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Do-It-Yourself (DIY) Question & Answer Forum
Installation of domestic sub-mains to individual flats
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<blockquote data-quote="Evans Electric" data-source="post: 472216" data-attributes="member: 1408"><p>If I were you I'd forget SY , its useful cable but has no standards or BASICS approvals . Also I'm fairly sure it doesn't go to the bigger sizes you'll need. </p><p></p><p>Also , I think we discussed on here , we can't use split con under 7671 , mainly , again I think, because there is no outer earth (SWA) </p><p></p><p>Just use SWA it'll be the cheaper option anyway. </p><p></p><p>As for isolation , yes cables runs like you describe require fusing and isolation but not RCD . Although you say the mains will pass down through the building fabric in the flats , this means , if you bury them in the wall they'll require RCDs or mechanical protection . You don't really want to be burying a big SWA cable in the wall , well I wouldn't anyway . </p></blockquote><p></p>
[QUOTE="Evans Electric, post: 472216, member: 1408"] If I were you I'd forget SY , its useful cable but has no standards or BASICS approvals . Also I'm fairly sure it doesn't go to the bigger sizes you'll need. Also , I think we discussed on here , we can't use split con under 7671 , mainly , again I think, because there is no outer earth (SWA) Just use SWA it'll be the cheaper option anyway. As for isolation , yes cables runs like you describe require fusing and isolation but not RCD . Although you say the mains will pass down through the building fabric in the flats , this means , if you bury them in the wall they'll require RCDs or mechanical protection . You don't really want to be burying a big SWA cable in the wall , well I wouldn't anyway . [/QUOTE]
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Installation of domestic sub-mains to individual flats
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