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Old 11-02-2012, 03:28 PM   #1
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Metal outlet box in attic space grounding


I have an unfinished attic space I am going to run a new leg to for an electical outlet in the attic... already have this setup to be an AFCI breaker since it is an attic space, 12 gauge wire on a 20 amp circuit to a single gang metal box.


Do you have to bond the ground wire to the metal box or is going to the outlet grounding screw only enough since it technically grounds the metal tabs you screw to the box also?


Any other code issues I might need to account for in adding a single outlet to an attic space?


thanks!

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Old 11-03-2012, 11:11 AM   #2
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Metal outlet box in attic space grounding


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Originally Posted by BlueBSH
I have an unfinished attic space I am going to run a new leg to for an electical outlet in the attic... already have this setup to be an AFCI breaker since it is an attic space, 12 gauge wire on a 20 amp circuit to a single gang metal box.

Do you have to bond the ground wire to the metal box or is going to the outlet grounding screw only enough since it technically grounds the metal tabs you screw to the box also?

Any other code issues I might need to account for in adding a single outlet to an attic space?

thanks!
Black to brass screw of receptacle

White to silver screw of receptacle

Ground first wired to a grounding screw connected to metal box, then to the ground terminal of the receptacle

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Old 11-03-2012, 11:22 AM   #3
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Metal outlet box in attic space grounding


The box needs to be bonded independently of the device. The mounting screws do not count as a bonding means for the box.
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Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
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Old 11-03-2012, 05:27 PM   #4
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Metal outlet box in attic space grounding


If it is truly a single receptacle outlet alone on a 20 amp circuit, you must use a 20 amp receptacle. If it is a duplex receptacle, you can use a 15 amp receptacle.
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