjoy. I’ll leave you to it.

[@odinn50]

Thanks very much for this video. The explanation of how 3 phase AC electricity works is one of the better ones I've seen. I was shocked years ago by 110 volts, and was lucky to survive it. Definitely taught me to respect electricity. RIP to the unfortunate chief engineer, Wayne.

[@borysnijinski331]

It was a poor explanation of 3 phase power...oversimplified and distorted for the layperson.

[@lewiscowden618]

So sorry to hear the bad news. My prayers and thoughts are going to the family. 🙏😢

[@simonrose8685]

Very sad story. Thank you for bringing such an incident to attention. Thank you for Esyman for your explination. I never understood 3 phase until now. I was at uni many years ago and a fellow student recieved a small sock from a capacitor. 45 minutes later he suffered a heart attack while walking to lunch. He was 19... Electricity is not kind to us!

[@chrisharris3142]

This is why if anyone has a shock they should go to A&E for an ECG even if they feel OK

[@chillee2531]

As an Electrical Engineer currently employed in the Commercial Microwave Oven Industry working on High Voltage 3 phase l can confidently say who ever is responsible for that vessel, the original Engineer, needs to be held to account for that death. Every Engineer is aware immersion elements are at very high risk of mechanical damage from moisture. Add Sea Water into the equation, wow. Even if it’s not a written rule to regularly check, as an Engineer they should regularly check Earth Insulation just out of good practice. Every piece of equipment l have to establish several safety checks before touching equipment, Earth Insulation being top 3 checks, every time without exception.

[@borysnijinski331]

I suspect that a lot of these “engineers” do not have an engineering degree. In UK they call anyone with tools an engineer.

[@chillee2531]

@@borysnijinski331 the definition of an Engineer in the English language is and l quote the Oxford English Dictionary. noun: engineer; plural noun: engineers 1. a person who designs, builds, or maintains engines, machines, or structures. In Britain we have many different qualifications which differentiate the role that person is qualified to. Some snobs do label an Engineer as a person qualified to degree level, this language issue has caused a bit of a debate. Keep to the dictionary term, it’s easy to understand. As any Engineer will happily tell you what education level his or her qualifications are. In this case the Chief Engineer would be qualified for the role, with or without a degree. As is the case with any job in a professional level.

[@borysnijinski331]

@@chillee2531 where I am from, zero FGs about Oxford definition...to be an engineer you need a licence and to get that licence you need to go to university and get an engineering degree. Then you need to work in industry for 5 yrs to gain relevant experience (that experience resume is evaluated to ensure it is relevant). Then you need to write test on law and ethics. Once that is all completed satisfactorily, only then can you call yourself an engineer. Avoids having anyone with tool calling themselves an engineer.

[@chillee2531]

@@borysnijinski331 in you’re country the translation to English will give you the nearest equivalent. What a person calls themselves is kinda irrelevant, as you’ve stated you have to pass certain examinations and experience. That’s no different to the U.K. there are hundreds of different categories of Engineers, one word fits all I’m afraid. Also just remind yourself, those who discovered and pioneered Electricity didn’t study the subject in University 😉. May l suggest you watch the full video explanation of what happened, maybe watch it a few times just to make sure you’re not missing anything as you’re making stupid irrelevant comments on the matter. Just for the record have worked with East European Engineers, you’re Universities must be really poor........

[@borysnijinski331]

@@chillee2531 buddy tries to tell me about English and does not know difference between “your” and “you’re”...FYI English is official language of my country...do not let my name fool you.

[@c18888]

When working on industrial electric systems always protect yourself from becoming the circuit. Stand on an insulator like rubber mats or plywood, it is always best to de-energize a circuit especially when dealing with grounding (earth bonding) issues as the electricity doesn’t have a path to earth and it’s looking for one. Also with bonding issues you need to remember the earth(ground) system has every system tied to it so if your working on a system and shut off the right switch to kill the power, you can still get electrocuted from a different circuit while it is running its power to the same earth ground.

[@johannluckemberg4464]

Because of events like this, the glamour in this job fade away. Very informative video, thanks Capt.

