Leviton – Single and Dual-Gang Low-Voltage Surface-Mount Back Boxes (42777 Series)

Single- and dual-gang low-voltage surface-mount back boxes in two depths (1.45″ and 1.89″); compatible with Leviton QuickPort and MOS wallplates; available in white, ivory, gray, and black; UL 94V-0 fire-retardant plastic.

Categories: Leviton, Products

Leviton single- and dual-gang surface-mount back boxes provide a durable, code‑compliant enclosure for low‑voltage connectivity in hard-wall or open-office environments. Two-piece construction includes a removable base, multiple side and rear cable access knockouts sized for bend radius, and tie‑wrap anchors for cable and fiber storage. Boxes accept NEMA-compliant flush-mount plates, Leviton QuickPort™ and MOS wallplates, and accommodate common raceway types. Available in shallow (1.45″) and deep (1.89″) depths and four colors to match installations.

Key Specifications

Materials: Fire‑retardant plastic rated UL 94V‑0.
Depths available: 1.45 inches; 1.89 inches.
Colors: White, Ivory, Gray, Black.
Mounting: Screws and adhesive tape included; optional magnet retention (part 41030‑SMJ) supported.
Standards / Listings: UL Listed (Communications Circuit Accessory 1863); CSA Certified; ANSI/TIA‑568.0‑D compliant.
Country of Origin: Mexico.

Part Numbers

Single-Gang, 1.89″ deep: 42777-1WA (White); 42777-1IA (Ivory); 42777-1GA (Gray); 42777-1EA (Black)
Single-Gang, 1.45″ deep: 42777-1WB (White); 42777-1IB (Ivory); 42777-1GB (Gray); 42777-1EB (Black)
Dual-Gang, 1.89″ deep: 42777-2WA (White); 42777-2IA (Ivory); 42777-2GA (Gray); 42777-2EA (Black)
Dual-Gang, 1.45″ deep: 42777-2WB (White); 42777-2IB (Ivory); 42777-2GB (Gray); 42777-2EB (Black)

Design Considerations & Installation Notes

Suitable for category-rated data cabling and low-voltage connectivity.
Single-gang base can be mounted over existing single-gang handy boxes or low-voltage brackets.
Dual-gang base can be mounted over single- or dual-gang boxes using appropriate reducers.
Provide cable support near installed box as required by local practice; use provided tie-wrap anchors for neat routing.
Optional magnets (41030‑SMJ) sold separately for magnetic mounting.

Warranty & Support

For Leviton product warranty details and support information, visit: and .

Product Specification

Features & Benefits

Works with Leviton ecosystem: Compatible with QuickPort™ and MOS flush-mount wallplates and other Leviton single- and dual-gang wallplates.
Flexible cable access: Rear and side knockouts sized to protect cable bend radius; side breakouts accept Wiremold and Panduit raceway or equivalent.
Internal cable management: Tie-wrap anchors at each inside raceway entry; dual-gang includes four fiber storage tie-wrap anchors on base.
Multiple mounting options: Mount over existing handy boxes or low-voltage brackets; optional magnet retention for non-destructive surface mounting.
Two depths: Choose shallow or deep version to suit device depth and conduit/raceway requirements.
Durable construction: High-impact, fire-retardant plastic (UL 94V‑0) for safe, long-lasting installations.