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Galvanized steel single-gang electrical box with knockout clamps, gray finish

Hubbell Incorporated

Hubbell Incorporated RACO 531 Electrical Box 12.5 cu in 1 Gang

SKU CH-TJEB-13SW0

A 12.5 cu in single-gang steel switch box with KO and NMSC clamps, 1/2 in back knockout, 2 1/2 in depth and UL listing

  • TypeElectrical Boxes & Covers
  • 5 cu in capacity fits more wiring
  • UL Listed for code-compliant installations
  • Galvanized steel resists corrosion in damp locations
  • TS bracket speeds mounting on wood or metal studs
  • KO clamps secure NM cable without extra hardware

RACO 531 Switch Box for Single Gang

The RACO 531 is a one gang switch box with a 12.5 cu in capacity designed for residential or light commercial wiring. Its galvanized steel construction resists corrosion in typical indoor environments. The unit is UL Listed and ships new for immediate installation.

Galvanized Steel Build with KO Clamps

The box features steel walls finished in gray galvanized zinc for durability. Mounting uses a TS bracket while KO clamps and NMSC clamps secure cables without extra hardware. A single 1/2 inch back knockout provides a clean entry point; no side knockouts are present.

Replaces Smaller or Non Listed Boxes

This box upgrades installations that need more cubic inches for conductor fill or a UL Listed enclosure. The jump is worthwhile when local code requires the listed capacity or when the TS bracket matches existing stud spacing. It does not suit multi gang layouts or applications needing side cable entry.

Highlights

  • 5 cu in capacity fits more wiring
  • UL Listed for code-compliant installations
  • Galvanized steel resists corrosion in damp locations
  • TS bracket speeds mounting on wood or metal studs
  • KO clamps secure NM cable without extra hardware

Specifications

BrandRACO
TypeElectrical Boxes & Covers

Questions about this item

What does the 12.5 cu in capacity limit in a 1-gang switch box?

The 12.5 cu in volume caps the number and size of conductors, clamps and devices allowed by code in this single-gang box.

What bracket and knockout pattern does the TS bracket with KO clamps require for mounting?

The TS bracket mounts to studs; one 1/2 in. back knockout and KO clamps accept NM cable without extra connectors.

How is the galvanized steel box installed, and what step is often missed with KO clamps?

Secure the TS bracket to framing, pull cables through knockouts, then fully seat each cable in the KO clamps so the internal tabs lock.

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