[@leebatt7964]

My coworkers think I’m a worrywart when I test the ground before working on any electrical device. This is exactly why. 480 angry pixies will end you easily.

[@lacswe]

Yay, another video, even if it is about something tragic.. Thanks for covering it though.. R.I.P.

[@bosgaurus1]

Wow. I'm sorry for the loss of a member of the family, for the loss of a member of the crew, and the loss of a friend. May you all have peace soon. Thank you for the explanation of the event.

[@roshandmatabick6676]

We often only think of yatchs as pleasure crafts, not as working vessels. So sorry for his family and friends. Good seeing my 2 favourites.

[@tomdaley9154]

Soooo happy to see yall two doing a collaboration video. You guys are my two favorite superyacht channels

[@stevenzobel4517]

My condolences go out to the family of the engineer and those of crew who got to know the man may he rest in peace

[@mohammednadeemanwar2213]

I spent 25 years of my life in Electro-mechanical engineering, anything from commercial, and factory to power generation station itself. I has to work live to test electronic control systems, to 20,000A busbars in DC traction substations. I always adherered to safety but unfortunately over confident or prankster 'jack the lad' attitude of newer employees. I resigned and retired entirely from engineering, I eventually moved to art and design. its extremely tragic when unforseen situations takes lives, leaving behind loved ones.

[@diverbob8]

Tristan, your review of this sad incident is much more pertinent than even you may believe. I am an industrial electrical troubleshooter with over 50 years experience and I can tell you that both of those Two Failure Elements of this event are actually everyday occurrences. First of all, the efforts made to construct electrical systems that are waterproof are rarely ever 100% effective for very long. Thus, the mess around the heating element wiring comes as no surprise. Note: In the case of this load bank, there were (are) no less than 12 possible ways for that fault to occur. Each of the three heating elements had insulated feed through connections at each end (3 times 2 = 6). Then there is the insulation of each to the actual heating elements that contained the current, thus 3 more points of failure. (running total = 9). Departing the immediate area, the insulation of the 3 Phase Wiring coming to the unit extends the total to Twelve Failure Modes of the First Failure Element. The Second Failure Element is that of the faulty Neutral / Ground. To emphasize from your presentation, the sole purpose of grounding (now referred to as Bonding) everything on the ship (or factory) to a common point is to be Absolutely Certain that any of those Twelve Failure modes listed above, will result in a FAULT CURRENT flowing back to the protective device at the Power Source (Fuse or Circuit Breaker) and resulting in a blown fuse or tripped breaker. Where I frequently see the confluence of these two issues is during maintenance and or repairs. The equipment is heavy, the areas are oily or dirty, the environment is hot, uncomfortable, confined, etc. Sometimes, the personnel involved may be chosen for their tolerance of the conditions, physical strength, physical size (tight spaces), etc. What happens is a focus on "making it run" as opposed to completing every last task, like dragging out the ohm meter or even less likely, the insulation tester (same function as ohm meter, but applies much higher voltage specifically to catch marginal insulation). As the Captain, it would never hurt to ask and or observe, after such an event, if all the guards and grounds have been verified to be as intended. Best Regards PS, In 50+ years, I've been shocked a few times and I got across 277 VAC about a year ago while standing on a ladder working on an electric roll up truck bay door operator. While it was very unpleasant, I did not fall and proceeded to complete the work (at that time, age 72). In my case, the contributing factor was an electric brake in the door operator with which I was unaware. I won't make that mistake again. Second example, many years ago, I bought a house that had an electric range built into a wooden counter top. Right next to it, was a wooden cabinet that also contained a built in electric oven. As it turned out, the range was grounded and the oven was not. One day, after I lived there for about 10 years, I was leaning against the metal oven door which contained a faulty heating element and when I reached over and touched the metal range top, I was hit with a solid 120 VAC shock. Same exact elements as your event - Failed Insulation & Missing Ground (Bond).

