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Notifying The Council Of Cu Change And Additional Garage Submain
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<blockquote data-quote="brianabsolute" data-source="post: 291063" data-attributes="member: 6179"><p>Hi Amateursparky</p><p></p><p>Not wishing to upset other posters, but the Fire Safety (Approved Doc B) contains the following in relation to smoke and heat alarms:</p><p></p><p>"The detectors and alarms are required to be permanently wired with an independent circuit to the distribution board (cu), <strong>or preferably</strong> supplied from a local, regularly used lighting circuit (there should be a means of isolating the supply to the alarms without switching off the lighting;"</p><p></p><p>So, no sharing with the house alarm. Instead, suggest you install a switched FCU next to the cu, with the supply from one of the lighting circuits (existing "smokes" supply cable connected to the load side of the FCU). This method has been through numerous NICEIC inspections!!</p><p></p><p>Other comments:</p><p></p><p>As a minimum you'll need a smoke alarm on each floor;</p><p></p><p>Lighting - I use 1.5mm T&amp;E, because there's no need to de-rate if running in thermal insulation (e.g. if first floor lighting cabling in the loft) ; </p><p></p><p>Garage Dist Circuit - I'd put it on a RCD protected way at the CU and then just use a DP isolator in the garage cu (especially if the garage supply is in T&amp;E, rather than SWA;</p><p></p><p>Presumably the 32A "Kitchen Sockets" 2.5mm circuit is a ring, not a radial?</p><p></p><p>Agree you need to de-rate the "boiler" to a 6A MCB, or put a 5A FCU at the load end;</p><p></p><p>Cheers &amp; good luck with the inspection</p></blockquote><p></p>
[QUOTE="brianabsolute, post: 291063, member: 6179"] Hi Amateursparky Not wishing to upset other posters, but the Fire Safety (Approved Doc B) contains the following in relation to smoke and heat alarms: "The detectors and alarms are required to be permanently wired with an independent circuit to the distribution board (cu), [B]or preferably[/B] supplied from a local, regularly used lighting circuit (there should be a means of isolating the supply to the alarms without switching off the lighting;" So, no sharing with the house alarm. Instead, suggest you install a switched FCU next to the cu, with the supply from one of the lighting circuits (existing "smokes" supply cable connected to the load side of the FCU). This method has been through numerous NICEIC inspections!! Other comments: As a minimum you'll need a smoke alarm on each floor; Lighting - I use 1.5mm T&E, because there's no need to de-rate if running in thermal insulation (e.g. if first floor lighting cabling in the loft) ; Garage Dist Circuit - I'd put it on a RCD protected way at the CU and then just use a DP isolator in the garage cu (especially if the garage supply is in T&E, rather than SWA; Presumably the 32A "Kitchen Sockets" 2.5mm circuit is a ring, not a radial? Agree you need to de-rate the "boiler" to a 6A MCB, or put a 5A FCU at the load end; Cheers & good luck with the inspection [/QUOTE]
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