B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$3,778.64
B-Line Eaton series Type 3/3R junction boxes, 30" height, 12" length, 30" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Medium single d

B-Line Eaton series Type 3/3R junction boxes, 30" height, 12" length, 30" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Medium single d

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Model: 303012 RTSC NK
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$3,778.64
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Eaton B-Line series Type 3/3R junction boxes, 30" height, 12" length, 30" width, NEMA 3R, Screw cover, RTSC NK enclosure, Surface mounted, Medium single door, No knockout, Embossed thru holes, Carbon steel

Manufacturer Resources

Product Specs

Certifications:
UL 50
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:
30 in
Product Length Depth:
12 in
Product Weight:
98.4 lb
Product Width:
30 in
Special Features:
Rain hood,flanged cover,plated studs and wing nuts
Wall Thickness:
14 gauge
Department:
Electrical
Product Model:
RTSC NK enclosure
Product Color:
ANSI 61 Grey
Product Style:
Medium single door
Product Material:
Carbon steel

B-LINE 303012 RTSC NK – Frequently Asked Questions

1) Can a B-Line 303012 RTSC NK enclosure be mounted outdoors?
Yes, within the limits of a NEMA 3R rating. The 303012 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 to shed water. It is not a washdown or hosedown enclosure, so if the location gets pressure spray or windblown dust you need a Type 4 or 12 box instead.
2) What are the actual box dimensions on the B-Line 303012 junction box?
30 inches high, 30 inches wide, and 12 inches deep. That 12 inch depth is what gives you gutter room for bending large conductors or stacking terminal blocks and small components on a back panel, and the 30 by 30 face is the usable door opening area for laying out devices.
3) Does this B-Line enclosure come with conduit knockouts already punched?
No. The RTSC NK is a no-knockout box, so every face is blank and you drill and punch your own openings where the run comes in. For a 3R install that is usually the best practice anyway, since you want penetrations on the bottom or sides rather than the top. Budget for hole saws or a punch set plus rated hub fittings to keep the 3R rating intact.
4) How does the screw cover work, and do I need tools to get into it?
The cover is a flanged screw cover secured with plated studs and wing nuts, so you can back it off by hand without a screwdriver. It is a medium single door style, meaning the whole cover comes off rather than swinging on a hinge, so plan for somewhere to set a 30 by 30 steel cover while you work inside.
5) What gauge steel is the B-Line 303012 RTSC enclosure, and is it painted?
14 gauge carbon steel, painted in ANSI 61 grey. That is the standard industrial gauge and color for gutters and terminal boxes, so it will match existing B-Line and most other ANSI 61 panels on a plant wall. Since it is painted carbon steel rather than stainless or aluminum, touch up any field-drilled holes and scratches to keep corrosion out in an outdoor location.
6) Is this enclosure UL listed for a spec job?
The 303012 RTSC NK is built to UL 50, the standard for enclosures for electrical equipment. It is also made in the US, which matters if your project carries domestic sourcing language. Pair that with the Type 3R rating when you fill out the submittal.
How fast can I get the B-LINE 303012 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 303012 RTSC NK come with a warranty?
Absolutely. The B-LINE 303012 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 303012 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 303012 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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