Do you mean there is no CPC in the conduit, but the conduit is metal and is the CPC ? That is OK.- so long as Zs or R2 via wander lead checks out, and also so long as each fitting picks up its earth from the conduit reliably That may involve links from fittings to the back box.
Or do you mean there are singles in the metal conduit , and the conduit has no connection to earth ? That is very much not OK, and should be addressed urgently, probably by adding a CPC core and some banjos or Pariahna nuts to earth as much of the metal as possible.
Do you mean there is no CPC in the conduit, but the conduit is metal and is the CPC ? That is OK.- so long as Zs or R2 via wander lead checks out, and also so long as each fitting picks up its earth from the conduit reliably That may involve links from fittings to the back box.
Or do you mean there are singles in the metal conduit , and the conduit has no connection to earth ? That is very much not OK, and should be addressed urgently, probably by adding a CPC core and some banjos or Pariahna nuts to earth as much of the metal as possible.
