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Manufacturer Resources
Spec Sheet
Product Specs
- Construction:
- Drawn
- Cubic Capacity:
- 35 Cubic Inches
- Knockouts:
- Yes
- Mounting Method:
- Wall-/ceiling mounting
- Number Of Outlet:
- 1
- Outer Dimensions Inches:
- 16.5x13.5x7
- Outer Quantity:
- 20
- Standards:
- UL E2969
- Unspsc:
- 39121316 Ceiling box
- Weatherproof:
- N
- Weight Uom:
- 78.5 lbs. per 100
- Department:
- Electrical
- Product Group:
- Boxes & Enclosures
- Product Subgroup:
- Electrical Boxes
- Product Type:
- Box/housing for built-in mounting in the wall/ceiling
- Product Size:
- 4 Inches Diameter x 3 Inches Depth
- Product Details:
- Octogonal Boxes
- Product Color:
- Silver
- Product Diameter:
- 101.6mm
- Product Shape:
- Octagonal
- Product Material:
- Steel
Steel City 54551 1/2 & 3/4 – Frequently Asked Questions
1) What size is the Steel City 54551 octagon box and how much wire fill does it allow?
The Steel City 54551 is a 4 inch diameter octagon box, 3 inches deep, with 35 cubic inches of volume. That capacity is what decides how many conductors, clamps, devices and fixture studs you can legally count into the box, so it is the number to check against your fill calculation before you rough in. The 4 inch diameter (101.6 mm) matches standard 4 inch octagon covers and fixture canopies.
2) Can I use a Steel City 54551 octagon box outdoors or in a wet location?
No. The 54551 is not weatherproof, so keep it to dry indoor wall and ceiling locations. For an exterior fixture, a porch soffit exposed to driven rain, or any damp or wet location, you need a listed weatherproof box with gasketed cover rather than this drawn steel box.
3) Is a 4 inch octagon box the right choice for hanging a ceiling light fixture?
An octagon box like the 54551 is the usual choice for a ceiling lighting outlet: the 4 inch round footprint lines up with fixture canopies and 4 inch octagon covers, and the 3 inch depth with 35 cubic inches gives room for the fixture leads plus the branch circuit splices. It is a standard outlet box, not a fan-rated box, so a paddle fan or any heavy pendant needs a box and bracket specifically listed for that load. For a switch or receptacle in a wall, use a single or two gang device box instead, since octagon boxes are not drilled for device mounting.
4) What is the Steel City 54551 box made of, and will it take a grounding screw and ground the raceway?
It is drawn steel with a silver zinc-type finish, so it is a conductive metal box. With steel conduit or EMT and listed fittings the box bonds through the raceway, and the tapped hole in the back takes a 10-32 green grounding screw for an equipment grounding conductor pigtail. Drawn construction means a seamless one-piece body rather than a welded seam.
How fast can I get the Steel City 54551 1/2 & 3/4 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Steel City 54551 1/2 & 3/4 come with a warranty?
Absolutely. The Steel City 54551 1/2 & 3/4 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Steel City 54551 1/2 & 3/4?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Steel City 54551 1/2 & 3/4 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.