Insulated grounding conductor - 680

[ArcLazerbeam]

Is there any particular reason the code requires the grounding conductor to be insulated once the wiring method is considered outside? It's not a requirement for other outdoor installations. Are they afraid of rusting EMT????

 

[GoldDigger]

Is there any particular reason the code requires the grounding conductor to be insulated once the wiring method is considered outside? It's not a requirement for other outdoor installations. Are they afraid of rusting EMT????

Maybe because in a pool environment potential differences on the order of a volt can cause shock? Making contact with a grounding conductor that is carrying either fault current or unexpected neutral current a hazard?
Or maybe it is just corrosion in a chlorine rich environment, even in open air?

 

[big john]

...Or maybe it is just corrosion in a chlorine rich environment, even in open air?

That's got my vote. Pools are awfully tough on hardware. I would guess the insulation is an attempt to give the conductor a fighting chance.

 

[iwire]

I believe that requirement is all but going away in 2017.