Recent content by Stringy75

Three phase 4 wire supply from a three phase triple CB to that board and the Red phase going to another board

The Switches are rated for 400V

Hi, I am training to become and electrician, I have passed my C&G level 2 exams. I am working as an electrical improver. I came across a consumer unit today, which has two main switches and two phases L2 and L3 supplying it. Is this board to regs? Can you take 2 phases to a consumer unit?

He said a ring final circuit is wired in parallel. It makes no sense to teach a ring final circuit is wired in parallel and a radial circuit is wired in series. The terms parallel and series have specific meanings in respect to electrical wiring. It would be confusing to say a radial circuit...

He said a Radial circuit is wired in series. It is not, it is wired in parallel. I have left my notes at college, I was going to share all the other c**p  he taught us today but I don't have my notes to hand :(

Our tutor told us this is how we should wire a radial circuit. With that extra earth wire???????????????????

Thank you I can't believe our tutor told us there were wired in series, when i challenged him he said i was wrong. Unbelievable

That could be the confusion. Not on my part though, on the tutors part. I challenged about 10 questions, I have them here with me. I think I was right on all 10 questions and they said I was wrong. I can't believe the tutor told the class a radial circuit is wired in series and then said i was...

thank you :)

Hi, I am a trainee electrician. On my course today I was told a Radial circuit is wired as a serial circuit and a ring final circuit is wired as a parallel circuit. This makes no sense, surly they are both parallel circuits. Can somebody please give me a sanity check and tell me I am right...

Not on TT, it was a TN-C-S system. 100 amps would trip an MCB but i don't think it would trip in 0.4 seconds. Would it not need 160A to trip in 0.4 seconds on a type B MCB. 32 x 5 = 160. The bimetallic strip would trigger the trip in a short time, not sure how long it would take the solenoid to...

Thank you Doc, Thank you for taking the time to write this and for your advise. I will always check  Earth, bonding, polarity and Ze first in future on every installation I work on. Much appreciated :)

One question, if a nail did bridge line and earth, would earth gain the same potential as the line?

Yes I have a copy of guidance note 3, I have read it. I will re-read it again too. Maybe the electricians I am working with are not good at fault finding. They are good electricians though I am glad i joined this forum. Started me off on a good foot. I will follow the testing procedure by the...

Sorry you are correct, impedance accounts for capacitance and inductance and is the correct word to use when talking about AC circuits