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Do-It-Yourself (DIY) Question & Answer Forum
your thoughts please
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<blockquote data-quote="kme" data-source="post: 176848" data-attributes="member: 113"><p>Scenario:</p><p></p><p>3 storey property used for bedsits.</p><p></p><p>Did a PIR last year; customer now wants remedial costs.</p><p></p><p>There are seven bedsits; each with its own DB - 6A 60898 for lights, and one or two 61009 20A/30mA for S/O.</p><p></p><p>Each bedsit is fed via a 6mm T+E, buried in the structure, from the ground floor bedsit; containing the HED and front-end DBs. The 6mm subs are fed through 30A 3036s (no RCD protection). Supply is single phase TN-S.</p><p></p><p>Now - if I used 32A 61009s for sub-main protection; 2 problems occur to me:</p><p></p><p>1 - the 20A 61009s in the bedsits are redundant.</p><p></p><p>2 - should an RCBo trip on a sub-main, access would be required to the ground floor bedsit to reset it.</p><p></p><p>As far as I can see, the only other option is to renew the sub-mains, in either trunking on surface, or SWA (or similar).</p><p></p><p>Your opinions would be valued guys.</p><p></p><p>KME</p></blockquote><p></p>
[QUOTE="kme, post: 176848, member: 113"] Scenario: 3 storey property used for bedsits. Did a PIR last year; customer now wants remedial costs. There are seven bedsits; each with its own DB - 6A 60898 for lights, and one or two 61009 20A/30mA for S/O. Each bedsit is fed via a 6mm T+E, buried in the structure, from the ground floor bedsit; containing the HED and front-end DBs. The 6mm subs are fed through 30A 3036s (no RCD protection). Supply is single phase TN-S. Now - if I used 32A 61009s for sub-main protection; 2 problems occur to me: 1 - the 20A 61009s in the bedsits are redundant. 2 - should an RCBo trip on a sub-main, access would be required to the ground floor bedsit to reset it. As far as I can see, the only other option is to renew the sub-mains, in either trunking on surface, or SWA (or similar). Your opinions would be valued guys. KME [/QUOTE]
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