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Smoke alarm off lighting circuit
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<blockquote data-quote="PC Electrics" data-source="post: 114274" data-attributes="member: 650"><p>I think this is the thread you're thinking of:</p><p></p><p><a href="http://www.talk.electricianforum.co.uk/showthread.php?t=7776&amp;page=2" target="_blank">http://www.talk.electricianforum.co.uk/showthread.php?t=7776&amp;page=2</a></p><p></p><p>The upshot was that smoke alarms can be on their own circuit or combined with a lights circuit. Either way, the smokes must be provided with a means of isolating them from the supply without interupting the lights.</p><p></p><p>Many ways to skin a cat and all that: I'm putting in the wiring for a loft conversion at the moment. This entails adding smoke alarms (x3). I'm extending the upstairs lights to give lighting for the new rooms and adding the smokes to this circuit. The smokes will take their supply from the 2nd floor landing switch, so to achieve the requirements above, I'm putting in a grid switch with one switch and one key switch for isolating the smokes (and a label on the CU).</p><p></p><p>If you can take the smokes supply back to the CU then a means of isolating could be to simply remove the supply cable from the MCB (label the cable for easy ID).</p></blockquote><p></p>
[QUOTE="PC Electrics, post: 114274, member: 650"] I think this is the thread you're thinking of: [URL="http://www.talk.electricianforum.co.uk/showthread.php?t=7776&page=2"]http://www.talk.electricianforum.co.uk/showthread.php?t=7776&page=2[/URL] The upshot was that smoke alarms can be on their own circuit or combined with a lights circuit. Either way, the smokes must be provided with a means of isolating them from the supply without interupting the lights. Many ways to skin a cat and all that: I'm putting in the wiring for a loft conversion at the moment. This entails adding smoke alarms (x3). I'm extending the upstairs lights to give lighting for the new rooms and adding the smokes to this circuit. The smokes will take their supply from the 2nd floor landing switch, so to achieve the requirements above, I'm putting in a grid switch with one switch and one key switch for isolating the smokes (and a label on the CU). If you can take the smokes supply back to the CU then a means of isolating could be to simply remove the supply cable from the MCB (label the cable for easy ID). [/QUOTE]
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Smoke alarm off lighting circuit
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