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Eaton B-Line series Type 3/3R junction boxes
Manufacturer Resources
Product Specs
- Certifications:
- UL 50
- Closure Type:
- Formed top hinge
- Country Of Origin:
- United States
- Cover Type:
- Hinged
- Finish Color:
- Painted
- Locking Provisions:
- Padlock provision
- Mounting Hole Details:
- Embossed thru holes
- Nema Rating:
- 3R
- Product Height:
- 24 IN
- Product Length Depth:
- 8 IN
- Product Weight:
- 25.8 LB
- Product Width:
- 18 IN
- Special Features:
- Rain hood, removable cover
- Wall Thickness:
- 16 gauge
- Department:
- Electrical
- Product Model:
- RTHC NK enclosure
- Product Color:
- ANSI 61 Grey
- Mounting Method:
- Surface
- Product Style:
- Medium single door
- Product Material:
- Carbon steel
B-LINE 24188 RTHC NK – Frequently Asked Questions
1) Can the B-Line 24188 RTHC NK junction box be mounted outdoors?
Yes. The 24188 RTHC NK is a NEMA 3R enclosure, so it handles rain, sleet and snow in outdoor surface-mounted locations, and it includes a rain hood over the door opening. Type 3R does not mean hosedown or dust-tight, so if the location gets washed down or sees heavy airborne dust you want a Type 4 or 12 box instead. Mounting is surface, using the embossed thru holes in the back.
2) What are the actual box dimensions on the 24188 RTHC NK enclosure?
24 inches high, 18 inches wide, 8 inches deep, which is where the 24188 designation comes from. It weighs 25.8 lb empty, so a two-man lift or a second set of hands on the anchors is realistic when hanging it on a wall or strut.
3) Does this B-Line enclosure come with knockouts or a blank back and sides?
It comes with no knockouts. The NK in 24188 RTHC NK means no knockouts, so every conduit entry is drilled or punched in the field. That is what you want on a 3R box, because you control where the penetrations land and you keep them out of the top surface where water collects.
4) Is this B-Line enclosure UL listed for an inspected commercial job?
The 24188 RTHC NK is built to UL 50, the standard covering enclosures for electrical equipment, and it is a US-made Eaton B-Line product. That plus the Type 3R rating is normally what an inspector looks for on an outdoor surface-mounted junction box.
5) Is the cover hinged, and can it be taken off completely during rough-in?
Both. The door is hinged with a formed top hinge and it is also a removable cover, so you can pull it off while you are pulling wire or landing a terminal strip, then hang it back on. The hinge at the top means the open door shields the interior from rain while you are working in it.
6) Can this junction box be locked out for a facility that requires secured electrical enclosures?
There is a padlock provision on the door, so you can hasp it with a standard padlock. That covers most facility and utility requirements for keeping an outdoor junction box out of public hands. The padlock itself is not part of the enclosure.
7) What gauge steel and finish is the 24188 RTHC NK, and will it hold up outside?
16 gauge carbon steel, painted in ANSI 61 grey. That is the standard grey used across industrial switchgear and control enclosures, so it matches existing gear on most plant and utility sites. Being painted steel rather than stainless, it is meant for normal outdoor weather exposure, not coastal salt spray or chemical wash areas, where a stainless or non-metallic 4X enclosure is the right call.
How fast can I get the B-LINE 24188 RTHC 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 24188 RTHC NK come with a warranty?
Absolutely. The B-LINE 24188 RTHC 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 24188 RTHC NK?
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