[@chillee2531]

The whole Electrical Industry has multiple stories of electrocution. It’s very easy to under estimate the invisible danger. I don’t have sensation in my left index finger thanks to a 2500v capacitor with a failed discharge resistor, my finger was touching ground so it left two pin size burn holes & frazzled the nerves but failed to travel further. Working in commercial kitchens you witness the stupidity of people, from a guy who crossed the safety barrier to stick his finger towards a HV transformer, to another who crossed the barrier and began cleaning dust of internal components with a wet cloth. No matter how much you explain the risk, don’t enter an area or touch anything people occasionally do.

[@borysnijinski331]

50 yrs experience and still not enough sense to be wearing insulated safety boots and use a fibreglass ladder or check for presence of voltage before you work on anything. You’d think you would know about lock out tag out.

[@chillee2531]

@@borysnijinski331 pretty sure by this comment you’ve not a clue what you’re discussing.

[@borysnijinski331]

@@chillee2531 actually, I am very clued in

[@chillee2531]

@@borysnijinski331 I’m sure you think you are.

[@mwrcrft]

Great vid my favorite two Super Yacht crew members, Esysman excellent explanation of the electrical circuits and how earth ground happens

[@tomedwards9265]

I love watching this vlog and will continue to watch simply because I like the manner in which the captain explains things so well. It's sad whenever a life is loss. Its hurts everyone who knows or works with the deceased. You miss and mourn them and, additionally, wonder why death occurred and whether the deceased had any responsibility for their own demise. I'm a home inspector and licensed building contractor with over 30 years experience so I come into contact with energized electrical components regularly so trust me when I state that the deceased could have prevented his own demise had he followed well-known safety measures. One should never touch a conductive material without first testing for voltage, especially while working in an unfamiliar environment or with unfamiliar electrical devices. If I understood the explanation from the engineer, it seems that there were two faults within the electrical system. A. there may have been electrical current leaking to the water within the heater cabinet due to worn out element shielding and B. the "grounding/earth" conductor was disconnected or broken between the elements and the metal plate on the underside of the vessel. As an engineer, the deceased knew full well the risk of contacting any conductive material before doing so, yet he proceeded even after seeing the historical evidence of previous water leakage around the heating device seals within the cabinet. The stains, and the fact that the heater was probably original equipment (older equipment is more likely to fail in some manner) should have been enough of a clue to take greater safety measures before touching a metallic equipment cabinet with bare hands, or head, etc. He could have tested the electrical elements for resistance prior to energizing the elements and found the fault prior to risking his life. I'm only stating these issues because the public should be aware that there is a safe methodology to using older, possibly unsafe, equipment so that no one has to die. People do it every day, including myself, so that they can continue to live and gratulate themselves for finding an unsafe device prior to someone else's injury. When working with, or around, electrical components, you must assume that all conductive components are energized until you confirm otherwise. Simply touching a metal water supply tubing, or "ground/earth" conductor electrode, has the potential to cause severe electrical injury under come conditions. Never ASSUME; and we all know how to break up the acronym, don't we.

[@tomedwards9265]

I wanted to add a comment about shared responsibility for this accidental death between the deceased engineer and the previous, full-time engineer. For anyone who works with electrical components that are in constant contact with water, especially salt water, it should be common knowledge among the trade how corrosive salt water can be to any metallic component, such as an electrical heating element as described in the load bank. Salt water is so corrosive to metal that a recommendation for inspection and systemic replacement should be a regular maintenance recommendation for any metallic component, especially one which is in contact with electricity. Why the elements were in continued use long after corrosion had occurred is a wonder. For instance, an electrical water heater element will fail to function quickly when corrosion allows contact of the electrically-charged component with water within the holding tank and....if the grounding conductor should fail in the manner described by the engineer the metallic cabinet surrounding the inner reservoir could become energized as well. So, this has some potential for injury on land as well as at sea, depending on the components and conditions.

[@erikv793]

We empathize with all the family and friends, In these sad days. I wish you lots of strength.

[@justaguy6100]

Both of you are my personal favorite fantasy life channels ;-) It's a shame this collaboration was for such a grim story. One thing it would be important to note that electricity will always try to follow the path of LEAST resistance, such that when you touch a conductor, if your body provides a path to ground then you get shocked. When an arc is happening, it's because that electric potential has built up to such a level that it can bridge an air gap to ground, even that that's actually a very resistant path in itself. I worked for an electric utility company some years back, and we lost one crewman working on a substation due to arc from a transformer. The two people most likely to suffer injury working with this type of equipment are 1) someone utterly uninitiated to the safety needs and 2) someone who's been at it so long, they don't take an essential step as they feel they can take a shortcut, that may have even worked in the past. I hope steps are clear on how to avoid such tragedies onboard ship in the future. There's no safety measure too inconvenient to save a life.

