I am planning to install smoke alarm in every room in my newly built extension.
which wire I need to inter connect my smoke detector. there are so called FP200 and some called low smoke wire.
You will need 3-core and earth cable to connect between the various alarms.
1mm² or 1.5mm² csa is all that is needed.
Regular PVC cable is fine. FP200 and LSF cable is not required for your house.
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