EMT run exposed

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I have seen alot of rusty EMT on the front of buildings, not so much up high but down low, I think it may due to people throwing salt on sidewalks in the winter.
 
wallyworld said:
I see it all over in Maine(emt outdoors), looks fine to me. Do you see holes in the pipe from rust??
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Sometimes holes, usually just gone completely.

What do you consider a long time?

Exposed to the weather RMC will outlast EMT by a long shot.
 
I've put up a lot of EMT outside here in the Pac NW. Hold it off of the walls with back straps or strut and there is no problem.
 
I run it outside here in my constant foggy weather - not very many problems - but will say this - it lasts a lot longer if they paint it, and maintain that paint coating.
 
iwire said:
Sometimes holes, usually just gone completely.

What do you consider a long time?

Exposed to the weather RMC will outlast EMT by a long shot.
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20 30 years?? I've seen it on telephone poles, completely rust colored yet still whole. I agree RMC would last longer it also costs 5 or 6??( a stick of 3/4 rmc at Wesco distribution was 22 bucks in Bangor Maine last week) times more
 
How long is an electrical installation supposed to be good for?....Im sure not indefinetly....I thought I heard before that new construction had a "life expectancy" of 100 yrs......
 
Let the customer decided if it's not in a bid spec.. Customer chooses x amount of dollars vs xx amount with the understanding of potential rust in 20-30 years..
 
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