[@stephenparkes626]

Even after all this time our thoughts still go out to his family and friends.

[@borysnijinski331]

Bet family and friends are saying “thanks for the thoughts, they are very helpful”.

[@basharb4678]

Great to see you both join forces. Was hoping this day will come. I am a subscriber to your both channels. Love every video you published, looking forward to see more joint talk.

[@jdrissel]

That 100k earth is essentially an open circuit. You can draw a thick black line on paper with a #2 pencil that has a lower resistance. It looked to me like the water getting in the terminals area could explain the failed insulation, but not the failed ground. I suspect the grounds at the buss bar were loose. It can be hard to detect this reliably. Normally the wire would be checked for being loose and the connector would be checked to make sure it has not loosened. But on a boat, everything corrodes. You have salt air, high humidity, rapid temperature changes and lots of vibration. When you open the door, hot humid salty air comes in and it will condense on any cold surface. This corrosion can both sieze a bolt and loosen the wire, so when you attempt to check things it feels tight, and just the heat from you hands may distort the wire just a bit so that it actually makes contact for a little while. This is an area where the way we have always done things is not good enough. We really need simple, cheap, reliable connectors that will stay tight and are easy to inspect in spite of the conditions afloat.

[@patrickabas1112]

Utterly sad story, I hope all in the industry will take extra precautions so this does never happen again.

[@fisherh9111]

Every time eSysman speaks I feel schooled. He is so knowledgeable and so good at explaining things. Thank you eSysman.

[@scott6002]

Absolutely agree. I found the explanation to be first class. Thank you.

[@borysnijinski331]

His explanation of how electricity works and testing of insulation resistance was actually very poor.

[@fisherh9111]

@@borysnijinski331 if you have a better one, I am more than keen to watch it - otherwise don't waste my time.

[@borysnijinski331]

@@fisherh9111 sure...stay ignorant. WTF do I care...I know, you don’t, you don’t care that you do not know better and I don’t care that you don’t care.

[@fisherh9111]

@@borysnijinski331 you got it! Glad we understand each other now. Life is easier when you stop worrying about other people’s problems. Trust me. I say that with all sincerity. Go forth, be merry, explore and play, do as you please. Death comes to us all so do not waste what you have left. The modern world is no place for those that care.

[@andrewk7745]

As an electrician. Rpm doesn’t change with number of phases. The maximum an A/C motor can turn is 3600 rpm regardless. The factors associated with RPM on an A/C motor is frequency and number of poles. There is however slip, so 3600 rpm is in theory only. The fewer the poles the faster the rpm with the consequence of reduced torque. There is slip due to rotating weight and load, but the motor will keep playing catch-up. The formula is 60 cycles per second and 60 seconds in a minute. 60x60=3600 rpm. 4 poles 1800 rpm. Just had to point out this discrepancy. Otherwise a good basic explanation for someone that doesn’t understand electricity and doesn’t really need to know more.

[@raypitts4880]

ERRRRR THING IS SOME OF HAVE TO USE 50HZ CYCLE MAINS 50X60

[@MegaWebsters]

Interesting. Thanks for taking the time to put this informative video together.

[@denisiwaszczuk1176]

Thanks guys for reminding of the jobs for comfort . RIP Wayne

[@dave.willard]

The next time anyone is tempted to bypass that “inconvenient” ground prong they should think about this. My advice is to throw away any two-prong extension cables you might own and replace them with high quality three-prong cables. In EVERY case of electrocution the person is forming a circuit from an energized wire to ground. Bypassing ground plugs opens the door for you to become that ground and that is not good.

