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smata67 06-08-2012 10:47 AM

Supporting NM-B
I'm going to install 1x4 runners at the bottom of joists in my basement to support 12/3 cable, rather than drill holes. How often do I need to support it along the runner?

Jim Port 06-08-2012 11:13 AM

At intervals no more than 4.5 foot apart and within 1 foot of any box with a clamp or connector. The cable would need to be secured within 8" if there is no clamp.

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