How to secure Romex?

Old 10-11-14, 10:31 AM
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How to secure Romex?

I want to add a new outlet in daughter's utility room. Bedroom behind wall has an existing outlet. When I open the existing old metal box, I see the knockouts in the rear. Will use Romex.

Once I knock out a knockout and thread the Romex, how do I secure the Romex at the old box?

Old 10-11-14, 10:59 AM
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Use a push in NM-b (Romex) connector.

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Old 10-11-14, 12:10 PM
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Some metal boxes will have clamps built into the box.

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