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Manufacturer Resources
Spec Sheet
Product Specs
- Idea Granular Category Code Igcc:
- 4425 >> Electrical box covers
- Number Of Knockouts:
- 0
- Product Group:
- Boxes & Enclosures
- Product Type:
- Round/Octagon Box Cover
- Selling Unit Of Measure:
- each
- Standards:
- UL E28688
- Department:
- Electrical
- Product Subgroup:
- Box Covers
- Product Color:
- Silver
- Product Material:
- Aluminum Die Cast
Thomas & Betts SJ-11 – Frequently Asked Questions
1) What is the Thomas & Betts SJ-11 cover used for?
The SJ-11 is a 4-1/2 inch round blank jumbo cover with one hub, used to close off a round outlet or junction box while giving you a single threaded hub entry for conduit. Blank means there is no device or fixture opening in the face, so the box is sealed apart from that hub.
2) What box does a 4-1/2 inch round jumbo cover fit?
It is sized for 4-1/2 inch round jumbo boxes, which are the oversize round pattern rather than the standard 4 inch round. A standard 4 inch round box will not take it, so confirm the box on the wall is the jumbo size before ordering.
3) Does the SJ-11 cover have any knockouts?
No knockouts. The SJ-11 face is blank, with zero knockouts, so the only opening is the single hub. If you need more than one conduit entry at the cover, this is not the part.
4) Will the SJ-11 hold up outdoors or in a damp location?
The body is die cast aluminum, so it resists corrosion better than a plain steel cover in wet or exposed work. It carries UL file E28688. Weatherproof performance also depends on the box and gasket you pair it with, so match it to a round box of the same 4-1/2 inch jumbo pattern.
5) I need a UL listed cover for an inspected job. Is the SJ-11 listed?
It is covered under UL file E28688. That file number is what an inspector or a spec reviewer will want to see referenced for the cover.
6) Is the SJ-11 sold individually or in a carton?
Sold each, one cover per unit, under manufacturer part number SJ-11. Order the quantity you need opening by opening rather than by carton.
How fast can I get the Thomas & Betts SJ-11 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 Thomas & Betts SJ-11 come with a warranty?
Absolutely. The Thomas & Betts SJ-11 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 Thomas & Betts SJ-11?
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 Thomas & Betts SJ-11 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.