Various guidance shows running an additional cpc as a ring. What are the implications of running two cpc’s, but terminate them as the radial, each cpc being terminated in a separate terminal within a twin earth accessory. Each circuit cpc then terminated separately back at the DB. This would do away with usual steal link on the accessory. Amount of terminations would be the same.
Are you suggesting running two c.p.c.s in parallel through each accessory - so 4 c.p.c.s to terminate at each accessory (except the last) - two into each of the two PE terminals?
I don't see why you shouldn't do it that way if you wanted, but you would have to make absolutely sure that you were connecting one "in" and one "out" c.p.c. to each terminal, rather than both "in"s to one terminal and both "out"s to the other - as in that case you'd be back to a single loose connection could disconnect all downstream earthing (exactly what the duplicate c.p.c. and twin terminals was meant to avoid). In practice where you'd typically just have a pair of unidentified cables poking out of the wall, that's probably going to be difficult - so just taking an extra c.p.c. direct from the last accessory back to the DB is going to be simpler and easier.
The steel link on most accessories is not only to join the two PE terminals together (which is necessary anyway if the duplicate c.p.c.s approach is going to remain effective given one loose terminal) - but (for 13A sockets at least) it also provides an earthing facility to the faceplate fixing screws (and hence to the backbox in some circumstances).
Are you suggesting running two c.p.c.s in parallel through each accessory - so 4 c.p.c.s to terminate at each accessory (except the last) - two into each of the two PE terminals?
I don't see why you shouldn't do it that way if you wanted, but you would have to make absolutely sure that you were connecting one "in" and one "out" c.p.c. to each terminal, rather than both "in"s to one terminal and both "out"s to the other - as in that case you'd be back to a single loose connection could disconnect all downstream earthing (exactly what the duplicate c.p.c. and twin terminals was meant to avoid). In practice where you'd typically just have a pair of unidentified cables poking out of the wall, that's probably going to be difficult - so just taking an extra c.p.c. direct from the last accessory back to the DB is going to be simpler and easier.
The steel link on most accessories is not only to join the two PE terminals together (which is necessary anyway if the duplicate c.p.c.s approach is going to remain effective given one loose terminal) - but (for 13A sockets at least) it also provides an earthing facility to the faceplate fixing screws (and hence to the backbox in some circumstances).
