B-Line Eaton series wall mount...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2,732.48
B-Line Eaton series wall mounted panel enclosure,20" height,6" length,16" width, 4,Hinged cover,FM enclosure,Wall mount,Medium single door,Thru holes,

B-Line Eaton series wall mounted panel enclosure,20" height,6" length,16" width, 4,Hinged cover,FM enclosure,Wall mount,Medium single door,Thru holes,

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Model: 20166-FM
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$2,732.48
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Eaton B-Line series wall mounted panel enclosure,20" height,6" length,16" width,NEMA 4,Hinged cover,FM enclosure,Wall mount,Medium single door,Thru holes,optional external mounting feet,Carbon steel,Seamless poured in-place gasket

Manufacturer Resources

Product Specs

Certifications:
UL 50
Closure Type:
Hinged
Country Of Origin:
US
Cover Type:
Hinged
Finish Color:
Painted
Mounting Hole Details:
Thru holes, optional external mounting feet
Mounting Method:
Wall
Nema Rating:
4
Product Height:
20 in
Product Length Depth:
6 in
Product Weight:
30 lb
Product Width:
16 in
Special Features:
1/4 turn latches
Wall Thickness:
16 gauge, 16 gauge
Department:
Electrical
Product Model:
FM enclosure
Product Color:
ANSI 61 gray
Product Style:
Medium single door
Product Material:
Carbon steel

B-LINE 20166-FM – Frequently Asked Questions

1) Is the Eaton B-Line 20166-FM enclosure rated for outdoor or washdown locations?
The 20166-FM carries a NEMA 4 rating, so it is built for hose-directed water, splashing water, and windblown dust, indoors or out. A seamless poured in-place gasket around the hinged cover is what makes that rating work, and the box is UL 50 listed. It is not rated for corrosive chemical environments; the shell is painted carbon steel, not stainless.
2) What are the actual box dimensions on the B-Line 20166-FM wall mount enclosure?
20 inches high, 16 inches wide, and 6 inches deep. That 6 inch depth is the number to check first: with a hinged cover and a 16 gauge back panel area, deep breakers, large contactors, or stacked wireway can crowd a 6 inch box. Measure your deepest component plus wire bend space before committing.
3) How does the 20166-FM enclosure mount to a wall, and do I need extra hardware?
It mounts flat to the wall through thru holes in the back of the box. Optional external mounting feet are available if you need the enclosure held off the wall surface, which is the usual choice on block, masonry, or anywhere you want an air gap behind it. Plan your anchors for a 30 lb empty box plus whatever you install inside it.
4) Does the Eaton B-Line 20166-FM come with knockouts already punched?
No. This is a blank NEMA 4 box, and that is deliberate. Any factory knockout would break the watertight seal the rating depends on, so conduit entries are field drilled and sealed with rated hub fittings or watertight connectors. The only holes in the box as shipped are the mounting thru holes in the back.
5) Does the 20166-FM enclosure door need a key or tools to open?
No tools. The hinged cover secures with 1/4 turn latches, so a tech can open it by hand for routine inspection. If you need a padlocked or keyed opening for a public area or tenant space, this latch style is not that.
6) Is a back panel included with the 20166-FM, or do I order it separately?
The 20166-FM is the enclosure itself: a 16 gauge carbon steel single door box with a hinged, gasketed cover and 1/4 turn latches. Mounting panels for B-Line FM series boxes are ordered as a separate item sized to the box, so specify one if you are landing components rather than using the enclosure as a pull or junction box.
7) Can I use the B-Line 20166-FM outdoors in a coastal or chemical wash area?
For outdoor weather exposure, yes, NEMA 4 covers rain, splashing, and hose-directed water. For salt air or chemical washdown, no. Painted carbon steel will corrode in those conditions and you want a 4X stainless or non-metallic enclosure instead.
8) What exact part number should I order for the 20 x 16 x 6 B-Line hinged NEMA 4 box?
Order Eaton B-Line part number 20166-FM. The number reads straight off the dimensions: 20 inch height, 16 inch width, 6 inch depth, FM series.
9) What color is the B-Line FM enclosure, and will it match the other panels in my plant?
Painted ANSI 61 gray, the standard gray used across most industrial control gear, so it lines up visually with typical switchgear and control panel finishes already on the wall. Made in the US.
How fast can I get the B-LINE 20166-FM 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 20166-FM come with a warranty?
Absolutely. The B-LINE 20166-FM 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 20166-FM?
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 20166-FM 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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