Pass & Seymour PS20AC1L Extra ...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$82.23
$36.46
Pass & Seymour PS20AC1L Extra Heavy-Duty Specification Grade Locking Switch, Gray

Pass & Seymour PS20AC1L Extra Heavy-Duty Specification Grade Locking Switch, Gray

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Model: PS20AC1-L

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

$82.23
$36.46
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Pass & Seymour PS20AC1L Extra Heavy-Duty Specification Grade Locking Switch, Gray

The Pass & Seymour PS20AC1L is an industrial extra heavy-duty, specification grade lock switch finished in gray, built for back and side wire terminations. It features an external screw-pressure-plate design that accepts #14 - #10 AWG copper or copper-clad conductors, a heavy-gauge one-piece copper alloy contact arm, and a nickel-plated steel strap with integral ground. This switch is Federal Spec Listed and cULus Listed for demanding commercial and industrial applications.

Key Features

  • Back and Side Wire Terminals: External screw-pressure-plate design accepts #14 - #10 AWG copper or copper-clad conductors for flexible, secure terminations.
  • Durable Construction: Heavy-gauge one-piece copper alloy contact arm virtually eliminates contact bounce; back body is made of glass-reinforced nylon for added strength.
  • Oversized Silver Alloy Contacts: Provide long contact life and better heat dissipation under repeated switching.
  • High-Strength Toggle: Thermoplastic polycarbonate toggle with locking support resists face and back body separation.
  • Positive Grounding: Auto-ground clip assures positive ground, with a standard grounding terminal and a nickel-plated steel strap with integral ground.
  • Fast Make, Positive Break: Cam controls deliver a fast "make" and positive "break" action to minimize arcing, aided by heavy-duty bumper pads for quiet operation.
  • Shallow Design: Compact profile eases installation in standard wiring boxes.

Certifications & Compliance

  • Federal Spec Listed
  • cULus Listed

Technical Specifications

  • Country Of Origin: Mexico
  • Product Color: Grey
  • Product Finish: Matte
  • Product Height: 2.375 in
  • Product Line: Pass & Seymour
  • Product Width: 1.32 in
  • Product Depth: 1.073 in

Typical Applications

  • Industrial and Commercial Electrical Installations
  • Specification-Grade Wiring Device Upgrades
  • Locking Switch Applications Requiring Positive Ground
  • Heavy-Duty Back and Side Wire Terminations
  • Facilities Requiring Federal Spec or cULus Compliant Devices

Why Pass & Seymour?

Pass & Seymour builds this locking switch with a heavy-gauge copper alloy contact arm, oversized silver alloy contacts, and a nickel-plated steel strap with integral ground for dependable, code-compliant performance. Federal Spec Listed and cULus Listed construction makes it a reliable choice for professional electrical work where consistent switching and positive grounding matter.

Manufacturer Resources

Spec Sheet

Product Specs

Product Type:
Switch
Product Color:
Gray
Product Finish:
Matte
Listing:
cULus
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Switches
Product Depth:
1.073 in
Product Width:
1.32 in
Product Material:
Thermoplastic
Product Height:
2.375 in

