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Thanks for the prompt reply. Apologies, there is no interconnect coming from the light circuit, only Live, neatrual,earth. The interconnect is coming out to the second alarm. I have 2 x EI141 smoke alarms and 1 x EI144 heat alarm. They are definately wired into the upstairs lighting...

Hello I have a circuit of 2 x smoke alarms and 1 x heat alarm for which I want to remove the interconnecting wire. I beleive the interconnecting wire has been damaged as when all three alarms are connected they sound continously, but when I remove the first alarm in the circuit the other two...