You may also like
Eaton B-Line series Type 3/3R junction boxes
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
- Nema Rating:
- 3R
- Product Height:
- 18 IN
- Product Length Depth:
- 8 IN
- Product Weight:
- 15.5 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
- Mounting Method:
- Surface
- Product Style:
- Medium single door
- Product Material:
- Carbon steel
B-LINE 18128 RTSC NK – Frequently Asked Questions
1) Can the B-Line 18128 RTSC NK junction box be mounted outdoors?
Yes. The Eaton B-Line 18128 RTSC NK is a NEMA 3R enclosure, so it is built for outdoor use against falling rain, sleet and snow. It also includes a rain hood over the cover and plated screws to resist corrosion at the fasteners. NEMA 3R does not cover hosedown or washdown service, so for direct spray you need a 4 or 4X enclosure instead.
2) Does this Eaton B-Line junction box come with conduit knockouts?
No. The NK in 18128 RTSC NK means no knockouts, so the body ships blank and you punch or drill your own openings where your conduit runs land. If you want factory holes, you need a knockout version rather than the NK.
3) Is the B-Line 18128 RTSC NK UL listed, and will it satisfy an inspector for an outdoor pull box?
It is built to UL 50, the standard for enclosures for electrical equipment, and carries a NEMA 3R rating for outdoor rain, sleet and snow service. Those are the two things an inspector looks for on an exterior junction or pull box. Since it ships without knockouts, your field-made openings have to be sealed to maintain the 3R rating.
4) How does the 18128 RTSC NK enclosure mount to a wall?
It is a surface mount box with embossed thru holes in the back pan, so it bolts flat to a wall, strut or backboard through the enclosure itself. The embossed holes keep the fastener seats raised, which helps preserve the rain-tight integrity of the back. Mounting hardware and anchors are sized to your substrate and are not part of the enclosure.
5) How is the cover attached on the 18128 RTSC NK box, and can I get into it after install?
The cover is a flanged screw cover, held with plated screws. That means you back the screws out to open it rather than swinging a hinged door, so leave working room in front and keep the screws accessible. A screw cover suits boxes you open occasionally for splices or pull points; if you are opening it routinely, a hinged-door enclosure is the easier choice.
6) What is this junction box made of and how heavy is it?
Carbon steel, 16 gauge, painted ANSI 61 grey, and it weighs 15.5 lb empty. At that weight a single wall anchor is not enough once conduit and conductors are landed, so fasten through all the back holes into solid backing.
7) Can I paint or match this grey enclosure to other gear on the site?
It arrives painted in ANSI 61 grey, the standard utility and switchgear grey, so it already matches most panelboards, disconnects and control enclosures on a commercial site. The finish is over carbon steel, so any touch-up or repaint should use a primer suited to painted steel.
8) Is the B-Line 18128 RTSC NK made in the USA?
Yes, country of origin is the United States. That matters on government, institutional and utility work where domestic sourcing is written into the spec.
How fast can I get the B-LINE 18128 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 18128 RTSC NK come with a warranty?
Absolutely. The B-LINE 18128 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 18128 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 18128 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.