B-Line Eaton series Type 3/3R ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$188.80
$187.10
B-Line Eaton series Type 3/3R junction boxes, 6" height, 4" length, 4" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Small single door, 2

B-Line Eaton series Type 3/3R junction boxes, 6" height, 4" length, 4" width, 3R, Screw cover, RTSC enclosure, Surface mounted, Small single door, 2

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Model: 644 RTSC
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$188.80
$187.10
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Eaton B-Line series Type 3/3R junction boxes, 6" height, 4" length, 4" width, NEMA 3R, Screw cover, RTSC enclosure, Surface mounted, Small single door, 2 bottom knockouts, Embossed thru holes, Carbon steel

Manufacturer Resources

Product Specs

Bottom Knockouts:
2
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:
6 in
Product Length Depth:
4 in
Product Weight:
2.4 lb
Product Width:
4 in
Special Features:
Rain hood, plated screws
Wall Thickness:
16 gauge
Department:
Electrical
Product Model:
RTSC enclosure
Product Color:
ANSI 61 Grey
Product Style:
Small single door
Product Material:
Carbon steel
Product Length:
4 in

B-LINE 644 RTSC – Frequently Asked Questions

1) Can the B-Line 644 RTSC junction box be mounted outdoors?
Yes. The Eaton B-Line 644 RTSC is a NEMA Type 3R enclosure, so it is built for outdoor use where falling rain, sleet and external ice formation are the concern. It is carbon steel with a painted ANSI 61 grey finish and includes a rain hood over the cover plus plated screws to resist corrosion at the fasteners. Type 3R does not mean washdown or hosedown duty, so keep it off surfaces that get pressure sprayed.
2) What size is the 644 RTSC enclosure and how much room do I have for splices?
The box measures 6 inches high, 4 inches wide and 4 inches deep, and it weighs 2.4 pounds. That is a small single door screw cover box, sized for a handful of splices, a small terminal block or a single device, not for gutter work or large wire bending radius.
3) Does the 644 RTSC junction box come with knockouts, and where are they?
There are 2 knockouts, both in the bottom of the box. That placement suits a 3R install where conduit enters from below and water cannot track in. If your run enters from the top or a side, you will be drilling and using a raintight fitting, and a top penetration on a 3R box needs a hub rated for it.
4) How does this B-Line box mount to a wall?
It is a surface mount enclosure with embossed thru holes in the back panel area, so it fastens directly to a wall, strut or post with your own screws or bolts. The embossed holes stand the box off the mounting surface slightly, which is what keeps water from sitting behind it on an exterior wall. Mounting hardware is not part of the enclosure.
5) Is the cover on the 644 RTSC hinged or does it screw on?
Screw cover, flanged type. The cover lifts off entirely once the plated screws are out, which gives full access to the box interior but means you need a hand free for the cover during service. If you want a door you can swing open and latch one-handed for frequent access, look at a hinged cover 3R enclosure instead.
6) Does this enclosure carry a UL listing for a spec job?
The 644 RTSC is built to UL 50, the standard covering enclosures for electrical equipment, and it is made in the United States. For submittals on federal or Buy American work, the US country of origin on this box is the line the reviewer is looking for.
7) What part number do I order for this B-Line 3R screw cover box?
Order Eaton B-Line 644 RTSC. The RTSC designation is the screw cover raintight enclosure line, and the 644 prefix is the size: 6 high by 4 by 4.
How fast can I get the B-LINE 644 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 644 RTSC come with a warranty?
Absolutely. The B-LINE 644 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 644 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 644 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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