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Do I need a new consumer unit for 3 new smoke alarms?

Hi. I have just had a garage conversion, and in order to get final sign off by building regs, need 3 wired and radio linked smoke alarms. 

Building regs are happy that the wired alarms use the existing downstairs lighting circuit, but I have been given inconsistent advice from the sparks that I have had quotes from. 

The existing consumer unit has a 100 Ma trip protection. Some tell me that I will need 30 Ma trip to comply, others not. Obviously that makes the cost of just 3 smoke alarms quite a bit more expensive, so I wanted to get a view from this forum. 

The alarms would be wired to the local circuit, and in the ceiling bottom and top of stairs, as well as the new room

Help would be really appreciated thanks

Steve

Parents
  • I cannot see how any of the electrical work in the garage conversion can possibly comply without 30 mA RCD protection.

    But apparently it does, so as I said above get the same electrician to do the smoke alarms.

Reply
  • I cannot see how any of the electrical work in the garage conversion can possibly comply without 30 mA RCD protection.

    But apparently it does, so as I said above get the same electrician to do the smoke alarms.

Children