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Where to position AFDD's in HMO subs
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<blockquote data-quote="Jimbo6871" data-source="post: 540691" data-attributes="member: 34647"><p>Hi all, </p><p> Looking a bit of input. </p><p> First HMO install since AFDD's became mandatory in HMO's. </p><p></p><p> Install details: Main Board: 18 way TP&N with overall SPD feeding out via 20A RCBO's through individual MID meters to 14 rooms, CU in each room feeding 1x 16A radial to 1 twin 13a socket and 1x 6a for light circuit.</p><p></p><p> So the question is do I use combined AFDD/RCBO's at the main DB (giving AFDD cover to everything down stream - cable, CU, light and socket) OR just RCBO's at the main board and use a combined AFDD/RCBO on the radial to the socket in the CU located in each room? </p><p></p><p> I would have thought that the further upstream the AFDD is the more protection it is giving but the regs require AFDD only on the socket circut in this setup if my interpretation is correct.</p><p></p><p>Go easy, first post here!</p><p>Thanks in advance</p></blockquote><p></p>
[QUOTE="Jimbo6871, post: 540691, member: 34647"] Hi all, Looking a bit of input. First HMO install since AFDD's became mandatory in HMO's. Install details: Main Board: 18 way TP&N with overall SPD feeding out via 20A RCBO's through individual MID meters to 14 rooms, CU in each room feeding 1x 16A radial to 1 twin 13a socket and 1x 6a for light circuit. So the question is do I use combined AFDD/RCBO's at the main DB (giving AFDD cover to everything down stream - cable, CU, light and socket) OR just RCBO's at the main board and use a combined AFDD/RCBO on the radial to the socket in the CU located in each room? I would have thought that the further upstream the AFDD is the more protection it is giving but the regs require AFDD only on the socket circut in this setup if my interpretation is correct. Go easy, first post here! Thanks in advance [/QUOTE]
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Where to position AFDD's in HMO subs
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