B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$349.13
B-Line Eaton series Type 3/3R junction boxes, 12" height, 4" length, 8" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door

B-Line Eaton series Type 3/3R junction boxes, 12" height, 4" length, 8" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door

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Model: 1284 RTSC NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$349.13
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Eaton B-Line series Type 3/3R junction boxes, 12" height, 4" length, 8" width, NEMA 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single door, No knockout, Embossed thru holes, Carbon steel

Manufacturer Resources

Product Specs

Certifications:
UL 50
Closure Type:
Flanged cover
Country Of Origin:
United States
Cover Type:
Screw
Finish Color:
Painted
Mounting Hole Details:
Embossed thru holes
Mounting Method:
Surface
Nema Rating:
3R
Product Height:
12 in
Product Length Depth:
4 in
Product Weight:
6.2 lb
Product Width:
8 in
Special Features:
Rain hood, plated screws
Wall Thickness:
16 gauge
Department:
Electrical
Product Model:
RTSC NK enclosure
Product Color:
ANSI 61 Grey
Product Style:
Small single door
Product Material:
Carbon steel

B-LINE 1284 RTSC NK – Frequently Asked Questions

1) Can the B-Line 1284 RTSC NK junction box be used outdoors?
Yes. The Eaton B-Line 1284 RTSC NK is a NEMA Type 3R enclosure, so it is built for outdoor use against falling rain, sleet and snow. It includes a rain hood over the cover seam and plated screws to handle weather exposure. Type 3R does not mean watertight or dust-tight, so for washdown, hose-directed water or heavy dust, step up to a Type 4 or 4X box instead.
2) Does the B-Line 1284 RTSC NK come with knockouts for conduit?
No. The NK in the model designation means no knockout, so the box ships with blank walls and you drill or punch your own conduit entries where the job needs them. That is the usual choice for a 3R outdoor box, since you control where the penetrations land and can keep them out of the weather path. If you want factory knockouts, order a KO version instead.
3) What are the actual box dimensions on the B-Line 1284 RTSC NK enclosure?
It measures 12 inches high by 8 inches wide with a 4 inch depth, and weighs 6.2 lb. Those are the numbers to check against your conduit runs and wire bending space before you order.
4) How does the cover come off on this B-Line screw cover junction box?
The 1284 RTSC NK uses a flanged screw cover, not a hinged door. The cover lifts off completely once the plated screws are backed out, which gives you full open access to pull and land wire but means you are handling a loose cover on a ladder. For frequent access, a hinged-cover enclosure is easier to live with.
5) How is the B-Line 1284 RTSC NK mounted to a wall?
Surface mount, using embossed thru holes in the back of the box. The embossed holes keep the fastener heads off the mounting surface so water does not track into the enclosure at the bolt points. Mounting fasteners are selected for your substrate, whether that is masonry anchors, strut hardware or wood screws.
6) What gauge steel and finish is the B-Line 1284 junction box?
Carbon steel at 16 gauge, painted ANSI 61 grey. That is the standard grey used across most industrial control and electrical gear, so it matches adjacent panels and gutters on a typical plant or building wall. Being painted carbon steel rather than stainless, it is not the box for coastal or corrosive-chemical exposure.
7) Is this B-Line enclosure UL listed, and where is it made?
The 1284 RTSC NK is built to UL 50, the standard covering enclosures for electrical equipment, and it is made in the US. That combination is what most institutional and government specs are looking for on a submittal.
8) What is the correct part number to order this 12 x 8 x 4 B-Line 3R screw cover box?
Order Eaton B-Line part number 1284 RTSC NK. The number reads as the size: 12 inch height, 8 inch width, 4 inch depth, RTSC for the rain-tight screw cover style, NK for no knockouts.
How fast can I get the B-LINE 1284 RTSC NK 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 B-LINE 1284 RTSC NK come with a warranty?
Absolutely. The B-LINE 1284 RTSC NK 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 B-LINE 1284 RTSC NK?
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 B-LINE 1284 RTSC NK 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.
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