Ammo AR241, 4" Square Metal Electrical Box, MC BOX 2-1/8″ DEEP with “FB” BRACKET

Ammo Electric AR241 4" Square Metal Electrical Box – 2-1/8" Deep, FB Bracket, 30.3 Cu In

The Ammo Electric AR241 is a heavy-duty 4 inch square metal electrical box designed for professional, code-compliant rough-in installations. Featuring a 2-1/8 inch deep steel body, generous 30.3 cubic inch capacity, and an integrated FB side-mount bracket, this box is ideal for branching multiple circuits to lighting fixtures, switches, and receptacles in walls and ceilings.

Built from rugged welded steel, the AR241 electrical junction box includes both NM cable clamps and BX / MC cable clamps, allowing one box to handle armored cable, MC-I, MC-A, flexible conduit, and non-metallic sheathed cable. It is listed for 2-hour fire-rated wall installations, making it suitable for residential, multifamily, and light commercial environments.

Key Features & Benefits

• 4" square, 2-1/8" deep steel box – provides ample room for splices, pigtails, and multi-conductor runs
• 30.3 cubic inch capacity – reduces overcrowding and helps meet NEC box-fill requirements
• Welded steel construction – durable, impact-resistant, and jobsite-ready
• FB side-mount TS bracket – speeds up stud mounting and ensures correct flush depth
• Gauging tabs and recessed nailing spurs – faster, more accurate rough-in installation
• Supplied NM and BX / MC cable clamps – one box supports multiple wiring methods
• Multiple EKO knockouts – flexible conduit entry for clean, organized wiring layouts
• 2-hour fire-rated wall listed – suitable for rated corridor and separation walls
• Combination Phillips / slotted screws – convenient installation with standard tools

Typical Applications

• 4x4 electrical junction box for branching multiple circuits
• Metal box for lighting fixtures, switches, and receptacles
• Junction box for MC cable, BX cable, and flexible conduit
• Electrical box for residential, multifamily, and commercial rough-in
• Wall or ceiling installations requiring a steel, fire-rated junction box

Why Electricians Choose the AR241

• One box supports NM, MC, BX, MC-I, MC-A, and flex
• Deep 2-1/8" body provides room for safe splicing
• Steel construction delivers long-term durability
• Side-mount bracket simplifies new-work installations
• Meets code requirements for fire-rated wall assemblies

Installation Notes

• Mount to wood or metal studs using the integrated FB side-mount bracket
• Set box depth using gauging tabs to align with finished drywall
• Use included NM or BX / MC clamps based on cable type
• Select appropriate EKO knockout for conduit layout
• Follow NEC and local electrical codes for box fill and conductor count

Technical Specifications

The Ammo Electric AR241 is a dependable choice when you need a 4 inch square steel junction box that installs fast, holds more conductors, and supports multiple wiring methods. Built for electricians who value durability, flexibility, and code compliance.