Horizontal Weatherhead

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Mike Scarry

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Roanoke, Virginia
Is there an NEC violation when using a weatherhead on conduit in the horizontal position? I looked in Art. 230, and all I could find were requirements that fittings be placed so as to prevent moisture from accumulating (314.15, referred from 230.54(B)), that service heads be above the point of attachment (230.54(C)), and that drip loops be formed/conductors be arranged so that water would not enter the raceway (230.54(F)/(G)). I could not find anything specifically prohibiting a weatherhead in the horizontal position. Just wondering if anyone knew anywhere else in the NEC (2008) that specifically prohibits this practice. I am also checking with local POCO and with manufacturer to make sure this is a listed application. Thanks in advance!
 
I have seen it done many times, but never had to do it myself, Most of them tilt the head down some, and with the drip loop below it. I suppose it would be sufficent to keep the rain out.
 
The issue would be the listing of the weatherhead and in what position that it still maintains it's wet location listing. If I had to guess I would say that if it were aiming down then it would be fine. For SE cable that would be a different story.
 
I've installed them under eaves and that nearly, if not altogether, eliminates water from entering the conduit.
If I was to install one on an open wall, I'd seal the back (formerly bottom) edge of the weatherhead where it meets the pipe.
That's why they make silicone RTV.
 
I have done a few that way, if I have to go up from meter base & 90 over to corner. Did 1 not long ago. Never had 1 questioned by an inspector.
 
I've seen a few of those, every time I seen them was a conduit going vertical, then bent to clear the roof canopy.
If that's the case I would say it violates the 2' (or so) required for the riser to be above the roof.

Mike Scarry said:
Is there an NEC violation when using a weatherhead on conduit in the horizontal position? I looked in Art. 230, and all I could find were requirements that fittings be placed so as to prevent moisture from accumulating (314.15, referred from 230.54(B)), that service heads be above the point of attachment (230.54(C)), and that drip loops be formed/conductors be arranged so that water would not enter the raceway (230.54(F)/(G)). I could not find anything specifically prohibiting a weatherhead in the horizontal position. Just wondering if anyone knew anywhere else in the NEC (2008) that specifically prohibits this practice. I am also checking with local POCO and with manufacturer to make sure this is a listed application. Thanks in advance!
Click to expand...
 
Nothing like looking out the kitchen window doing dishes and viewing the service head

Nothing like looking out the kitchen window doing dishes and viewing the service head

I've seen it where they do a 90 to get the drip loops above a window so they don't have to penetrate the roof OR get it above 10 feet.:dunce:
 
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