[@geraldryan8562]

Thanks Skipper along with the excellent breakdown from another professional I watch also. It is a crying shame that any engineer would loose his life in this manner, so so sorry. In future, may I please advise the following or similar depending upon country of registration be born in mind in regards to Special PPE required for high voltage work. CFR. 1910 Part Number Title:Occupational Safety and Health Standards Subpart:1910 Subpart I Subpart Title:Personal Protective Equipment Standard Number: 1910.137 Title: Electrical Protective

[@jwhite2847]

It's good to see you two collaborating on a video.

[@josephgrcar1025]

Wow! Esysman gave a really good explanation. Should be a science teacher if he ever gets tired (probably not) of yachts! Thanks to all.

[@TheTir1962]

Grounding and bonding, grounding and bonding. The most important part of any electrical system is it's ability to deal with fault current, a short. People tend to forget or disregard the grounding part of the system until it is too late. If the grounds on this system were in good shape it would have been more than capable to handle the fault and cause the breaker feeding the load bank to trip or turn itself off. Put ground system checks into your PM (preventive maintenance) schedule please PLEASE!!! I have seen these kinds of accidents happen way too many times and they are almost always preventable!!!

[@380Scania]

Really sad event and sending kind thoughts to family and friends of the Chief Engineer ☹️

[@seatravel8536]

Sad, however if one person learns something it may save many lives. Excellent eSysMan excellent explanation. Condolences to his entire family.

[@pauldownes7039]

Firstly, as an electrical professional, I would like to add my condolences to the family and friends of Wayne. Unfortunately, AED’s require the heart to be at least in ventricular fibrillation to operate. As an Electrical Inspector, I have had to investigate many electric shock incidents, fortunately non of which were fatal. The first question I need to ask is do these yachts have RCD’s/GFL’s (Residual Current Devices / Ground Fault Limiters) installed. Admittedly with the age of this particular yacht, they probably aren’t installed but with the environment the electrical installation is operating in, this should be a serious consideration for the owners of all these vessels.

[@fullyearthedelectrical5101]

My thoughts exactly! ‘98 predates widespread use of RCDs in the UK domestic so I imagine this boat was not updated. Interesting to read the report and see if that’s picked up on.

[@dennischristensen5767]

The hard part of assisting someone who appears to have been electrocuted is not touch them and secure the power first. Then administer first aid. In this Boatswain’s case it may not have been apparent that electric shock was involved but luckily it turned out safe for the boatswain as the victim was no longer in contact with the electricity. A seaman was being shocked working for me and it’s so hard to THINK don’t touch while our instinct is to aid them ! In that case he was in obvious contact with a running machine which i secured first then tended to him …and he was returned to duty in a couple hours. We were both very lucky.

[@michaelmurphy2602]

Good info. Love ESysman, have subbed to his channel for a long time as well.

[@markuswunsch]

While taking about electricity it would also be interesting to learn more about the current state of lighting strike protection systems on yachts as loosing all your electronics at sea seems to be a real risk when getting hit by one.

[@549BR]

As an ex-electrician, I can't emphasize enough the importance of metering a circuit after it has been turned off. There can be all sorts of leaks from faulty apparatus and wiring. And, only fools work on live circuits; it should never be done.

[@MonkPetite]

Big lessons for yacht engineers. Thanks for sharing.

[@CAUSELESSREBEL]

Superb explanation by both you and my other buddy esysman to such a tragic event. Well done to both of you.

[@bobbiemitch]

Very good explanation of electricity. One thing missing, is that electricity will always take the path of least resistance. So, if the grounding connection has a high resistance, the electricity will seek a lower resistance path, such as the human body.. So sad that this even came up.

[@georgeburns7251]

Best video. Esysman and super yacht captain. Thank you soooo very much

[@michaelrivera1165]

Thank you both for sharing this, I love both your channels. It is sad and unfortunate that this happened. I would say this could have been prevented and a good solid service should be done once every two or so years. Take care and God bless you all.

