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gawd find out the history and it would help if you took the components off it for closer inspection

I didn't install the CU, just the 3 MCBS. My guess would be so that the lights don't go off in the area where the fault is. And those test results are non-existant.

Could you explain why. :? Also BS7671 looks a tad expensive given the amount of electrical work I do, most of my questions are answered by searching this brilliant forum, so thanks all :)

Thanks for all the comments. I've still got to neaten up the new cables going into the CU with some trunking as they're only clipped roughly at the moment to prevent movement. So when I go to the wholesalers, I'll ask about the RCBOs(I'd have them for the ring finals and put all the lighting...

lawdy didn't see that, I'll have a look edit: Also, I'll put the MCBs in order

The gas/water are bonded from another CU, so that's ok, right? The lighting ccts do not comply with 522.6.6 so should I put them on the RCD side? The old colours was because the shop had run out of the new colours but told me it would be fine if I sleeved them with the new colours. Is...

two 30 ampers?

I fitted the B10, the B16 and the B32. Does it look acceptable to you? Don't mention part P thanks :wink:

my point is Mr. BAS that that is not what I am doing. I had a genuine problem and have now understood what needs to be done. I have bought the handwash unit and I have also already put in the cable. I actually used 4mm even though im using a 3kw unit to be sure. I think I'll unsubscribe...

wow your last line, missed that thanks And yeah, it's not a kitchen/bathroom but ofc there are new ccts. I have already breached part p a few times in the house, and I'll worry about that in the very very distant future when it comes to selling. Perhaps foolish, I know, but that's what we've...

why on earth do you think im lying? for a laugh!? I'm really not that sad :wink: The work needs to be done, and having realised it can't go on the ring as pnly FCUs and sockets can go on the ring and the power draw is more than 13A, I was asking how I would work out the MCB aize/type and...

Thanks very much for the answer, I'll have to rethink then

well i'll be running the cable for sure, and I can do basic bits and pieces, but if someone were to explain what I need to consider in this new situation which I am not familiar with, I would most definitely go and figure the rest out for myself and do it it safely

also wouldn't the 3kw be less than 13A, as I'd use a short amount of flex from the FCu to the heater, or would thte fuse be popping all the time?

im tired :( and errr, so fused spurring 3kw would not be clever as 3kw will blow the 13A fuse. OK, i think my brain is computing that. So dedicated cct then. erm,,,how does one work out what wire/breaker to use then. That TLC thing tells me: Required Cable Size 2.5 mm Voltage Drop...

gawd, i forgot to mention i mean A 3kw water heater thingee mabobbee

for a 3kw heater I've decided... So, what I mean is an FCU (13A or 20A?) not spurred, but with two cables going to it. The run, is through the eaves(?) and under capping on the wall. I'll give measurements, if anyone fancies doing the calcs. The MCB is a type B 32A, and there 3 other...