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Square galvanised steel electrical box with multiple knockouts

Hubbell Incorporated

Hubbell RACO 680 Electrical Box 30.3 cu in

SKU CH-461B-S29BF

A 30.3 cu in drawn galvanised steel box with seventeen 1/2 in. knockouts, rated for two-hour fire walls

  • TypeElectrical Boxes & Covers
  • 3 cu. in. capacity fits multiple devices
  • Drawn pre-galvanized steel resists corrosion
  • Seventeen 1/2 in. knockouts simplify wiring entry
  • Two-gang square design supports dual switches
  • Acceptable for 2-hour fire-rated wall assemblies

Electrical Box 30.3 cu in

The Hubbell RACO 680 is a 4-inch square electrical box designed for mounting two devices in residential or commercial wiring projects. It provides 30.3 cubic inches of internal capacity for conductors and splices. The drawn construction uses pre-galvanized steel for corrosion resistance. This box suits electricians installing switches or receptacles in standard wall cavities.

Sustained Load Behaviour

The pre-galvanized steel body maintains structural integrity when multiple conductors are pulled through the seventeen 1/2-inch knockouts during installation. The drawn metal resists deformation while devices are fastened and torqued to specification. Its 2-1/8-inch depth accommodates standard device yokes without crowding wires. The box is acceptable for use in 2-hour fire-rated wall assemblies.

Practical Limits of the Standard

The seventeen 1/2-inch knockouts define the maximum number of conduit or cable entries possible without field drilling. The 30.3 cubic inch capacity limits the total conductor fill according to electrical code tables for the wire sizes used. The two-gang format restricts the box to a maximum of two wiring devices. Galvanized coating protects against moisture in typical indoor environments.

Highlights

  • 3 cu. in. capacity fits multiple devices
  • Drawn pre-galvanized steel resists corrosion
  • Seventeen 1/2 in. knockouts simplify wiring entry
  • Two-gang square design supports dual switches
  • Acceptable for 2-hour fire-rated wall assemblies

Specifications

BrandRACO
TypeElectrical Boxes & Covers

Questions about this item

Does the galvanized steel box dissipate heat differently when circuits run continuously?

The drawn pre-galvanized steel construction provides a grounded metal enclosure that conducts heat away from connections during continuous operation.

What mounting hardware must I already have to install this 4-inch square box?

You will need appropriate screws or bolts for the mounting surface and cable clamps or connectors sized for the seventeen 1/2-inch knockouts.

Will the 30.3 cu in capacity accommodate the same wire count as my older 2-gang boxes?

At 30.3 cubic inches the box meets NEC fill requirements for two devices with multiple conductors, matching or exceeding many older 2-gang boxes.

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