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Manufacturer Resources
Product Specs
- Country Of Origin:
- Canada (CA)
- Product Type:
- Box/housing for built-in mounting in the wall/ceiling
- Selling Unit Of Measure:
- each
- Standards:
- UL E2969
- Volume:
- 15.5 in³
- Department:
- Electrical
- Product Group:
- Electrical Enclosures
- Product Subgroup:
- Boxes
- Product Type2:
- Octogonal Boxes
- Product Size:
- 4 Inches Diameter x 1/2 Inch depth
- Product Color:
- Silver
- Product Material:
- Steel
Steel City 4-OW-MXN – Frequently Asked Questions
1) How many conductors can I legally put in a 4 inch octagon box like the Steel City 4-OW-MXN?
Go off the cubic capacity: this box is 15.5 cubic inches. Under the NEC box fill rules that works out to roughly seven 14 AWG conductors (2.00 in3 each) or six 12 AWG (2.25 in3 each) before you start deducting for the device yoke, clamps, and grounds. Every internal clamp set counts as one conductor of the largest wire size, and all grounds together count as one.
2) Will a standard round ceiling fixture canopy or round cover plate fit this box?
Yes. It's a 4 inch octagon, and 4 inch octagon is the standard ceiling outlet footprint, so 4 inch round covers, blank plates, fixture straps, and luminaire canopies made for 4 inch octagon or 4 inch round boxes all line up with the two mounting ears. Order the cover, strap, or fixture stud separately, since the box ships as a bare box.
3) Is the Steel City 4-OW-MXN a welded box or a drawn box with seams?
It's a welded-construction 4 inch octagon outlet box. Welded corners are what you want when the box is getting concrete or plaster packed around it, or where the box is carrying a fixture load, since there are no open seams to let mud or moisture through. It's a box built for mounting inside a wall or ceiling, not a surface-mount enclosure.
4) Should I use an octagon box or a 4 inch square box for a ceiling fixture?
Use the octagon, which is what the 4-OW-MXN is, when the outlet is a lighting or fan-rated fixture point in a ceiling: the shape matches round canopies and fixture straps and takes less room between joists. Go to a 4 inch square box when you need more cubic capacity for splices or you're mounting a device with a raised square cover. This box gives you 15.5 cubic inches to work with, so if the ceiling point is also a junction for several circuits, size up.
5) What material and finish is the Steel City 4-OW-MXN, and will it corrode in a damp location?
Steel, in a silver (galvanized-appearance) finish. Plain zinc-coated steel is fine for dry and normally damp interior wall and ceiling work, which is what a built-in outlet box is intended for. For wet locations or direct exterior exposure, move to a cast or nonmetallic weatherproof box instead of a sheet steel octagon.
6) Is the 4-OW-MXN sold individually or only by the case?
It is sold each, so you can buy a single box for a one-off repair rather than committing to a carton. That suits property managers and MRO stockrooms replacing a damaged ceiling box on one unit.
7) Where is the Steel City 4-OW-MXN outlet box manufactured?
Canada. That matters on public and institutional jobs where country of origin has to be documented in the submittal package.
How fast can I get the Steel City 4-OW-MXN 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 4-OW-MXN come with a warranty?
Absolutely. The Steel City 4-OW-MXN 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 4-OW-MXN?
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 4-OW-MXN from ZenSupply?
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