Yeah, that'll do it. So if his boiler develops a fault, he cant use any sockets or heat the place in any way until a spark has been.I would buy a RCBO C6 for the lighting, and fit everything else on the RCD side.
In practice, should be ok.
Yeah, that'll do it. So if his boiler develops a fault, he cant use any sockets or heat the place in any way until a spark has been.I would buy a RCBO C6 for the lighting, and fit everything else on the RCD side.
In practice, should be ok.
Indeed it may well have, but it is unavoidable on a TT system.BTW what TTC's talking about has happened countless times on TT installs with a single 100mA RCD
You've been able to do that for years - nothing changed in the 17th which made it allowable where it hadn't been before.And it has been agreed on here that a TT system under the 17th edition CAN be protected solely by the two 30mA RCDs in a "17th edition board" - no overall RCD is required as long as all circuits are covered by one of the two RCDs, and there is a main isolator.
But twin RCD boards werent as widespread until now. Its just one of the quirks of the 17th edition that means it makes it easier to protect TT systems.You've been able to do that for years - nothing changed in the 17th which made it allowable where it hadn't been before.And it has been agreed on here that a TT system under the 17th edition CAN be protected solely by the two 30mA RCDs in a "17th edition board" - no overall RCD is required as long as all circuits are covered by one of the two RCDs, and there is a main isolator.
Hello?There was no motivation to split loads across two RCDs before, and installation of single 30mA RCD incomer boards was common to save costs. Now the loads have to be split, as its in the regs.
Only as far as reasonably practicable though (as per your quote). Safety is always no. 1 priority but cost is always a close second. RCBOs can almost double the cost of a CU installation.The DIYer also has a legal obligation to make reasonable provisions to protect persons operating, maintaining or altering the installations from fire or injury.
If he was being prudent he should, but in practise this is irrelevant. He has considered his own appliances, loadings etc and has accounted for the foreseable loads he may be adding. No-one should really try to second guess what the future homeowners might be moving in with them.ban-all-sheds said:Not just him, but anybody else who lives in the house in the future.
If you dont like it, run the lighting cables in metal conduit and SWA or MICC. Its the simple answer to a robust lighting circuit.RCDs for any non-protected cable buried less than 50mm, thus meaning pretty much all circuits including lighting? A bridge too far.
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