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Old 06-08-2012, 11:47 AM   #1
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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?


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Old 06-08-2012, 12:13 PM   #2
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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.


Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
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