The Gamewell-FCI E3BB-BB, B-size E3 cabinet backbox for control-board housing (PM-9, ILI-MB-E3, RPT-E3, DACT-E3). Black, 16-gauge steel.

B-size enclosure for control-board housing

B size measures 19.375 inches wide × 19.375 inches tall × 4.5 inches deep, sized for an E3 panel control assembly: PM-9 power supply, ILI-MB-E3 or ILI95-MB-E3 intelligent loop interface main board, RPT-E3 repeater, and optional DACT-E3 communicator. Inner-door slot count varies by inner-door SKU.

When B-size fits vs C or D

Pick B for standard E3 panel assemblies in commercial buildings. Step up to C (19.375 × 30 × 4.5) for INCC command-center configurations or INX audio transponder installations. Step up to D (19.375 × 41 × 4.5) when the build needs more inner-door slots, typically larger INCC or INX with more amplifiers and switches.

Construction

16-gauge steel backbox with mounting patterns for sub-assembly plates. Multiple knockouts for conduit access. Removable cabinet outer and inner doors. Inner-door bonding strap. Lexan window on the outer door. Keylock with quarter-turn latch. Backbox and door ground studs.

Seismic and listings

UL Listed S1869 under UL 864 10th Edition and UL 2572 2nd Edition. UUKL for smoke control. FM Approved 3025415. MEA FDNY COA# 6077. CSFM 7165-1703-0125. VMA Seismic Certified, IBC 2000-2013 and CBC 2007. ISO 9001 manufacturing.