I would like to mount a floodlight on my chimney. I'm not keen on cutting into the roof there to make an entrance for the wire. Every hole in the roof is an opportunity for water intrusion and it's also above a vaulted ceiling – access is difficult and there is nothing to tie into there.
Would it be ok to let the power cord lay on the roof and run around the eaves, perhaps to a high mounted in-use box? It doesn't seem great – don't anyone tripping or slipping on the cord.
I'd like to hear your thoughts on this.
Best Answer
I am going to post a contrarian answer and will welcome any correction.
Flexible cords are covered in article 400 of the National Electrical Code. There are uses not permitted in section 400.8:
Now think about (1) above. At first glance it looks discouraging; but consider that if that rule ruled out all use of flexible cords, this would be a very short article. It's actually not really that clear what (1) means, but it doesn't mean that flexible cords and cables can never be used.
If you look at 400.7, it lists permissible uses of flexible cords and cables:
Now to me (2) above sounds promising, doesn't it? Does your light qualify as a luminaire? The NEC does have a definition for "luminaire" in Article 100:
This is not surprising to me. For example, in warehouses, it's a common practice to make up a cord and plug connection for the highbay lights up in the rafters. This is done to make maintenance (installation / removal) more convenient. It's a generally accepted practice. The highbays are certainly not portable or frequently moved.
Many outdoor lighting products would, to my read of this, clearly qualify as "luminaires."
Note that 400.8(4) would seem to discourage you from attaching the cord to the building surface, including the roof.
The "subject to physical damage" restriction in 400.8(7) is always subjective. I would say that a cord laying on a pitched roof, no foot traffic etc., is up out of harms way and not subject to physical damage.
The cord you'd use would have to be rated suitable for the environmental conditions, there's no getting around that. The question is, would say SJEW cord, which is rated for extreme hard use (that's what the E means), and to outdoor wet locations where exposed to sunlight and rain (that's what the E means) is suitable for the environmental conditions.
So with all that said, I think I have made a good argument that you could use a cord grip to mount the cord to the light, run plug terminated SJEW cord a short distance to a (preferably twistlock) receptcacle on a GFCI protected circuit, with an in-use cover, located under in the soffit or on the fascia.
An inspector could see it either way. I think the most tenuous part of the argument is the "subject to physical damage" part.