| Ask The Trades | |
|
https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl
DIY Forum >> Electrical Questions >> SWA to a shed? https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1242897666 Message started by JamieM on May 21st, 2009, 10:21am |
|
|
Title: SWA to a shed? Post by JamieM on May 21st, 2009, 10:21am :-?Hey guys I'm new to the forum. I'm Putting a new installation in to the shed. I've got a 2way Metal RCD with a 6amp Lighting And a Small Ring Final Coning Of. I've got 6mm SWA going to be run into there its only 5-6 M away from the house. My question is where would the SWA be run into the house? would it be off a fused spur from the CCU? any help would be appreciated thanks |
|
Title: Re: SWA to a shed? Post by greg on May 21st, 2009, 7:49pm If you search the forum, shed / garage supplies have been covered before, may answer your question. |
|
Title: Re: SWA to a shed? Post by Y3 on May 21st, 2009, 8:13pm wrote on May 21st, 2009, 10:21am:
You could run it straight into your main consumer unit protected by an existing RCD or by installing an RCBO, a 20a rated MCB/RCBO respectively will be fine if your using equipment that isnt heavy in using current. You could run it into an adaptable box external to your property, this adaptable box would have a supply from the main consumer unit using Twin & Earth cable. You need to make sure the protective bonding conductors have been installed to the water and gas services, if they apply, before work commences. Whats your earthing arrangement, TNS, TN-C-S, TT? What is your shed made of? Does it have any metallic services in it i.e, water pipe? You need to make sure your installation can handle the additional load as well. |
|
Title: Re: SWA to a shed? Post by baz on Jun 19th, 2009, 11:55pm This arcticle may be of interest http://www.theiet.org/publishing/wiring-regulations/mag/2005/16-elect-inst-outdoors.cfm?type=pdf Note: its written to 16th edition. |
|
Title: Re: SWA to a shed? Post by Brunokid on Jun 20th, 2009, 2:52pm wrote on May 21st, 2009, 8:13pm:
Why would you need RCD protection at your CU? |
|
Title: Re: SWA to a shed? Post by Y3 on Jun 20th, 2009, 9:52pm wrote on Jun 20th, 2009, 2:52pm:
Ha ha, you wouldnt if it were a TN system, however, if it was a TT system then the RCD protection would need to come from the main CU in the house, before the SWA feeding the metal CU in the shed. Whether or not thats with an existing 30mA rcd or if an RCBO needs to be fitted? Who knows? |
|
Title: Re: SWA to a shed? Post by Brunokid on Jun 21st, 2009, 2:07pm Whether or not thats with an existing 30mA rcd or if an RCBO needs to be fitted? Are you sure about that? ;) |
|
Title: Re: SWA to a shed? Post by Y3 on Jun 21st, 2009, 8:05pm Right ok, if it's a tn system and swa is used to supply the shed then the 30mA rcd can be put in the cu in the garage or it can be added at the main cu or come from the protected side of the splitload board, he has sockets in the shed so 30mA is required. If it's a TT system with a 100mA isolator, he still needs 30mA protection for the sockets in the shed, but I see what your pointing out and I feel like a numpty for missing it, he can have the 30mA rcd in the shed as the 100mA isolator is providing fault protection for the SWA and metal enclosure. Thanx for doing it in a polite way, I don't know what's wrong with me sometimes, maybe my brain is coming to it's end ;) |
|
Title: Re: SWA to a shed? Post by Lectrician on Jun 21st, 2009, 8:45pm wrote on Jun 21st, 2009, 8:05pm:
So soon? [smiley=headspinner.gif] ;D |
|
Title: Re: SWA to a shed? Post by Y3 on Jun 21st, 2009, 9:08pm I wondered when you would turn up lec ;) Surprised you weren't the first one to notice my error, you normally have the eye of an eagle where I'm concerned :P So soon you say? I'm now heading towards 40, I would say it was good timing! ;D |
|
Ask The Trades » Powered by YaBB 2.3! YaBB © 2000-2008. All Rights Reserved. |