[@hogger51]

Tristan: The Red Ensign Group Yacht Code (Part A January 2019 Edition, Chapter 8a, Electrical Installations, Vessels of Less Than 500gt) reference compliance with the SOLAS Regulations. And yes, I did download and review the document. The SOLAS Regulation (II-1 part D Regulation 45) discusses “Precautions against shock, fire and other hazards of electrical origin.” 1.1 Exposed metal parts of electrical machines or equipment which are not intended to be live but which are liable under fault conditions to become live shall be earthed… It appears the vessel was not incompliance with Regulation 1.1 That said, failed earths, grounds here in the States, can be very hard to identify especially if intermittent. But I will defer to the other commenters with extensive practical experience. Their observations are spot on. Thanks for the video on a sad but important incident. Ramón

[@abbeychase4718]

AED's do not do anything if there is no heartbeat. Administering a shock is not designed to bring a heart back to life, it's designed to actually cause the heart to stop when it's experiencing severe irregular rhythm (i.e. heart attack is an example). Stopping the heart with a shock gives the brain the opportunity to literally 'reboot' the heart and when doing so, hopefully do it with a proper rhythm. If there is no heart beat, the AED is unfortunately not able to bring the heart back to life :-( Only proper vigorous CPR can have any impact at this point.

[@raypitts4880]

MY MATE has heart problems he goes and has the heart stopped the tuned back in seems drastic works for him.

[@mjkulikow]

When your house inspector warns you about open grounds when they check outlets, THIS IS WHY! Its not a crazy high risk in your house because very few AC "things" actually exist in a house anymore (notice how few 3 prong plugs you have) but in boats or commercial environments its a HUGE risk.

[@demonknight7965]

Uhm actually everything in the U.S. in modern houses is single phase 3 prong supposed to be grounded outlets. Some of the cheaper products you buy that have three prongs just have the ground prong embeded in plastic. But your outlets and lights and even your satelite dish is grounded. Your tv cable from the pole to your house will sometimes contain a ground wire running between them.

[@mjkulikow]

@@demonknight7965 none of those things will turn into a battery if you have an open ground.

[@mjkulikow]

@@demonknight7965 and your cable TV wire is grounded because it comes in from outside, its lightning protection...

[@patbullard9276]

I don’t know where you are but in the U.S. our houses all run on AC power unless you’re off grid using alternative power sources, such as wind or solar. And even these are inverted to AC to make them usable by electric appliances. Having plugs that are two prong only indicates the lack of a separate ground wire but even they have a path to ground through the neutral wire.

[@mjkulikow]

@@patbullard9276 I dont know of where you are but neutral is not a return to ground. Ground is ground, neutral is not ground anywhere but where it is bonded at the panel.

[@macdchef]

What a fantastic collaboration

[@boruchshlomogluck3560]

So sorry to hear hope you and the crew are okay now

[@Matt-ft2nz]

Super Video with the excellent explanation from Sysman!

[@paulkersey2179]

Good job SYC and CE. Having worked on ships with 600KW power I know the danger. Life is precious.

[@raypitts4880]

LIKE WISE 600 V DC POWER TO TRANSMITTERS. DONT TOUCH THE CAPACITORS JUST SAYING

[@wizardgmb]

Tristan, thank you for presenting this tragedy to us so we all can learn from it and thanks to esysman for a clear, concise description of the technical aspects. 🛳️😁

[@bear88mb]

difficult to watch but a message everyone needs to hear-

[@trafalgar1938]

An absolute brilliant assessment by the Engineer. What a shame it came with such a sad story.

[@scottdowney4318]

Sad, and there were 2 electrical equipment failures, the heating elements failed sending current into the water-device, and the ground wire was bad. The high voltage makes it easier to send current through a person. On my boat, I once felt a shock when touching the water coming out from the heat exchanger for the Cruisair heat pump which uses 120vac. Inside the connection box on the unit was wet from rain, and had standing water cause the drain was clogged. So the wet wires was enough to send some current into the ground system. Current will return anyway possible, not all the current will return on an even good ground, it continually seeks any path back to source. My fix was to make a bigger drain drilled it open to 1/2 inch. Move the potential relay higher up in the box so it can never get submerged in standing water in the box. AND, I installed a GFCI-AFCI breaker on the wire in the circuit breaker panel for that heat pump circuit. I get zero nuisance trips. It has worked reliably since the fix. Could have been seriously bad say if someone had jumped into the water and went near the heat exchanger water outlet. Water is going to find its way into things on a boat. The box cover is not sealed, water can get in from dripping down the outside face and collecting between the cover and the base at the bottom of the box, and if it cant drain, it will fill up a little like 1/2 inch and the motor potential relay can get wet. It really was a design error from OEM, unit is old from mid 70's so maybe they improved it.

