Submitted by Frank Cinker Pittsburgh, PA E-mail CinkerF@cs.com
"A new 200 Amp Service did not pass electrical inspection. The conductors were too close to window. McGRAW-HILL'S NEC handbook indicate service drop conductors. NEC section 230.9 states service conductors. Does this code section apply to service entrance conductors or service drop conductors?"
Frank, The code section uses the words "service conductors" so in my opinion it applies to both service drops and service entrance cables. Is that window designed to be open? If not there is no violation in the current code. I would like the 3' restriction to apply to all windows, not just those designed to be opened, but that's not what 230-9 says. Any overhead drops near windows interfere with the placement of fire service ladders in the event of a fire. Don(resqcapt19)
Re: Service Drop or Service Entrance Conductors?#112049 02/05/0102:18 PM02/05/0102:18 PM
Don, The window is designed to be opened. NEC handbook (McGraw-Hill, 1999) seems to indicate both in words and photo that section 230.9 applies to service drop conductors. When in doubt I suppose the current NEC book should used instead of a NEC Handbook.
Re: Service Drop or Service Entrance Conductors?#112050 02/05/0102:38 PM02/05/0102:38 PM
I would say that 230-9 is referring to both, in that it addresses the conductors without an overall covering, which would be the Conductors coming out of the Service head and the Triplex from the pole. Since they both (service drop and service conductors) extend to the point of splice, the drip loop would also have to be included.
In the 1990 NEC Handbook (sorry, I don't have a more recent one) It talks of including the drip loop in the clearance requirements. There is even a picture of the drip loops also being above the Window to meet the exception requirements.
If I can get my scanner working I will post a picture.
I hope this helps,
Re: Service Drop or Service Entrance Conductors?#112052 02/06/0102:37 AM02/06/0102:37 AM
You are correct concerning NEC Handbooks. However, they are a very useful. I usually purchase the McGrall-Hill and the NFPA code handbooks each new NEC edition. It's a little expensive but for me it's worth it.
Re: Service Drop or Service Entrance Conductors?#112056 02/06/0101:35 PM02/06/0101:35 PM