W
wade88
Hi guys,
Again, its been a long time in between posts for me. Taken a new direction in my job role and been focusing on other things. Frankly trying to do less and less electrical bits and bobs and i frankly feel less and less comfortable doing it as its all getting pretty heavy here and I just don't want my head on the chopping block anymore as my skills and knowledge just arent up to the job, so will be looking for a local industrial spark to add to my preferred contractor list in Hampshire (if anyone is interested or can recommend a decent spark). Anyway....
Having the EICR done across all the buildings today, chaps have turned up and instantly laid into me about the 4 pole isolator i installed on a 3 phase supply. The system is PME and had no means of isolation, so i installed an isolator as i needed to do some work on the system. I put a 4 pole on after taking some advice, but this bloke is giving me hell saying i should never isolate the N when part of a PME system as any potential fault currents wont be able to earth etc.... but how is that any different to a domestic supply when isolating the N on a double pole switch?
The regs say all live conductors must be isolated, but i also understand exceptions can be made for TN-S and TN-C-S systems but no where does it say you should NEVER isolate the N? Im getting the whole "ive been in this 22 years mate blah blah" and if i even try and start a discussion to further my understanding, when asking him to just explain his thinking to me, he just tells me hes not prepared to have a discussion he knows best and it will going down as "dangerous" on the report.
Can someone set me/him straight on this. His experience and knowledge is undoubtedly in excess of mine, i just dont feel i am totally wrong on this one.
cheers,
Again, its been a long time in between posts for me. Taken a new direction in my job role and been focusing on other things. Frankly trying to do less and less electrical bits and bobs and i frankly feel less and less comfortable doing it as its all getting pretty heavy here and I just don't want my head on the chopping block anymore as my skills and knowledge just arent up to the job, so will be looking for a local industrial spark to add to my preferred contractor list in Hampshire (if anyone is interested or can recommend a decent spark). Anyway....
Having the EICR done across all the buildings today, chaps have turned up and instantly laid into me about the 4 pole isolator i installed on a 3 phase supply. The system is PME and had no means of isolation, so i installed an isolator as i needed to do some work on the system. I put a 4 pole on after taking some advice, but this bloke is giving me hell saying i should never isolate the N when part of a PME system as any potential fault currents wont be able to earth etc.... but how is that any different to a domestic supply when isolating the N on a double pole switch?
The regs say all live conductors must be isolated, but i also understand exceptions can be made for TN-S and TN-C-S systems but no where does it say you should NEVER isolate the N? Im getting the whole "ive been in this 22 years mate blah blah" and if i even try and start a discussion to further my understanding, when asking him to just explain his thinking to me, he just tells me hes not prepared to have a discussion he knows best and it will going down as "dangerous" on the report.
Can someone set me/him straight on this. His experience and knowledge is undoubtedly in excess of mine, i just dont feel i am totally wrong on this one.
cheers,
haha. 
