DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Electrical and Wiring > Nm-b romex run outdoors




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Old 11-29-2012, 12:16 PM  
Wuzzat?
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Originally Posted by nealtw View Post
Then the question is: "Can NMB be used in an unconditioned space?" If the cable sees more than 30C you might need to derate.
Wouldn't that be the same as an attic with a moisture problem.
Yes, unless the cable has some kind of cognition that we do not and can not know about (see Emergence).
Always a pleasure, nealtw. . .


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Old 11-30-2012, 01:13 PM  
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Then the question is: "Can NMB be used in an unconditioned space?" If the cable sees more than 30C you might need to derate.
Wouldn't that be the same as an attic with a moisture problem.
Seems damp to me.
http://www.paramount-lighting.com/wet_locations.pdf


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Old 11-30-2012, 02:13 PM  
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I think the smaller cables should be run thru holes in the joists too.

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Old 03-06-2013, 01:54 PM  
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My uncle has a log cabin that he gave to me and it was built back in the 40's. Since he's was an industrial electrician he redid the electrical in 1990 because of few plugs and knob and tube wiring. In order to avoid so many wires running along the wall he decided to drill through the floor and run the wire under the cabin to the next plug, switch, or if its a home run line. I looked under the cabin just recently and he just ran the romex loosely and it's laying on the ground. It doesn't look deteriorated or chewed. Some circuits close to the panel he just stapled the cable real nice and neat along the wall or ceiling. All junctions have covers and romex clamps on all boxes. All cables are stapled within 6" of fixture and stapled every 12". Also he put in some outdoor lighting on the porch and he just drilled through the logs from the inside and just ran romex out to the light. Is this acceptable by code? My uncle is not around anymore so I can't ask him. Any info would be appreciated.
If you ever replace this cable you would need to use the UF-B product Romex ®NM-B cable. It is permitted to be used “for both exposed and concealed work in normally dry locations” per NEC® 334.10(A)(1) and not permitted in “damp or wet” locations per NEC 334.12(B)(4). Any cable lying on the ground needs to be supported. - The cable needs to be supported and secured every 4’ and within 12” of each box, cabinet, conduit, or other termination. NEC 334.30(A)
This answer is intended to apply to Romex® Brand NM Cable. For other NM cables, please check with those respective brand suppliers or cable manufacturers. Romex® is a Registered Trademark of Southwire Company.
This communication is for general informational purposes only and is not intended to constitute advice. As all the facts and circumstances in any given situation may not be apparent, this communication is not intended to be, and should not be, relied upon by the reader in making decisions with respect to the issues discussed herein, and the reader assumes the risk if he or she chooses to do so. The reader is encouraged to consult an expert before making any decisions or taking any action concerning the matters in this communication. All warranties, express or implied, including warranties regarding accuracy, adequacy, completeness, legality, reliability, safety or usefulness of any information, ARE DISCLAIMED. Southwire Company is not liable for any damages however caused and on any theory of liability arising in any way out of the information provided or the reader's use of it.
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Old 03-06-2013, 02:24 PM  
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Hey Romex: Welcome, great info until you dropped your lawyer on us. All that legal stuff is understud here

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Old 03-06-2013, 09:37 PM  
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How nice to have you very own cabin!

If you are running conduit, you need stranded wiring, not UF or ROMEX sheathed. Heat builds up and so code requires strands. UF can be undergrounded but the aboveground stubs should be in conduit until you hit the required depth in the dirt (prevents critter gnawing on live wiring).

In California, we are required to bury UF or conduit a minimum of 14" below ground (which is exactly what I did today, BTW).

Here is a resource for you to consider: http://www.familyhandyman.com/DIY-Pr...cable/View-All

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Old 03-08-2013, 12:25 AM  
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Quote:
Originally Posted by CallMeVilla
How nice to have you very own cabin!

If you are running conduit, you need stranded wiring, not UF or ROMEX sheathed. Heat builds up and so code requires strands. UF can be undergrounded but the aboveground stubs should be in conduit until you hit the required depth in the dirt (prevents critter gnawing on live wiring).

In California, we are required to bury UF or conduit a minimum of 14" below ground (which is exactly what I did today, BTW).

Here is a resource for you to consider: http://www.familyhandyman.com/DIY-Pr...cable/View-All
What code is that exactly?!
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Old 03-09-2013, 06:25 PM  
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Well, wireless, you can start here and follow the NEC ....
http://electrical.about.com/od/codes...iring_tips.htm

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Old 03-10-2013, 12:44 AM  
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Well, wireless, you can start here and follow the NEC ....
http://electrical.about.com/od/codes...iring_tips.htm

Really the NEC requires stranded wire in conduit?
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Old 03-10-2013, 02:40 PM  
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In case you did NOT read the very helpful article from The Family Handyman I provided, here is the pic for buried plastic pipe wiring ... Note also the more shallow undergrounded wiring is encased in metal conduit .... BUT BOTH are done without the ROMEX sheathing.



underground.jpg  
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