best way to install a heavy vanity light

per08September 21, 2009

I am installing a new vanity light. It has three bulbs. It is pretty heavy, about 6.5lb without bulb. I am afraid it is too heavy for a plastic electric box. I want to minimize the drywall damage. Right now I am thinking of three options:

1) mount the light onto the stud, dig a small hole in the drywall near the stud, and connect the wires inside the compartment of the light.

2) use the adjustable all-metal electric box: MB120ADJ

It has a metal tab and can be mounted at the stud. It think it is pretty strong

3) mount the light onto the stud, and install a old work plastic electric box nearby for wire connection. The electric box can be covered by the light compartment.

Which is the best solution?

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6.5 pounds is not heavy. 65 pounds is heavy.

    Bookmark   September 22, 2009 at 8:26AM
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Ron Natalie

6.5 isn't comparatively heavy, but it may be more than a lot of old work mountings can handle on drywall. The plastic ones with more substantial flip out wings will fare better than the bendy tab metal things.

A toggle bolt or hitting the stud in addition isn't a bad idea.

    Bookmark   September 22, 2009 at 8:37AM
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6 lb is the limit for the old work plastic box. See the last sentence at the last page of

I plan to mount the light directly onto the stud without any box. Then I will not worry it would fall down someday. Is there any concern in terms of wiring?

    Bookmark   September 22, 2009 at 11:48AM
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The only concern would be if the fixture is rated as a junction box to allow connections to made within the fixture thus not requireing a junction box.
Does the fixture have knock out where a cable clamp can be installed? If not then a box may be required.

    Bookmark   September 22, 2009 at 12:53PM
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I don't think the fixture is rated as a junction box. It has no knock out. Can I use wire staples to secure the wire on the stud?

    Bookmark   September 22, 2009 at 3:12PM
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All connections MUST be made in a box. If the fixture is not rated as a box then you must install a box. The fixture can still be mounted to the wall for support.

    Bookmark   September 23, 2009 at 8:19AM
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I plan to use a metal pancake outlet box, which can be mounted at the face of 2x4 directly.

    Bookmark   September 25, 2009 at 2:40AM
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