@JimmyT said:
The intercom system will be part of common property unless there is a by-law to say otherwise. Electrical cabling to and including the internal fuse box will be the same.
The intercom system would be common property but the security system and the electrical wiring within the lot is the owners responsibility if it ceases to work due to normal failure.
BUT if the failure is caused by an insurable event then it becomes claimable on the strata insurance policy because these items are covered by the Strata insurance. So whether the damaged equipment is lot or common property is irrelevant if it’s a strata insurance claim.
Mind you proving the damage was caused by an electrical storm is a different matter and good luck to the OP on that one.