Hello, I am dealing with an office refurb and existing installation consisting of about 8 rotary isolators on a ring circuit wired with 2.5mm2 singles and fed by BS88 32Amp fuse. From as builts it appears isolators supposed to serve power poles which appears were never installed, but I would like to reuse the existing circuit to feed new HRU - about 3Amp 1ph supply. Do I need to change the circuit to radial/replace isolators with fused spurs or can I reuse one of the existing isolator? I feel I can't use the isolators but doubt arose in me when my boss said that he thinks using isolators is compliant with BS. Please let me know, thank you :)
I would connect the new fan to the existing circuit via an RCD fused connection unit equipped with a suitable fuse. There is arguably no need to upgrade the whole existing circuit with RCD protection, but any additions should have RCD protection. I see no need to retain to retain the existing isolators, but also no harm in leaving them in place if this is simpler.
I would connect the new fan to the existing circuit via an RCD fused connection unit equipped with a suitable fuse. There is arguably no need to upgrade the whole existing circuit with RCD protection, but any additions should have RCD protection. I see no need to retain to retain the existing isolators, but also no harm in leaving them in place if this is simpler.
