Brilliant i passed a recent test because of this video very well explained...
@jalilalmteen5363 жыл бұрын
Great job I am following your video , It's really interesting & helpful
@MrHonestharry11 жыл бұрын
Great video, where did you get button-type probes from ?
@freeform44809 жыл бұрын
Hi great video. 1 question please, ...so do you actually go around the plant, factory, house, building etc. and disconnect all PC's, toasters, equipment, light bulbs, and burglar alarms. surely youl miss something, and then run the risk of blowing up something, pls could you explain how you go about that task.
@user_i.d7 жыл бұрын
Fredre Olivier... good point just imagine 1 month of second fix and you now got to take apart 1 months worth of 2nd fix to test so you can hand in the results before hand over on Friday. Now what do you do?😦😢
@eggysoldier90807 жыл бұрын
Fredre Olivier Just disconnect the circuits with sensitive equipment and do a test between live and neutral connected together to earth and that stops any damage, i'm no expert but this is what i've read in gn3
@Bacon891004 жыл бұрын
How do you go about the task? Easy. If it's a Friday afternoon, you just put it on 250v instead of 500v.
@rayalbion9637 Жыл бұрын
i would drop voltage to 250v d.c and/or put live conductors together (as one) and test them between earth
@asp2174 жыл бұрын
Hi. Should you have not removed the neutral conductor before carrying out a 'global' insulation test as it would be connected to earth upstream? The isolator is 3 pole only and does not break the neutral
@Bacon891004 жыл бұрын
I guess it depends on the earthing arrangement. He's correct if it's TN-S. You're 100% right otherwise, though.
@asp2174 жыл бұрын
@@Bacon89100 Neutral is connected to earth at the transformer so it wouldn't matter. If it is a 3 pole isolator then the neutral is not being disconnected at the DB
@galax5749 жыл бұрын
If one particular circuit breaker is needed to be tested, where shall the test be carried out, upstream or downstream of the breaker?
@daniel-jordandominique7965 жыл бұрын
do you have to disconnect rcbo and ring circuits and if so how do you get IR values for them separately
@tpb29873 жыл бұрын
if i have a Dol on an isolator can i still test 500v with the isolator in the off position right?
@roberttierney1638 Жыл бұрын
Shouldn't be getting 1000 mega ohm reading between neutral and earth as they share the same fault path back to the meter and on to the star point of the transformer the neutralising link coming into the board needs to be disconnected for this to work
@rravichandar7138 Жыл бұрын
RCCB and MCB Continuit test and installation test (do i need to keep the MCB and RCCB in ON position)
@roromboraragattv8390 Жыл бұрын
What is over range?
@TheAnonyte10 жыл бұрын
Thank you very much
@user_i.d5 жыл бұрын
Why did Chris set the insulation tester to 500v when you should test the circuits at double the voltage. I assume that a 3 phase DB is 430v, shouldn't the megger tester be set at 1000v. Can anyone explain?
@fynlinemusic3 жыл бұрын
BS7671 states this is the voltage to use ‘up to and including 500V with the exception of SELV and PELV, but including FELV'
@chriskitcher11 жыл бұрын
Have to disagree with you, sorry! The breakers are square D and are in fact in the on position, just as you correctly said they should be for this test. Thanks for trying to be helpfull though.
@usmanamjad970710 жыл бұрын
thank you v much sir
@danbryan27288 жыл бұрын
Should be 1000v insulation test between phases as it needs to be double the voltage , 500v is only 100v over normal voltage
@hpterrick8 жыл бұрын
Read your BS7671 part 6. This is a common misconception. If you test 600V cables at 1000V you have exceeded their Vmax and so are theoretically kippered.
@mattkeen38118 жыл бұрын
Incorrect. Test is 500v for systems up to and including 500v.
@j3s0n5 жыл бұрын
@daniel bryan, I'm confused, please could you explain why you think that?
@rayalbion9637 Жыл бұрын
what about c.t coils around feeds ect. ?
@abdulbasitkhan29323 жыл бұрын
Good.vidio
@mikeadler4342 жыл бұрын
👍👍
@frasermclean111 жыл бұрын
Rest of his videos are good
@paullazalo64643 жыл бұрын
I like is megger
@jacksonest934 жыл бұрын
You should NEVER test between ACTIVE and NEUTRAL!! Only between ACTIVE (or phase) and EARTH or NEUTRAL and EARTH. If you put 500v across a single phase load you’ve got a very high chance of fucking something