[@ebbhead20]

Fixed the sound problem i found in the last vid. Good stuff 👍

[@claychilds5215]

My heart and feelings go out to the family of the captain. I am a electrician and when you deal with 480 3 phase and do not have a natural ground is totally unacceptable and should have been discovered, by the builder and the inspector!

[@JAMESWUERTELE]

It was more than likely caused by degradation, hence the repair.

[@stoneygreek]

best explanation of Phase I have ever seen

[@privateschmuckitelli4546]

Duuuuude! I recently stumbled across you both independently. Such good stuff from Capt and Esys. Now in same place. I'm giddy..Wish it wasn't due to a tragic accident, though.

[@fredflintstoner596]

Mrs Richards: "I paid for a room with a view !" Basil: (pointing to the lovely view) "That is Torquay, Madam ." Mrs Richards: "It's not good enough!" Basil: "May I ask what you were expecting to see out of a Torquay hotel bedroom window? Sydney Opera House, perhaps? the Hanging Gardens of Babylon? Herds of wildebeest sweeping majestically past?..." Mrs Richards: "Don't be silly! I expect to be able to see the sea!" Basil: "You can see the sea, it's over there between the land and the sky." Mrs Richards: "I'm not satisfied. But I shall stay. But I expect a reduction." Basil: "Why?! Because Krakatoa's not erupting at the moment?"

[@phcusnret]

That's a great explanation of 3-phase electricity! Thank you

[@randypace1852]

What sort of control of energized equipment (lockout/tagout) program is on board super yachts and/or training for working on energized equipment?

[@borysnijinski331]

Apparently no lock out or tag put protocols.

[@stevenbradley6279]

very informative! thanks to you both!

[@GraemeMurphy]

Speaks volumes for the condition of the electrical systems on the rest of that floating life taker.

[@robsimons1609]

So sorry to hear such terrible news..R.I.P brother

[@bobw222]

A great reminder of the necessity for regular poweroff inspections of electric equipment and cabling no matter the environment. Sad that someone had to lose their life for the rest of us to get that reminder.

[@worddunlap]

Lose or improper grounds and neutral are killers. Is it in the preventative maintenance to check all the terminals and connections?

[@henrymorgan3982]

A great report on a sad tragedy. RIP.

[@Taladar2003]

So if the boat is outside of the water, do you have to connect that ground plate to actual ground or are you not allowed to use electrical systems on board?

[@ianlambert6864]

A stark reminder, it’s not always clear sky’s and flat seas on a super yacht .

[@macallanvintage]

Hearing that technical explanation gave me goosebumps. If Im a superyacht owner, I’d immediately instruct the Captain and Engineer to replace the Load Bank, and check all critical wiring especially those below knee level.

[@blackal53]

This was not a "machine-specific" incident. It was a 3ph, 480v machine casing which was 'live' + had no earth-path until the Engineer provided one. It could be ANY electrical machine.

[@macallanvintage]

@@blackal53 Yes. Correct. So, every electrical appliance running on hi-voltage 3phase should be thoroughly checked

[@blackal53]

@JK Low - and replace all the appliances as you suggest with the load bank?

[@macallanvintage]

@@blackal53 Replace every hardware along with all wiring. After all, since you guys are so obsessed with safety and rules and regulations, and can afford such an uber-expensive toy with easy money which is most possibly “financial gambling” money and/or dirty money, spending money on safety matters shouldnt be a huge deal.

[@MIKERU974]

Thanks you both to explain clearly what happened in this drama

[@lonpearson2134]

Sorry to hear of this accident. My condolences to the family. High current flow would likely result in muscle reflex which could have contributed to the head injury. Since the yacht builder is no longer in business, I wonder what kind of support for retrofitting is available to owners of similarly designed yachts. Could a builder be required to issue a recall, if it’s no longer in business?