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Hi Andy yes I find alot of places still have incandescent lighting and generally I'll wire in a separate hot mains to the bar to bypass the dimmers.

Hi Geoff thanks for your reply yes it is a big set up of incandescent lighting well over 100 fixtures and yes i learnt about diversity but always wondered what if though lol, thanks again 

I think I've answered my own question by explaining it to my friend its got to depend on the distributors main fuse by the meter I would assume the main switch on a dB board has got to be equal too or greater than the fuse rating so to much demand just blows the fuse and not damage any of...

Hi everyone just a general question I came across a 3 phase board at a university and it was running 12 stage lighting dimmer packs 3 phase all on 32a 3 pole mcbs and 2 circuits on 64a mcbs, my question is if the dimmer packs was to pull 30a each the mcbs would be fine but would the 100a main...

Hi Phil d OK I'll keep that in mind I'm from Telford mate not far from you.

Hi special location I did test the RCD without any loads and tripped at half the load, as for your question I wouldn't expect the RCD to trip at 6ma leakage as the RCD is a 30ma and won't trip till it senses over 30ma difference between line and neutral. And on off yes I thought about swapping...

I don't keep my certificates and they are in my name but I now they are safe and if customers want to see them then my company sends copies I don't need to keep them,  my company is an a v company not electrical we only occasionally install electrics when needed.

To be honest on off I haven't read that bit in the book as I've never had a problem testing an RCD but the way I was taught was to use my metrel at the socket or accessory and do the RCD test and it would do the 6 tests but recently after being advised I did read up on RCDs and stood corrected...

Hi on off I have guidance note 3 inspection and testing and know how to do my step by step testing as explained in previous threads and also know what results I require. Thanks  Mel 

Hi special location yes I understand what your saying and yes my certification has got course numbers on them, will check in due course as the company holds my certificates. Thanks Mel 

Hi kerching the courses I did was the short course organised by my company a month long course back in 2008, I had a basic knowledge of electrics but this course taught you practical installing, theory from ohms law to testing and inspection and building regs and more that I can't remember and...

Thanks guys for all you input and I have taken it all in. Thanks Mel 

Hi Murdoch yes I checked all the cable runs I could possible do and did continuity tests to check what cable did  and where it went luckily they where labelled up, I going back after work today to do what you suggested. Thanks  Mel 

Yes I have got the on site guide and a copy of the bs7671 18th edition and it does not say how to test an RCD without a load, only where and when to use them, the only way I have been taught to test RCDs is to do the ramp test as per the schedule of results which  on my meter does 6 tests 1x the...

I've never had to test one before I've an idea what to do but rather it be clarified first.

How would I test the RCD without any loads 

I believe it has had new wiring my friend only just purchased the house at auction and looks new just missing the db hence why she asked me, now got this challenge but I see it as a learning curve.

No they never mentioned it at all as I remembered.

Hi Murdock  Yes the walls are plastered just not painted or wallpapered and no carpets and yes I've researched about borrowed neutrals and I read about once you pull a borrowed neutral it then becomes live thanks for the advice, I'm just wondering because there has not been any heating on for a...

Thanks all for your comments I'm going back tomorrow to redo my IR test on circuits and see what I get and do it the way Murdoch told me to do it. Luckily the house is not lived in at the moment just a shell with plaster board on, thanks again