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Fire Resistive Wall and Ceiling Ratings
Frequently Asked Questions
CEYY.R9379 Outlet Boxes and Fittings Classified for Fire Resistance

FiberglassBOX™: Fire Resistive Ratings

To the electrical contractor, wall space is at a premium. Allied Moulded's fiberglass reinforced polyester (FRP) electrical boxes give you the freedom to make the most of your space, with an exclusive industry fire rating, backed by UL® testing, that bucks the installation limitations found in 2-HR fire resistive walls. Our fiberglassBOX™ series of FRP wall boxes—up to and including three-gangs—can be safely mounted in opposing walls within a mere three inches of each other in all U300 wall configurations. Their PVC and metal counterparts can't get closer than two feet of each other without additional protection and cost! Plus, these FRP boxes require no additional fire protection, like putty pads, mineral wool or insulations, whose costs in both materials and labor can really add up, especially in multi-family homes. And since multiple boxes are placed in a single cavity, you can significantly reduce the amount of nonmetallic sheathed cable required—saving you even more time and money.

Other fiberglassBOX™ product feature topics:

Sound Transmission Class Rating
Vapor Seal - Energy Star Home Products