B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,163.10
B-Line Eaton series Type 3/3R junction boxes, 18" height, 8" length, 18" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Medium single door,

B-Line Eaton series Type 3/3R junction boxes, 18" height, 8" length, 18" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Medium single door,

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Model: 18188 RTSC
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,163.10
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Eaton B-Line series Type 3/3R junction boxes, 18" height, 8" length, 18" width, NEMA 3R, Screw cover, RTSC enclosure, Surface mounted, Medium single door, 9, Embossed thru holes, Carbon steel

Manufacturer Resources

Product Specs

Bottom Knockouts:
9
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:
18 in
Product Length Depth:
8 in
Product Weight:
20.5 lb
Product Width:
18 in
Special Features:
Rain hood, plated screws
Wall Thickness:
16 gauge
Department:
Electrical
Product Model:
RTSC enclosure
Product Color:
ANSI 61 Grey
Product Style:
Medium single door
Product Material:
Carbon steel

B-LINE 18188 RTSC – Frequently Asked Questions

1) Can the B-Line 18188 RTSC junction box be mounted outdoors?
Yes. The 18188 RTSC is a NEMA 3R enclosure, which means it is rated for outdoor use against falling rain, sleet and snow. It ships with a rain hood and plated screws, and the carbon steel body carries a painted ANSI 61 grey finish. NEMA 3R is not washdown or hosedown rated, so if the location sees direct spray or pressure washing you want a 4 or 4X box instead.
2) What are the actual box dimensions on the B-Line 18188 RTSC enclosure?
18 inches high, 18 inches wide, and 8 inches deep. That 8 inch depth is what decides most jobs, since it sets how much room you have for gutter space, terminal blocks or a small panel behind the cover.
3) Does the 18188 RTSC come with conduit knockouts already punched?
There are 9 knockouts in the bottom of the box. The other five surfaces come blank, so any side, top or back entries have to be punched in the field. Keep penetrations on the bottom or use rain-tight fittings on the sides to hold the 3R rating.
4) Is this a hinged door enclosure or a screw cover box?
Screw cover. The 18188 RTSC uses a flanged cover fastened with plated screws, not a hinged door, so you need clear space in front to lift the cover off and somewhere to set it. If the box gets opened regularly for service, a hinged-door enclosure is the easier choice; screw covers suit pull boxes and terminations you rarely go back into.
5) How does the B-Line 18188 RTSC box mount to a wall?
It is a surface-mount enclosure with embossed thru holes in the back panel area for fasteners. The box weighs 20.5 lb empty, so anchor into studs or use masonry anchors rated well above that once conduit and conductors are added. Mounting screws and anchors are not part of the box.
6) What gauge steel is the 18188 RTSC junction box made from?
16 gauge carbon steel, painted ANSI 61 grey. That is the usual commercial wall thickness for a box this size, stiff enough to carry mounted devices or a DIN rail inside without the sides flexing when you pull cable.
7) Is the Eaton B-Line 18188 RTSC UL listed for a spec job?
It is built to UL 50, the standard for enclosures for electrical equipment. It is also made in the US, which matters on federal and Buy American funded work. The NEMA type on record is 3R.
8) Does a back panel come with the B-Line 18188 RTSC enclosure?
No. What you get is the 18 x 18 x 8 inch screw cover box itself with the rain hood and plated screws. Any inner panel, DIN rail, terminal blocks, ground kit or conduit hubs are separate items. Order the panel sized to an 18 x 18 box if you plan to mount devices inside.
How fast can I get the B-LINE 18188 RTSC 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 18188 RTSC come with a warranty?
Absolutely. The B-LINE 18188 RTSC 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 18188 RTSC?
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 18188 RTSC 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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