Cordless Crazy wrote:
I want to run a new cable from my consumer unit to pick up 2 CO alarms
and 4 smoke alarms:

Is a 1.5mm cable from a spare 16A MCB okay?


Make it a 6A MCB and no problems, however 16A is a) far above what is
required for smoke alarms, and b) unlikely to be sufficient protection
for a 1.5mm circuit.