Southwire TBX-135 One Gang Masonry Box Extension, 3-1/2" Deep - W/ Conduit KO's
Masonry box extension rings are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire. Extension rings prevent the need to remove old conduit boxes and wiring from circuits when additional capacity is needed.
Masonry box extension rings are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire. Extension rings prevent the need to remove old conduit boxes and wiring from circuits when additional capacity is needed.
