wiring practice with industrial installations.

[chris07]

Im a electrician, and work in domistic installation.
I've been ofered the job of rewiring a office building on a power station, when i've looked at the old installation the old lighting circuit has been partly removed and seams to have been wired as a lighting ring circuit with 2.5mm twin. Is this the normal wiring practice with industrial installations.

Cheers
Chris

 

[Shakey]

Absloutely not!!!!!!!

Only ring allowed is normal BS1363 socket outlet ring main, and CPC as a ring on a radial BS1363 circuit with high protective conductor currents.

definitely not lighting, industrial or otherwise.

good luck with the job

 

[Spudmiester]

Definitly shouldnt be a ring, but 2.5 may have been used because of voltage drop if its a large circuit or a long way from the DB. Possably 2.5 could have been spec'd for lighting circuits as some health authauritys I have worked for do this. 2.5 for ANY lighting circuit and 4 mil for sockets. I dont know how they expected someone to get 3 lots of 2.5 in the terminals of a light fitting though!

 

[KEVINDOE]

I have come across lighting circuits done in rings , twin and earth, loop in system, 1mm, on a newish property, i was dong a p.i.r at the time, confused.com !!!