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Fire Stop Box
and Cover Guards
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FIRESTOP BOX GUARDS
NSi FireStop Box Guards are one component fire rated pads
made of highly intumescent firestop material for use in
electrical boxes. They are inserted in the box and adhere to the
inside back wall. NSi FireStop Box Guards are easy to install
and very cost effective. When exposed to fire they expand,
forming a char that will seal off the opening, prevent the
spread of fire and limit the temperature rise on the unexposed
surfaces. When used as directed, the horizontal separation
between outlet boxes on opposite sides of the wall may be
less than 24 inches, provided that the boxes are not back-toback.
NSi FireStop Box Guards are classified by UL under Wall
Opening Protective Material as found in the Fire Resistance
Directory. Available in two sizes to suit single and double
boxes. STC Rating 55.
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FIRESTOP COVER GUARDS
NSi FireStop Cover Guards are one component fire rated
gaskets made of highly intumescent firestop material for use in
electrical boxes. They are mounted on the inside of the cover
plate and installed at the same time as the cover plate. When
exposed to fire they expand, forming a char that will seal off
the opening, prevent the spread of fire and limit the temperature
rise on the unexposed surfaces.
NSi FireStop Cover Guards are easy to install and very cost
effective. Excellent for use when addressing the 24 inch rule.
They are used when electrical boxes are installed in rated walls
facing opposite directions and horizontally separated by less
than 24 inches. They can also be used as a solution for standard
electrical boxes when the 100 square inch rule is violated.
Exceptional for safe, retrofit applications. Can be used for both
metal and plastic cover plates.
NSi FireStop Cover Guards are available as single switch,
double switch, single receptacle, single décor and double
décor.
An economical alternative to putty pads. STC Rating 54.
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