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#194479 - 06/04/10 05:08 PM Surface wiring across driveway
wewire2 Offline

Registered: 11/14/02
Posts: 246
Loc: California
I have a client that wants to park an RV on the other side
of a Storage facility driveway. He wants the 50 amp RV circuit to run surface across the driveway from the building with available power and he wants to use a cable ramp. Never been asked this one before and he wants the price right away. I'm wondering if a UL listed ramp is available to protect rigid conduit. RV's will be driving over it frequently.Anyone familiar with an approved ramp or have any suggestions besides going underground or overhead?

2014 / 2011 NEC & Related Books and Study Guides
#194482 - 06/04/10 05:28 PM Re: Surface wiring across driveway [Re: wewire2]
Tesla Offline

Registered: 06/16/04
Posts: 1280
Loc: Sacramento, CA
IMC is better than RMC...

Such protection is pretty effective for temp power at construction sites.

In such usage our idea of a cable ramp is 2x6 lumber....

Grainger might have something suitable.

#194484 - 06/04/10 08:58 PM Re: Surface wiring across driveway [Re: Tesla]
KJay Offline

Registered: 11/27/07
Posts: 763
Loc: MA, USA
The company in the link below makes a protector ramp suitable for that purpose, but I don't think it would be required to be UL listed, since it is not an actual fitting or part of the RMC wiring method.
I wasn't able to locate anything in the White Book pertaining to protector ramps.


#194488 - 06/04/10 11:14 PM Re: Surface wiring across driveway [Re: Tesla]
wewire2 Offline

Registered: 11/14/02
Posts: 246
Loc: California
Haha! Yeah I'm familiar with the 2x4 method. Heck I've seen
cords running across heavily traveled roads without
protection. Thanks for the responses. I think I'm going to
propose just installing an outlet and let him worry about protecting it across the road. Less liability to worry about.

#194494 - 06/05/10 07:58 AM Re: Surface wiring across driveway [Re: wewire2]
HotLine1 Offline


Registered: 04/03/02
Posts: 6792
Loc: Brick, NJ USA
Last I looked, Grainger had ramps made by Hubbell for cord protection, & suitable for traffic crossing. Hold your wallet....they were in the $400 range I think.

#194500 - 06/05/10 03:42 PM Re: Surface wiring across driveway [Re: HotLine1]
wewire2 Offline

Registered: 11/14/02
Posts: 246
Loc: California
Looking at NEC 400.7 and 400.8 and wondering whether a
cord laid out for a weekend or two a month across the drive and protected by a ramp would sneak in under the provisions listed. An RV is portable right? Opinions?

#194515 - 06/06/10 10:37 AM Re: Surface wiring across driveway [Re: wewire2]
renosteinke Offline
Cat Servant

Registered: 01/22/05
Posts: 5305
Loc: Blue Collar Country
I don't see a problem ... nor do I see a problem with any means used to help protect the cord.

Indeed, some time back I posted pics of such a cord thaqt was run through a garden hose. In that instance, the cord went across a parking lot for a 'sale' event.

The world generally has no problems with honest applications; it's when that RV sits in place for a decade and is rented out as an apartment that code officials start getting grumpy.


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