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Square steel electrical box, gray finish, two-gang, 42 cu in capacity

Hubbell Incorporated

Hubbell Incorporated RACO 257 Electrical Box 42 cu in 2 Gangs Steel

SKU CH-526T-HPZF4

Two-gang steel electrical box with 42 cu in capacity, three 1/2 in. back knockouts, twelve 1/2 in. side knockouts, four 3/4 in. back knockouts and ten 3/4 in. side knockouts, UL listed

  • TypeElectrical Boxes & Covers
  • Spacious 42 cu in capacity simplifies wiring
  • Square steel construction resists damage on site
  • Two-gang layout fits dual switches or outlets
  • Abundant 1/2 in and 3/4 in knockouts ease cable entry
  • UL listed for code-compliant installations

Square steel box with 42 cu in capacity

The RACO 257 is a square steel electrical box rated at 42 cubic inches and configured for two gangs. It is suited for residential or light-commercial wiring where multiple circuits share one enclosure. UL listing confirms compliance with recognised safety standards for this type of installation.

Knockout layout simplifies cable entry

The box provides twelve half-inch and ten three-quarter-inch side knockouts plus three half-inch and four three-quarter-inch back knockouts. No integral clamps are included so installers must supply appropriate connectors for each cable run. Careful planning avoids removing knockouts that later prove unnecessary.

Steel construction handles heat and crowding

The 42 cubic inch volume reduces conductor fill pressure during sustained loads, helping insulation remain within temperature limits. Steel walls dissipate heat better than non-metallic alternatives and maintain rigidity when devices are mounted. The gray finish resists corrosion in damp locations.

Highlights

  • Spacious 42 cu in capacity simplifies wiring
  • Square steel construction resists damage on site
  • Two-gang layout fits dual switches or outlets
  • Abundant 1/2 in and 3/4 in knockouts ease cable entry
  • UL listed for code-compliant installations

Specifications

BrandRACO
TypeElectrical Boxes & Covers

Questions about this item

How can I confirm the 42 cu in capacity is correct after mounting the box?

Measure the internal cavity — it should match the listed 42 cu in volume — and verify the UL Listed marking is visible on the steel body.

What comes with the RACO 257 and what must I supply separately?

The box includes the steel enclosure with 3 half‑inch back knockouts, 12 half‑inch side knockouts, 4 three‑quarter‑inch back knockouts and 10 three‑quarter‑inch side knockouts; you must purchase cover plates, clamps and mounting hardware separately.

Which capacity version should I choose for a two‑gang installation?

This model is the 42 cu in two‑gang square steel box; select it when you need that exact volume and knockout configuration.

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