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Old 05-02-2010, 08:50 AM   #1
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Supporting Romex

I'm running some 110v wiring from outlet to outlet exposed on concrete block in my basement. I have the galvanized clips to support it. How often are they required to be spaced? I know there is also another requirement to support it just before going into the box, what is that spacing? Thanks!


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Old 05-02-2010, 09:40 AM   #2
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8" to box,then every 4 ft. Try conduit?


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Old 05-02-2010, 04:09 PM   #3
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If the box has a connector, or built-in clamps, then the first strap can be up to 12" away. Type NM cable must be supported at least every 4 feet thereafter.


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Old 05-03-2010, 10:08 AM   #4
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Originally Posted by bobelectric View Post
Try conduit?
That's what I was thinking. Does code even allow NM installed exposed on concrete block (where it's easily reachable by the average person)? I thought NM cable had to always be protected in one way or another... either burried in a wall, or surface mounted to some place not typically accessed (like a crawl space or attic) or up out of reach in an exposed basement?
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Old 05-03-2010, 10:45 AM   #5
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Originally Posted by bobelectric View Post
Try conduit?

If you run a long distance in conduit, you should use THHN/THWN wire (individual black, green, white) instead of romex. I think the rule is that for a short run, you can put romex in conduit to protect from damage, but over a longer distance run, it should be individual strands.

Do I have that right?

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Old 05-03-2010, 12:09 PM   #6
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As long as the conduit is sized large enough for the romex it is OK & meets code

(3) #12 THWN need 1/2" conduit
(1) 12-2 cable (.450") will also fit in 1/2" & meet code
But the 12-2 will be a PAIN to pull thru any distance
I sleeved 12-2 UF in ~8' of conduit to go into a storage area junction box
From there I went with THWN in the conduit

I did not want a complete run of conduit back to the sub - also a pain


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