Southwire 53171-SVTSS 4" Square Plenum Extension Ring, 2-1/8" Deep - Welded, W/Conduit KO's - Stainless Steel
Plenum extension rings are used in air-plenum wall or ceiling surfaces to install lighting fixtures, switches, receptacles or other outlet devices. Extension rings are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire.
Plenum extension rings are used in air-plenum wall or ceiling surfaces to install lighting fixtures, switches, receptacles or other outlet devices. Extension rings are added to junction boxes to increase wiring capacity and provide access for additional conduit runs and electrical wire.
