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hi I could do with some help how do you recogfnise what kind of type opf 3phase system is present in an installation i.e. tnc-s, tn-s single phase I know,but three phase i don't - some pics or links would be great

hi guys. my boss has gone away for a month and has left me to carrying on first fixing on a new job. well the site manager from the previous site has contacted me about the main entrance door not locking properly i.e. the hinges or whatever they are onb the lock that is controlled by the...

An insulation resistance tester needs to be able to supply an output of 1mA at the required test voltage? Can someone please tell me why. I've checked all my books, including GN3, Regs, OSG, and I can't find the answer to my querry Thanks in advance

How long should a D-lock "test" be applied for i.e. how large a current should I apply in D.C to be able to perform an Earth Loop Impedance Test? Thanks in Advance

When if doing a soft test on an rcd protected ring how long doe the test have to be taken for? 20mS? 30mS? 40mS? Thanks in advance

I was undertaking eath loop impedance tests on my sockets today, and the RCD keeps tripping out before I can get a reading. Any ideas? how I can get my readings Cheers

Vapour Proof Conduit can I use normal PVC conduit in an area where there is the possibility of Sparking or should I use normal steel conduit? Will I need to buy special glands/ grommets/ couplers? Thanks in advance

Hi I'm spuring off a double socket in my garage (5A Switched Spur) to a transformer and from the transformer to an inspection pit. Now I know that at the moment my sockets in my garage are 1metre off of the floor. Should I install the transformer to the same height? The transformer will...

Can anyone please direct me to a diagram on how to wire into a one way one gang switch an extractor fan for a bathroom (no bath or shower) please. I've looked in reference and cn't find anything Thanks in advance

Well, my father has decided to start his own handi-crafts busines at the ripe old age of 55! Which is really cool, he's wanting to build a detached garage/ come shed come workshop, on the side of his house to operate his business in. I'm a trainee sparky (you get what he wants from me)...

Doing a new installation (first fixings), was told by gaffer to drill 25mm hole through truss (3 joists bolted together) they are the main supports for the roof. Have just been informned that this illegal due to the holes making the entire roof dangerous. Anyone got any experience, on this...

is there any1 out there who could tell me what kind of on-site experience is required for the GNVQ that has to be done with Part 2 of Electrical Installation. What I mean is I am working in the sector full-time after completing the part 1 and I would like to know that the photo's of the work...

Well, I've just done my exams and am confident enough to say that I have passed my year 1 of Electrical Installation C&G 2360. Well heres my request being the studious student that I am. I would like to read up on what to expect to study in the second year of my course. So if theres any1...

If theres any1 out there who wants a copy of a previous sample exam paper for Electronics (2004), then post your e-mail address and I'll e-mail them out to you MOD you are not allowed to post e mail adresses on the forum

Well if you've seen my recent posts then you'lle know that I'm just about to do my AM1 next Tuesday to be exact. Well what I need is some helpfull hints and tips from experience on doing: MIM's SWA I know it sounds tedious and a little annoying to reply to, but its really important...

Does anyone know where i can get a step by step (pics) guide for doing mineral insulated cable??? i got my AM1 next week and would like to verify that what I have in my minds eye is the correct procedure Thanks in Advance

3 phase testing Well after nearly 9 months, I'm nearnly there to doing my AM1. ooooooh, I hear you say. I know it is quite, quite exciting anyways the thing is... I'm going to be doing a complete testing of a 3 phase circuit We've never covered it in class to any great depth. So...

phase to nuetral voltage to be 260V

Ok, can any1 explain to me this In a 3phase and Nuetral system operating on a line voltage of 450V the phase to nuetral voltage would be 260V. I just don't understand. I mean I really don't understand. If any one can just give me a quick explanation it would be really cool. Thank You