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
What sort of Zs reading do you get from the far point(s) ? If the conduit is rusted out and you can see the singles, or if there is no earth connection to the far end, then it has probably had it.
However properly jointed conduit can act as the CPC and with PVC insulated singles can last more or less for ever, and a little surface rusting need not immediate condemn anything. The red and black is neither here nor there, but the state of the insulation is - any chance of a photo to set the scene ?
As noted already perished rubber would be a failure, but PVC is likely to be OK unless overloaded, and even waxed cotton if the ends are in good condition, may well be OK for another half century.
Are you doing an EICR or actually working on it to add extra points etc ?
Mike.
What sort of Zs reading do you get from the far point(s) ? If the conduit is rusted out and you can see the singles, or if there is no earth connection to the far end, then it has probably had it.
However properly jointed conduit can act as the CPC and with PVC insulated singles can last more or less for ever, and a little surface rusting need not immediate condemn anything. The red and black is neither here nor there, but the state of the insulation is - any chance of a photo to set the scene ?
As noted already perished rubber would be a failure, but PVC is likely to be OK unless overloaded, and even waxed cotton if the ends are in good condition, may well be OK for another half century.
Are you doing an EICR or actually working on it to add extra points etc ?
Mike.
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