Battery Rooms and EMT

[JoshuaBeverly]

In NFPA 70E it has a reference to "Foreign piping" when you look under battery room requirements. What is the definition of a "foreign pipe"? Also, if you have EMT in a battery room already and they are feeders to other rooms of the building, is it lawful not to make them corrosive resistant? Do these pipes count as "foreign piping"?

 

[charlie b]

I don't know about the EMT part of your question. But to me, "foreign pipe" means something not related to the electrical equipment in the room. A drain in the floor of the room above, with the drain pipe running through your room, would count as foreign. So too would a set of hot and cold water pipes that serve a bathroom next door to your room. By contrast, if you have a small, in-room air conditioning unit that provides cooling to the room (I think it is called a "CRAC"), pipes related to the operation of that unit are not considered foreign.

 

[tom baker]

EMT is not pipe, its tubing. Pipe is a plumbing term...if that helps.