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yeah bud meant pirs with photocells so they only work when dark, and yeah they will be energy saving lights that will naturally come on at different times. would be at this for weeks trying to wire remote pirs, as its a finished stairwell. but i agree would be better wouldnt it be a...

been given a job to fit photocells in a 3 storey luxury residential block, lights are on 2 circuits for top and and bottom levels. they are constantly on and only switched from the fuseboard and keyswitch controls mounted next to the db. think 5 lights per level on the stairs, one of those...

could be either the timer, circuit, fused spur, off peak supply or the actual element. if the stat is fine its most likely the timer but i would check the element first. resistance between the lives should be 20 ohms and both clear to earth. often the timer works on boost ok but the off peak...

im always seeing 100mm nails bursting through loose cables, dont think it matters with a nail gun as cable doesnt have enough time to move. it does however make it easier to rewire when cables arent clipped

without using any powered swithgear can anyone tell us how its possible to wire a circuit where removing any off the 3 legs eliminates power to the lighting points completely?

ah right, is it multiple choice then? some people say they do the 2382 before the 2391, i done the latter because i was out of work and a lot of people were asking for it. what do you mean computer based? are the options on screen and you bring in your own regs book?

got my 2391, but never seen the need to go and sit the 2382, done all that in college 10 years ago, got my select 17th edition but nic ispector tells me this counts for jack ****!, anyone got any idea on the types of questions and price for the exam and maybe a 1 day course? thought the 2391...

your overqualified bud, you can read and write :)

are you sure removing any 1 red stops all lights? a lot of the times i see that its usually lights, alarm and doorbell circuits on the one fuse

think i done alright for that time off the night bud, and after many a heineken stubby as well :lol:

shut up coljack, a lot of these circuits that im called out to were energised before i was even born

sound, and once again another mistake by me, i meant 10,000 ohms. thanks ricicyle. would i have to disconnect transformers for this or turn them off at switch? i.e switching live off.

once again my bad, so if the fault resistance is 10,000kohms and the suppy voltage is 240, with only fixed wiring in the form of t+e cable, the leakage current would be 0.024 amps? 24ma? close to a rcd tripping current?

yup, missed out the wee difference of K and M there. 0.024ma is a pretty rubbish example, lets say it was leaking 0.01Mohm

so am i actually right? :D some good words lads, "inversly proportional" "dialectric" "torroidal leakage" lol

lol, what is it with people comparing electricity problems to everday life? surely a fault will lessen resistance and increase current? if the resistance l-e is 10,000ohms, 240 volts? 240/10,000 = 0.024 so if i ir test a l-e fault to be 10Mohms will it leak 24ma? or am i talking pish?

flameports bang on, at your age you will never make your money back, your measly flaccid office body will crumble with the manual work, plus i know several good electricians at your age with nearly 30 years experience that are struggling for work. would your boss employ an ex electrician that...

in my job, im more focused on the wiring faults, if say the the L-E ir test showed up 10Mohms would this circuit leak to earth if energised but no load drawing through it? its just domestic faults that im called out to, so only transformers would be on the bathroom lights, shaver point etc

part p only applies to england, got proper electricians up here :P

right then say the house is drawing 10amps and leaking 5ma, would this mean if the house used 60 amps the rcd would trip at 30? or would it depend on aqppliance leakage?