On Sun, 18 Oct 2020 11:31:41 +0100, Dave Liquorice wrote:

Ours are fed from their own MCB in the CU via red triple & earth that
loops one to the next. There could be case to have the same wiring but
fed from a lighting MCB so it's "obvious" if that circuit is off.
However all the alarms have "mains ok" LED which is clearly visble at
night and observable by day.

I also attached a bulkhead emergency light to the circuit, halfway up the
stairs. Useful in a power cut, and it's obvious when the circuit has
tripped.



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