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Ask The Trades › DIY Forum › Electrical Questions › New Wire

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New Wire (Read 14244 times)

oldspark GDPR opt-out	Re: New Wire Reply #17 - Jun 18^th, 2009, 7:07pm Lec. am I right in saying if you would use dual RCD would you separate lighting and power so as to not be totally out of power or lighting if one RCD should trip? One last question on this issue, what mA RCD'S, two the same 30mA's or different.
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oldspark GDPR opt-out	Re: New Wire Reply #18 - Jun 18^th, 2009, 7:57pm Smoke alarms , I intend to feed direct from consumers unit on its own circuit , would it be ok to connect on non rcd side of dual board?
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Y3 GDPR opt-out	Re: New Wire Reply #19 - Jun 18^th, 2009, 8:21pm Quote: Smoke alarms , I intend to feed direct from consumers unit on its own circuit , would it be ok to connect on non rcd side of dual board? Depends if your going to bury the cable less than 50mm in the fabric of the building or not, without some form of earthed metallic covering?
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Re: New Wire
Reply #20 - Jun 18^th, 2009, 8:35pm

Quote:

Lec. am I right in saying if you would use dual RCD would you separate lighting and power so as to not be totally out of power or lighting if one RCD should trip? One last question on this issue,
what mA RCD'S, two the same 30mA's or different.

You will have two 30mA rcd's that will come with your dual rcd, split load cu, as well as a main isolator.

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oldspark GDPR opt-out	Re: New Wire Reply #21 - Jun 18^th, 2009, 9:34pm Garage feed 6mm T&E from consumers unit to sub main rcd protected @ garage will be buried in less than 50mm in wall at some stage of the run , if i sheath well can I run from main consumers unit from 40a mcb non RCD side of dual board?
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Re: New Wire
Reply #22 - Jun 18^th, 2009, 10:41pm

Quote:

Garage feed 6mm T&E from consumers unit to sub main rcd protected @ garage will be buried in less than 50mm in wall at some stage of the run , if i sheath well can I run from main consumers unit from 40a mcb non RCD side of dual board?

If the 6mm t&e is enclosed in some kind of earthed metallic covering when buried less than 50mm in the wall, then the 40a mcb on the unprotected side will be ok, not sure how you will adequately earth steel conduit or capping if its only going to be installed for part of the run?

You could just use SWA and export the equipotential zone if there are extraneous conductive parts out in the garage. A supplimentary 10mm earth could be attached to the SWA to provide the bonding, or you can select a suitably sized SWA to act both as an Earth and Bonding conductor (I dont know how large this would have to be, as I dont have the regs to hand)

« Last Edit: Jun 18^th, 2009, 11:10pm by cosbycarl »

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supra59 GDPR opt-out	Re: New Wire Reply #23 - Jul 27^th, 2009, 8:15pm its good practice to put the smoke detection on with the lighting circuit as if it trips its easy to see as the lighting will also be off, where as if seperate fuse this would not be the case hope this helps
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