equipment grounding conductors [RE-wrenches]

[Drake Chamberlin]

Hello Wrenches, 

NEC 250.118 lists equipment grounding conductor types.  EMT is one type 
of equipment grounding conductor that is listed.  

To be on the safe side, we usually run a wire in EMT, from the solar 
array, that is rated at 125% of full load current per 690 requirements.  


The NEC Handbook gives some idea concerning what size that rigid metal 
conduits are permitted for equipment grounding, for various amperages in 
feeders, although the NEC itself doesn't.  

In the past, I used EMT conduit to ground runs from solar arrays, the 
same way that I use the pipe to ground other circuits.  Can we still use 
it?  What are the guidelines for determining what amperage or wire size 
is allowed to be grounded in this way. 

Thanks,

Drake 


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