B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$509.21
B-Line Eaton series Type 3/3R junction boxes, 12" height, 6" length, 12" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

B-Line Eaton series Type 3/3R junction boxes, 12" height, 6" length, 12" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

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Model: 12126 RTSC NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$509.21
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Eaton B-Line series Type 3/3R junction boxes, 12" height, 6" length, 12" 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:
6 in
Product Weight:
10.1 lb
Product Width:
12 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 12126 RTSC NK – Frequently Asked Questions

1) Can the B-Line 12126 RTSC NK junction box be mounted outdoors?
Yes, within the limits of a NEMA 3R rating. The 12126 RTSC NK carries a Type 3R rating, which covers outdoor use against falling rain, sleet and external ice formation, and it includes a rain hood over the cover seam. It is not a washdown or hosedown enclosure, so if the location sees direct spray or wind-driven water you want a Type 4 box instead.
2) Is the B-Line 12126 RTSC NK enclosure UL listed for a spec job?
It is built to UL 50, the standard for enclosures for electrical equipment. That plus the Type 3R rating is normally what an inspector or a spec section is looking for on an outdoor junction or pull box. The box is made in the US if your project carries a domestic sourcing requirement.
3) Does this B-Line enclosure come with knockouts for conduit?
No. The NK in 12126 RTSC NK means no knockouts, so every conduit entry has to be field drilled or punched. Plan on a step bit or a knockout punch set on site. If you want factory holes, order a knockout version of the same size instead of drilling this one.
4) How does the B-Line 12126 RTSC NK attach to a wall, and do I drill through the back?
It mounts on the surface using embossed thru holes already formed in the back panel, so you fasten straight to the wall or strut without punching new holes in the enclosure. The embossing keeps the fastener seat raised off the mounting surface. At 10.1 lb empty, standard masonry or unistrut hardware handles it, and none of that mounting hardware is supplied with the box.
5) Is the cover hinged or a screw cover on this 12 x 12 x 6 B-Line box?
It is a screw cover, not hinged. The flanged cover lifts off completely once the plated screws are out, which is fine for a junction or pull point you rarely open, but awkward if you need frequent access at height. For regular access, look at a hinged door enclosure in the same NEMA 3R family.
6) What material and gauge is this B-Line 3R junction box, and will it hold up outdoors?
Carbon steel at 16 gauge, painted in ANSI 61 grey. That is a standard commercial industrial finish and gauge combination, so it matches most panelboards and control enclosures already on a plant wall. Because the shell is painted steel rather than stainless, keep it out of corrosive or coastal salt-spray locations and touch up any field-drilled conduit holes to stop rust starting at the cut edge.
7) What is the exact part number to order this 12 x 12 x 6 Eaton B-Line 3R screw cover box?
Order Eaton B-Line part number 12126 RTSC NK. The number reads as the dimensions, 12 high by 12 wide by 6 deep, then RTSC for the rain tight screw cover style and NK for no knockouts. It ships as a single small single door style enclosure with its cover and screws.
How fast can I get the B-LINE 12126 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 12126 RTSC NK come with a warranty?
Absolutely. The B-LINE 12126 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 12126 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 12126 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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