Containment choice for small commercial units.

[Knobhead]

I'm begining to worry about you and your nail polish old mate.

All the conduit work I’ve done was in plants built in the 1930’s, I was taking out old Reyrolle HH switchgear and replacing it with GE MiniForm. I wasn’t having my work criticised by the old guys, it became a matter of pride. I even had to learn to do paper lead cables as some of the new gear used the old cables.

 

[somersetsparks]

when doing trunking/conduit do you fit lockrings on couplings or not? do you fit serated washers or not? its normal practice in scotland to fit lockrings but not by english firms WHY?

On our firm lockrings behind bushes has always been standard mate, as spinlondon pointed out bushes are pretty feeble and have no surface area, if you fit them without a lockring you can sometimes see light through the joint, especially on knockouts.
Well I always do it and im glad to hear others do as well!

 

[Knobhead]

It’s purely good workmanship! The more surface area the better the conductivity. Not rocket science INIT!