There are only a few styles and sizes and i just keep one or two on hand.
Attic junction box under insulation.
And a steel box needs a steel cover plate.
Accessable attic junction boxes nec question ivoryring.
Remove inches of insulation from the ends of the black and the white insulated wires.
While there are no prescriptive prohibitions against covering junction boxes or electrical cables with insulation there is always the issue of heat buildup around any electrical device or wiring.
In the home energy 101 video philip drader show you how to seal th.
Blue plastic receptical switch boxes used as junction boxes.
You can attach them to the joist s side surface called the face or to the joist s top surface called the edge.
As i ve mentioned in past blog posts i hate having to look up anything in the national electrical code nec.
Junction boxes splicing romex.
To prepare your attic for insulation you need to draft proof any electrical boxes in it.
Junction box mounting locations there are two options for mounting boxes that are wholly contained within the attic.
You can t have a cavity with individual wires and wirenuts enjoying a view of the attic.
Mounting junction boxes in attic are both of these locations.
However your post mentions floorboards in the attic and i m not sure if you installed the junction box.
Since insulation is combustible you must install face plates on all attic junction boxes to prevent contact between bare wires and insulation materials.
The junction boxes that contain splices and are not accessible from the ceiling below should be exposed not covered by insulation.
Yes every box requires a cover plate.
Blank cover plates are readily available for less than a buck.
A lynn underwood a licensed contractor and building code official in norfolk va responds.
Also i happened across a great photo of a junction box buried by vermiculite insulation while looking through old photos for last week s blog post on vermiculite insulation.
According to article 314 29 of the nec junction boxes must be accessible without removing any part of the building if you consider insulation part of the building it shouldn t cover a junction.