Nec 230.24 A overhead clearance above a roof

[Jpflex]

I have never seen a service or feeder 8' 6 inches ABOVE a roof surface.

The way nec words things is rediculous. if this were the case we would need risers and mast over 8 feet 6 inches ABOVE esidential roofs.

Its not clear wat nec is saying but ill say a 10 foot clearance from accesable grade to the service or feeders attached to a building with only pedestrians would work under most situations

 

[augie47]

Almost all residential installations would meet one of the exceptions.

 

[Jpflex]

Almost all residential installations would meet one of the exceptions.

When would you see a riser 8'6" above a roof and if there are so many exemptions to this and its not likely ever seen whats it doing in the code?

 

[retirede]

When would you see a riser 8'6" above a roof and if there are so many exemptions to this and its not likely ever seen whats it doing in the code?

Basically, when you have a flat roof.

 

[Jpflex]

Basically, when you have a flat roof.

I still never seen this on flat roofs. However, i still dont get the riser code. What is meant by maintaining riser hight clearance 3' . I only helped install a riser once and years ago.

What is an earier way to understand riser installs without necs terrible wording?

 

[retirede]

I still never seen this on flat roofs. However, i still dont get the riser code. What is meant by maintaining riser hight clearance 3' . I only helped install a riser once and years ago.

What is an earier way to understand riser installs without necs terrible wording?

If the service drop is attached to the side of the building, none of this applies. See exception 4. This is probably what you are used to seeing.

The words “riser height clearance” don’t appear anywhere in this section:

 

[ramsy]

If the service drop is attached to the side of the building, none of this applies.

Did I read that right, that none of this applies If voltage is under 300 ?

 

[AC\DC]

Did I read that right, that none of this applies If voltage is under 300 ?

That applies to all resi and what pretty much all commercial.

Op was talking about resi roofs

 

[curt swartz]

We have installed many tall masts to allow 8' clearance over low pitched roofs. Its usually because the drop runs over a low pitched porch or patio roof. Sometimes it runs over a detached garage roof.

Does anyone know why 2023 changed 8" to 8'6"? It has been 8' as long as I have been involved in the trade.

Most service drops are installed and owned by the utility so technically the NEC doesn't apply but good luck getting the local AHJ to agree.