AFDD MCB's are specifically designed to be retrofitted into existing dual RCD consumer units that already have RCD protection. In new consumer unit installations, a main switch consumer unit is typically used, which is then equipped with AFDD RCBOs.

According to the BS7671 18th Edition AMD2 regulations, from March 2022, AFDDs are mandatory in Higher Risk Residential Buildings, Houses in Multiple Occupation, Purpose-built Student Accommodations, and Care Homes. They must be installed at the source of any single-phase AC final circuits that provide power to socket outlets with a rated current of 32A or below.

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If you need to buy in bulk, we’d be happy to provide a quote. As one of the largest electrical wholesalers we deal with traders every day, so give us a call on 0203 994 5470 or email us