the clients expect me to certifcate an installation with red and black singles cables in conduit thats approx 50 -60 years old with no cpcs
my take is i cannot touch this with a barge pole
dave O'Malley
the clients expect me to certifcate an installation with red and black singles cables in conduit thats approx 50 -60 years old with no cpcs
my take is i cannot touch this with a barge pole
dave O'Malley
It MIGHT be acceptable, It was permitted and is still permitted to use the conduit as the CPC, provided that a suitably low earth loop impedance is achieved. There should be flyleads from earth terminal in the box to the earth terminal of the accessories. Metal fixing screws will often provide acceptable earth continuity but it is poor practice to rely on this.
If the single core live and neutral wires are still in good condition and are PVC or polythene insulated they should be fine for continued use. If the wires are rubber/cotton covered than they are probably due for replacement.
It MIGHT be acceptable, It was permitted and is still permitted to use the conduit as the CPC, provided that a suitably low earth loop impedance is achieved. There should be flyleads from earth terminal in the box to the earth terminal of the accessories. Metal fixing screws will often provide acceptable earth continuity but it is poor practice to rely on this.
If the single core live and neutral wires are still in good condition and are PVC or polythene insulated they should be fine for continued use. If the wires are rubber/cotton covered than they are probably due for replacement.
We're about to take you to the IET registration website. Don't worry though, you'll be sent straight back to the community after completing the registration.
Continue to the IET registration site