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cliffed

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taking over a job from a old sparkie,really nice jobby,trunkin & conduit,biggest warehouse.Wots your feelin on this,cos just had a mighty row wiv him.3 lighting circuits cabled in 2.5mm,quite a long run,switching low bay lighting in 3 rows,via 2 2way switches & 1 intermeddiate.At the switch position there shud of been 3 earths to match the 3 circuits,but no,the earths stop at the lighting points,& 1 earth is then taken from a circuit 2 the switch,this happens at all switch positions,so wot do u think.Major problem now is gettin the relevant earths 2 each switch,cos 25mm conduit full 2 the brim,my gaffer thinks it may b ok,but he wud.
 
I take it this is all wired in singles ? As far as I understand it this is fine, it's definately the way I got taught to wire singles in containment . I can't point you to a reg but as long as there is an earth accompanying live conductors in every section of containment, an earth at every accessory, and every metal acessory is earthed then it is how it needs to be.

I may be wrong so I stand open to advice and correction.
 
2x2w & 1x int. ? is the intermediate switch in the middle of one of the circuits ie.near an exit door,would have thought 3 rows of lights = 3 switched circuits also if the 25mm conduit is full what else is in it
 
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