do regs allow for mains cables to be joined behind a plug face plate?
no, a BS1363 socket outlet is not to be used as a junction box for crimping cables within the backbox.
if, however the final distribution circuit can be re-engineered to meet BS7671 so that the circuit conductors are terminated in the allocated terminals, then extension of circuits is allowed.
crimped, although routinely carried out in practice, is frowned upon as has been shown to be a cause of loosening > higher resistance > higher temperature > combustion
no, a BS1363 socket outlet is not to be used as a junction box for crimping cables within the backbox.
if, however the final distribution circuit can be re-engineered to meet BS7671 so that the circuit conductors are terminated in the allocated terminals, then extension of circuits is allowed.
crimped, although routinely carried out in practice, is frowned upon as has been shown to be a cause of loosening > higher resistance > higher temperature > combustion