B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$401.20
B-Line Eaton series Type 3/3R junction boxes, 12" height, 4" length, 10" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

B-Line Eaton series Type 3/3R junction boxes, 12" height, 4" length, 10" width, 3R, Screw cover, RTSC NK enclosure, Surface mounted, Small single doo

(No reviews yet) Write a Review

Model: 12104 RTSC NK
Selected Model is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$401.20
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like
Eaton B-Line series Type 3/3R junction boxes, 12" height, 4" length, 10" 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:
4 in
Product Weight:
7.2 lb
Product Width:
10 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 12104 RTSC NK – Frequently Asked Questions

1) Can the Eaton B-Line 12104 RTSC NK junction box be mounted outdoors?
Yes. The 12104 RTSC NK is a NEMA Type 3R enclosure, which is the rating for outdoor use against rain, sleet and falling dirt. It adds a rain hood over the cover and plated screws to hold up outside, and the carbon steel body is painted ANSI 61 grey. It is not a washdown or submersion enclosure, so if you need hosedown protection you want a Type 4 or 4X box instead.
2) What are the actual box dimensions on the B-Line 12104 RTSC NK enclosure?
It measures 12 inches high, 10 inches wide and 4 inches deep, and weighs 7.2 lb. The 4 inch depth is the number to check first - it sets how much room you have behind the cover for wire bending space, terminal blocks or a small disconnect.
3) Does this B-Line 3R junction box come with knockouts?
No. The NK in 12104 RTSC NK means no knockouts, so the box ships blank and you punch or drill your own conduit entries where the job needs them. On a 3R enclosure, keep entries on the bottom or lower sides and use rated fittings so you don't defeat the rain rating.
4) How does the 12104 RTSC NK mount to a wall or strut?
Surface mount, using embossed thru holes in the back of the box. The holes are formed into the back panel, so fasteners pass through the enclosure wall - use sealing washers outdoors to keep the 3R integrity. Mounting hardware for your wall type is not part of the box.
5) How does the cover come off for pulling wire?
It's a screw cover, flanged, held with plated screws. That means removing every screw to open it, so plan for a full cover-off pull rather than a hinged swing. If crews will be in the box often for service, a hinged or clamped cover enclosure is the easier choice.
6) Is this junction box heavy enough gauge for a commercial exterior wall?
The body is 16 gauge carbon steel with a painted finish in ANSI 61 grey. That is the standard weight for a commercial sheet steel junction enclosure of this size, and at 7.2 lb one person can set it. In corrosive or coastal air, a stainless or non-metallic 4X enclosure holds up better than painted carbon steel.
7) Is the B-Line 12104 RTSC NK UL listed for spec work?
It carries UL 50, the standard for enclosures for electrical equipment, and it is made in the US. That plus the Type 3R rating is normally what an inspector or a spec section is looking for on an outdoor junction box.
8) What is the exact part number to order for this Eaton B-Line box?
Order it as 12104 RTSC NK. The leading digits carry the size: 12 inch height, 10 inch width, 4 inch depth. RTSC is the rain-tight screw cover style and NK means no knockouts.
How fast can I get the B-LINE 12104 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 12104 RTSC NK come with a warranty?
Absolutely. The B-LINE 12104 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 12104 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 12104 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.
!