Weatherhead height

[control4it]

To be in compliance with the 2005 NEC, how high does the weatherhead need to be above the roof-line of a residental home?:-?

 

[ultramegabob]

To be in compliance with the 2005 NEC, how high does the weatherhead need to be above the roof-line of a residental home?:-?

the weatherhead doesnt have to be above the roofline...

 

[control4it]

Is there any min. height that the weatherhead needs to be above grade?

 

[augie47]

the weatherhead doesnt have to be above the roofline...

but, if it is, there is no "quick" answer. You really need to look at 230.24 as there are a number of varibles which make the correct answer anywhere from 18" to 8 ft.

 

[augie47]

Is there any min. height that the weatherhead needs to be above grade?

the weatherhead should be at or above the point of attachment, and since the minimum clearance for overhead conductors is 10 ft., the answer, I believe, is 10 ft. (230.26 somewhat confirms this)

 

[control4it]

Is the weatherhead height based on height above grade?

 

[ultramegabob]

you need enough height on your service mast to get proper clearance for the service laterals.

http://www.cinergy.com/customerprojects/elecservmanual_sec300.htm

 

[la2151]

weaather head height

weaather head height

HI.. I am in the sunny state of Calif & as we have PG&E. They require the minium to be 13' to the bottom of the head off finish grade.. Just some info from here. so? maybe check with the local poco to see what they reqire.

 

[augie47]

Is the weatherhead height based on height above grade?

I would think, normally, yes, that would be the reference.
but, obviously, not necessarily so. I picture a weather head on top of a riser on a penthouse built on top of a 4 story parking garage
now 60 ft above grade.

 

[wbalsam1]

also, allow for drop conductor sag. The low point should comply with 230.24(B).

 

[quogueelectric]

These numbers are nec and not necesarily poco.
This was a trick question on my masters exam they showed a picture of poco clearance 15 ft is the poco answer yet the question clearly stated what was the nec minimum which was 10.
I got it correct but it pissed me off that they asked trick questions on the masters exam hey what are they trying to prove here. Why show the poco picture right out of the book and then ask for something else. Jerks in my opinion.
To answer your question The poco by me I think needs 3' to the point of attatchment which is 6" to 12" below the weatherhead so about 4' by me if it is through the roof.
You can find most poco install manuals online now in pdf format

 

[Chamuit]

Our clearance requirements are similar to yours U-Bob.

The weatherhead has to be located above the minimum clearance for the conductors. Whether that is above the POA or not could be beside the point. I have seen POA's that were equal in elevation and above. The critical issue then would be a proper formation of a drip loop.

 

[frizbeedog]

Is the weatherhead height based on height above grade?

Yes. Or...height above a platform....Or...The serving utility may have a requirement above the NEC requirement.

Or....There is no simple answer. :smile:

 

[charlie]

In order to comply with the NESC (California has their own Code for the electric utilities), you are required to clear the pedestrian areas by 12 feet with a cabled (triplex) service drop (This includes the drip loops). There are exceptions for some types of construction.

230.24 is written for customer owned service drops, not electric utility owned service drops. The rules are different in the NEC and NESC and it depends on who owns the service drop.