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Gray steel single-gang masonry electrical box with multiple knockouts

Hubbell Incorporated

Hubbell Incorporated RACO 688 Electrical Box 15.5 cu in 1 Gang Steel

SKU CH-88JE-ZCPQ7

A 15.5 cu in steel masonry box with eight 1/2 in. and eight 3/4 in. knockouts, UL listed for single-gang installations

  • TypeElectrical Boxes & Covers
  • 5 cu in capacity fits more wiring in masonry walls
  • Single-gang steel construction resists impact on job sites
  • Eight 1/2 in. and 3/4 in. side knockouts simplify cable entry
  • Two back knockouts per size allow flexible rear routing
  • UL listed for code-compliant installations

Masonry box for single-gang wiring

This 15.5 cu in steel electrical box is built for masonry walls and accepts a single gang of devices. Two 1/2 in. and two 3/4 in. back knockouts plus six of each on the sides give multiple conduit entry points. The gray finish and UL listing suit residential and commercial rough-in work.

Installers pulling conduit into block or brick

The masonry design and knockout pattern suit electricians who need a deep, gangable box for surface or flush mounting in block or brick. The 2 1/2 in. nominal depth provides room for device wiring. Builders who need a built-in mounting bracket or a shallow old-work box for finished drywall should look at something else.

15.5 cubic inch capacity

The 15.5 cu in volume determines how many conductors and devices the box can legally hold under fill calculations. Match this capacity to your wire count and device size before purchasing.

Highlights

  • 5 cu in capacity fits more wiring in masonry walls
  • Single-gang steel construction resists impact on job sites
  • Eight 1/2 in. and 3/4 in. side knockouts simplify cable entry
  • Two back knockouts per size allow flexible rear routing
  • UL listed for code-compliant installations

Specifications

BrandRACO
TypeElectrical Boxes & Covers

Questions about this item

Does the RACO 688 box come with mounting brackets or clamps, or must I buy them separately?

The box has no bracket and no clamp type listed, so mounting hardware is not included and must be purchased separately.

Should I choose the 15.5 cu in masonry box or a different capacity for a single-gang steel installation?

The 15.5 cu in capacity suits a single-gang masonry box with 2 1/2 in depth; select a different capacity only if your fill calculation or wall depth requires it.

What does the 15.5 cu in capacity mean when the box is installed in a wall?

It allows up to 15.5 cubic inches of conductor fill, supporting the wires, devices and fittings that fit within the 2 1/2 in deep steel enclosure.

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