Nonmetallic sheath

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hhsting

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I know had same post posted but got closed without any response to question in this thread. That left me more confused.

I have indoor subpanels in apartment complex dwelling unit which has cable UF branch circuits going to attic of the apartment complex and then coming down at the balcony outdoor of the dwelling unit where the condensing unit is.


1. 340.10(4) says where installed as nonmetallic sheathed cable it need to be protected.. in the above scenario is it installed as nonmetallic sheathed cable or not? How does one know?
 
Your question was answered pretty well o the other thread.

I think some continuing education would do you a world of good.

Start with Electrical wiring commercial, and electrical wiring residential, both from Cengage I believe.
 
hhsting said:
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1. 340.10(4) says where installed as nonmetallic sheathed cable it need to be protected.. in the above scenario is it installed as nonmetallic sheathed cable or not? How does one know?
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If the UF is being installed inside a building, it is being installed as NM.
 
I just saw the other thread and believe I understand your confusion.

Code says that you may not use this cable if subject to physical damage.

The common interpretation of this is that if you provide suitable protection, then the cable is not subject to physical damage. Common protection measures include conduit, building a wall, using non electrical pipe, etc. The point being that the region inside of a protective element is a place not subject to physical damage.

The other interpretation is that if there is a location that is 'subject to physical damage ' then you can't use this cable, period. IMHO this is a bad interpretation because it essentially prohibits this cable everywhere. Before you build the wall you have an unprotected space!

Jon
 
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