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Michael 65

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  1. So as this worked fine with the last smoke alarm fitted, why does it only work now with the light switch on, and does it have anything to do with the white wire in the ceiling recess.
  2. I just replaced an old mains smoke alarm with a BRK 660 MBX. Now, the old one had a green light on all the time, this new one i needed to change the baseplate as well, as the connectors were different, so i pulled the wires down through the hole from the ceiling, so i had three bare wires, brown, blue and white, screwed the baseplate to the ceiling and loosened the small screws so i could put each wire into the connection, blue wire opposite the blue wire in the baseplate, brown opposite brown wire and white opposite white wire. and tightened the screws, now, this white wire from the ceiling h
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