Pass & Seymour PS20AC1-L – Frequently Asked Questions

1) What wire sizes will the Pass & Seymour PS20AC1L locking switch accept, and can I back wire it?
The PS20AC1L takes #14 through #10 AWG copper or copper-clad conductors through an external screw-pressure-plate terminal, and it is set up for both back wire and side wire terminations. That means you can land 10 AWG on a 20A branch circuit without pigtailing down to 12, and you can choose back wiring where box fill or wire bending room is tight.
2) Will the PS20AC1L fit in a shallow existing wall box?
It is built on a compact, shallow profile specifically to ease installation in standard wiring boxes, and the device body measures 2.375 in high by 1.32 in wide by 1.073 in deep. The back body is glass-reinforced nylon, so the depth stays short while keeping strength. In a crowded old box with several conductors, that 1.073 in depth is the number to check against your remaining space.
3) Does this switch self-ground in a metal box, or do I still need a ground wire?
Grounding is covered two ways on the PS20AC1L. There is an auto-ground clip that makes a positive ground to a properly grounded metal box through the mounting strap, plus a standard grounding terminal for a bonding conductor. The strap is nickel-plated steel with an integral ground. In a nonmetallic box, use the grounding screw terminal.
4) I need a 20A specification grade toggle switch but not a locking one - what should I use instead of the PS20AC1L?
If the toggle does not need to be key- or lock-restricted, the Leviton 1221-2W is an extra heavy-duty industrial specification grade SPST toggle switch rated 20A 120/277V AC. It covers the same single-pole 20A switching duty as the PS20AC1L in a standard toggle rather than a locking toggle, so the handle can be operated by anyone. Choose the PS20AC1L where the locking toggle support is the point - it is built with a thermoplastic polycarbonate toggle with locking support and an auto-ground clip for positive ground.
5) What is the closest equivalent to the Pass & Seymour PS20AC1L locking switch from another brand?
The Leviton 1221-2IL is the nearest match in function: it is an industrial grade locking toggle switch, SPST single-pole, rated 20A at 120/277V. Like the PS20AC1L, it is a locking-toggle AC switch intended for industrial and commercial switching. The Bryant 4802L is also a single-pole locking AC switch, rated 20A 277V in Bryant's 4 Series. The PS20AC1L is gray with a matte finish and is cULus listed, with back and side wire terminals accepting #14 to #10 AWG copper or copper-clad conductors.
6) What does the locking feature on this Pass & Seymour switch actually do?
The PS20AC1L is a locking switch, meaning the toggle is intended to be secured against casual operation rather than left free for anyone to flip. The toggle itself is thermoplastic polycarbonate with locking support that resists separation of the face from the back body. If you want the same extra heavy-duty device without the locking toggle, that is a different catalog number.
7) Is the PS20AC1L approved for government and federal facility work?
The device is Federal Spec Listed and cULus Listed, which is the pair of approvals institutional and government specs most often call for on wiring devices. Those are the two listings carried on this switch.
8) Why choose a specification grade switch like this over a commercial grade one for a high-cycle area?
The difference is in the contact system. The PS20AC1L uses a heavy-gauge one-piece copper alloy contact arm that virtually eliminates contact bounce, oversized silver alloy contacts for longer contact life and better heat dissipation, and cam action that gives a fast make and positive break to limit arcing. Heavy-duty bumper pads keep it quiet. For a corridor, gym, or shop light switched many times a day, that construction is what you are paying for over a residential or commercial grade toggle.
9) I need a 3-way or a center-off switch, not a single locking switch. What should I look at?
The PS20AC1L is a locking switch and will not give you three-way or center-off control. For three-way switching with an indicator, the Leviton 1223-PLR is an extra heavy-duty industrial grade 3-way toggle with pilot light. For a center-off double-pole double-throw application, look at the Leviton 1286-W, a specification grade DPDT center-off toggle. For a switch plus receptacle in one gang, the Eaton decorator duplex combination switch with auto-ground is the commercial grade option.
10) Is the Bryant 4801GLI a substitute for the Pass & Seymour PS20AC1L?
No - they are different devices. The Bryant 4801GLI is a 4-Series 20A 277V lighted AC switch, so its toggle carries an illuminated handle. The PS20AC1L is a locking switch with a thermoplastic polycarbonate toggle with locking support; it has no indicator light. If the requirement on the drawing is a lighted toggle, the 4801GLI answers it; if the requirement is restricted operation of the handle, the PS20AC1L does.
11) Can I use the Bryant 9801 in place of the PS20AC1L on a 20A circuit?
Watch the amperage. The Bryant 9801 is a BR Series 1-pole AC switch rated 15A at 120/277V, while the PS20AC1L is a 20A extra heavy-duty specification grade device. The 9801 matches on pole count and voltage but is a 15A device, and it is not a locking switch. For a 20A specification grade circuit that also needs the locking toggle, the PS20AC1L is the correct selection.
12) I need a switch and receptacle in one box opening - is there an alternative to the PS20AC1L?
The PS20AC1L is a single switching device with back and side wire terminals. For a combination opening, the Eaton decorator duplex combination switch pairs switching with a second device in one strap, is auto-ground, rated 15A, and in white commercial grade. Note it is a 15A commercial grade device, where the PS20AC1L is an extra heavy-duty specification grade locking switch in gray.
13) Will a gray locking switch match the other devices on my job?
The PS20AC1L is gray with a matte finish. Specification-grade gray is the common choice in mechanical rooms, plants, and back-of-house areas; if your finished spaces are white or ivory, the gray will stand out, so plan it for utility locations or order a matching color device for the public side of the building.
14) What is the exact part number and country of origin for this Pass & Seymour locking switch?
Order it as Pass & Seymour PS20AC1-L (catalogued as PS20AC1L), an extra heavy-duty specification grade locking switch in gray. It is made in Mexico.
How fast can I get the Pass & Seymour PS20AC1-L delivered?
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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 Pass & Seymour PS20AC1-L come with a warranty?
Absolutely. The Pass & Seymour PS20AC1-L 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 Pass & Seymour PS20AC1-L?
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
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