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Engineer54
Very similar to our UK Reg's in many respects, ours too are minimum requirements, although there are some that treat it as a bible, that cannot be deviated from. I'm often accused of applying my own rules, i'm not, there often requirements that are made in electrical specifications to contracts, which are always of a higher calling than those laid out in our Reg's.
I must say, that the NEC code requirement for minimum Rod Ra values make much more sense than ours. Whereas yours call for 25 ohms ours call for 200 ohms!!! Which is why i've never take any notice of that ridiculous figure, and would never leave a TT system at anything like that value ....lol!!!
Having said that, ...i have no time at all for your ''Multi Branch'' circuit arrangement, or the use of screw/wing nut connections, seen far too many catastrophic failures of those things, and some of them are bloody huge things!!! ...lol!! Anyway it's good to hear you take an interest in our Reg's (BS7671), it's always good to broaden your outlook, and you just never know, ...it may well come in very useful later for you.
Are you working overseas for an American company to US codes or are you working with various codes, as i often find myself doing??
I must say, that the NEC code requirement for minimum Rod Ra values make much more sense than ours. Whereas yours call for 25 ohms ours call for 200 ohms!!! Which is why i've never take any notice of that ridiculous figure, and would never leave a TT system at anything like that value ....lol!!!
Having said that, ...i have no time at all for your ''Multi Branch'' circuit arrangement, or the use of screw/wing nut connections, seen far too many catastrophic failures of those things, and some of them are bloody huge things!!! ...lol!! Anyway it's good to hear you take an interest in our Reg's (BS7671), it's always good to broaden your outlook, and you just never know, ...it may well come in very useful later for you.
Are you working overseas for an American company to US codes or are you working with various codes, as i often find myself doing??