This BEAMA technical guide provides guidance.īack to top Do I need to install a metal consumer unit in domestic premises? Most consumer units now come with a torque setting sticker as standard, otherwise, the information is available from the manufacturer. Regulation 134.1.1 of BS 7671:2018, states that the installation of electrical equipment shall take account of manufacturer’s instructions. This over-heating can potentially cause the consumer unit to reach a high enough temperature for a plastic enclosure to ignite. These high-resistance terminations can generate high amounts of heat where the connections can actually glow red.
Regulation 526.1 of BS 7671:2018 requires every electrical connection to provide durable electrical continuity and adequate mechanical strength and protection. If you over tighten the connection, you could crush the conductor causing a hotspot and increasing the risk of it breaking. If a connection is not tight enough, it can create hotspots and arcing. This IET Wiring Matters article ‘Which RCD Type’ provides further guidance on RCDs.īack to top Should I use a torque screwdriver? Previous versions of BS 7671 required a label to be installed advising the user to press the test button quarterly, this has changed to six months in the current version of BS 7671:2018, as indicated in Regulation 514.12.2.Ī good way of remembering to test your RCD, do it when you change the clocks, that way it will be done twice a year.
If RCDs are regularly tested by operating the test button, problems can be detected. Operating the RCD test button provides assurance that it is operating correctly. Do I have to install SPDs in a domestic installation?
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