Lighting CPC

[Nicktric]

I'm working on a house with lighting wired in singles from DB to loft and therefore no CPC, in the loft it is all in old T&E so CPC's to every point, the same downstairs. Zs, R1 R2 is fine down and up because at some point the cpc's have been connected to a single unbroken disconnected shower cable in black and red with a 2.5 cpc. The cable is terminated in a JB with the cpc out to a rose in the loft and at the DB, a 2.5mm in the MET with the 6mm just terminated and in the unit unconnected. Is this acceptable? If so should I leave it so in the DB so that an electric shower may be used in the future or should I terminate it outside the DB and just run the sleeved CPC into the MET? Or do I need to run T&E which would be tricky? Any advice appreciated! Thanks

 

[somersetsparks]

are the singles in steel conduit?

 

[Nicktric]

No they're not.

 

[somersetsparks]

Are the singles not in some form of conduit or trunking that you could just pull another earth in?

 

[somersetsparks]

Im not sure nicktric really, don't really do domestic, But I would think that if the shower cable is not in use, not in an mcb at the board then there would be no regs issue in using it as the earth.

 

[Nicktric]

Are the singles not in some form of conduit or trunking that you could just pull another earth in?

Not really but the 6mm shower cable follows the same route so kind of seems double the work? It would be the same result other than it is 2.5.