Leviton Industrial Grade Locki...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$24.41
Leviton Industrial Grade Locking Connector, 3-Wire 2-Pole Polarized, 277V

Leviton Industrial Grade Locking Connector, 3-Wire 2-Pole Polarized, 277V

(No reviews yet) Write a Review

Model: 4729-C

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

$24.41
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

Leviton Industrial Grade Locking Connector, 3-Wire 2-Pole Polarized, 277V

The Leviton Industrial Grade Locking Connector is a 3-Wire 2-Pole Polarized device built for demanding power connections that cannot afford accidental disconnects. Rated 277-Volt, 1-Phase, 15-Amp with a NEMA L7-15R locking configuration, this connector is engineered for industrial and commercial environments where secure, polarized mating is essential. Its Black & White housing provides quick visual circuit identification, and its Industrial Grade construction is built to withstand repeated connect/disconnect cycles in demanding facilities.

Key Features

  • Locking Configuration: NEMA L7-15R twist-lock design prevents accidental separation of the connector under vibration or tension.
  • 3-Wire 2-Pole Polarized: Polarized pin arrangement ensures correct orientation and consistent, reliable mating every time.
  • Electrical Rating: Rated 277-Volt, 1-Phase, 15-Amp for use on lighting, control, and equipment circuits within its rating.
  • Industrial Grade Construction: Built to Industrial Grade standards for durability in commercial and industrial power distribution applications.
  • 2-Pole Design: 2-pole configuration simplifies circuit wiring while maintaining a compact connector footprint.
  • Color-Coded Housing: Black & White housing finish aids fast visual identification in multi-circuit installations.

Technical Specifications

  • Grade: Industrial
  • Poles: 2
  • Wiring: 3-Wire
  • Voltage: 277-Volt
  • Phase: 1-Phase
  • Amperage: 15-Amp
  • NEMA Configuration: L7-15R
  • Color: Black & White

Typical Applications

  • Industrial and Commercial Power Distribution
  • Portable Power Equipment and Tool Connections
  • Temporary Power Hookups
  • Equipment and Machinery Wiring
  • Renovation and New Construction Electrical Work

Why Leviton?

Leviton's Industrial Grade Locking Connector combines a secure NEMA L7-15R locking configuration with polarized 3-Wire 2-Pole construction for dependable performance in demanding electrical environments. The Industrial Grade build quality supports the reliability and code-compliant performance professional electricians expect from Leviton power connection products.

Manufacturer Resources

Product Specs

Poles:
2
Grade:
Industrial
Product Type:
Locking Connector
Connection Type:
Locking, Polarized
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Leviton 4729-C – Frequently Asked Questions

1) Will a Leviton L7-15R locking connector work on a 277V lighting circuit?
That's exactly what the L7-15 configuration is for. The Leviton industrial grade locking connector is rated 277 volts, 1-phase, 15 amps, 2-pole 3-wire, so it suits 277V lighting, control, and equipment circuits within that amperage. Do not put it on 120V or 250V circuits expecting a mate; L7-15 devices only accept L7-15 plugs.
2) I need a 250V locking connector, not 277V. What should I use instead?
The Leviton L7-15R will not serve you; L7 is the 277V configuration. For 15A at 250 volts, the Pass & Seymour Turnlok NEMA L6-15 connector is the matching device. If you need 30 amps at 250V, Eaton's Arrow Hart Ultra Grip two-pole three-wire L6-30 connector covers that.
3) What is the difference between a NEMA L7-15R connector and the Pass & Seymour Turnlok L6-15 connector?
Both are 15-amp two-pole three-wire twist-lock connectors, but the blade configuration differs and they will not mate with each other. The Leviton industrial grade locking connector is a NEMA L7-15R rated 277-volt, 1-phase, 15-amp, which is the configuration used on 277V lighting and control circuits. The Pass & Seymour PSL615-C Turnlok is a NEMA L6-15 rated 15A 250V in EHU nylon, which is the 250-volt configuration. Match the connector to the voltage of the circuit and to the plug already on the cord set - an L7-15 body will not accept an L6-15 plug.
4) Is a 2-pole 3-wire connector grounded?
Yes. The 3-wire count on this Leviton locking connector covers two current-carrying poles plus an equipment ground, so you land a hot, a neutral or second hot, and a ground. Two poles, three wires, polarized so it only mates one way.
5) What is the difference between the four Leviton models on this 277V locking connector?
They are four Leviton part numbers covering the same 2-pole 3-wire locking connector family: 27W48, 4579-C, 4729-C, and 4779-C. Order by the exact model number your spec or existing device calls out, since that is what identifies the part at the counter.
6) Will this Leviton connector stay connected on vibrating equipment or a portable cord?
It should. The twist-lock NEMA L7-15R design means the plug rotates into the connector and cannot pull straight out, which is why these get used on portable power equipment, tool drops, and temporary power hookups where a straight-blade device would work loose.
7) Is there a connector with a heavier duty rating than the Leviton industrial grade locking connector?
The Leviton locking connector is built to industrial grade. The Eaton 7506 is catalogued at extra heavy-duty industrial specification grade, a step above standard industrial in construction, but it is a NEMA L1-15 device - a different blade configuration than the L7-15R - so it is a specification upgrade only if your circuit is L1-15. For a 277-volt L7-15 opening the Leviton industrial grade device is the matching configuration.
8) I need more than 15 amps on a two-pole three-wire twist-lock. What should I use instead?
Step up to a 30-amp device. The Leviton locking connector is rated 15-amp, 2-pole, 3-wire, so a load above that rating needs a different configuration. The Eaton Arrow Hart Ultra Grip locking connector is a two-pole three-wire nylon device in the L6-30 series, giving the same two-pole three-wire wiring arrangement at 30 amps. Note the L6-30 blade pattern is a different NEMA configuration, so the mating plug and any cord caps on the equipment have to change with it.
9) Which twist-lock connector should I standardize on for 277V lighting circuits in a facility?
For 277-volt single-phase lighting and control drops, the L7-15R configuration is the one to standardize on, and the Leviton industrial grade locking connector covers it at 15 amps with 3-wire 2-pole polarized construction and a black and white housing for circuit identification. The comparable devices serve other voltages - Pass & Seymour PSL615-C at 250V and Eaton L14-20 at 125/250V - so they are not part of a 277V standard even though they are also twist-lock.
10) Why is the housing black and white, and does the color mean anything electrically?
The black and white housing on the Leviton L7-15R connector is for visual identification only. In a panel room or a multi-circuit run it lets an electrician spot the 277V locking devices at a glance rather than reading each label. It does not change the rating or the wiring.
11) What is a non-metallic alternative to this Leviton locking connector?
Bryant offers non-metallic locking connector bodies: the 71020NC in the 7 Series and the 70520NCC in the 705 Series. Those are the ones to look at if your specification calls out a non-metallic housing. Confirm the NEMA configuration of the Bryant device matches your circuit before substituting, since the Leviton unit is specifically a NEMA L7-15R 277-volt 15-amp device.
How fast can I get the Leviton 4729-C 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 Leviton 4729-C come with a warranty?
Absolutely. The Leviton 4729-C 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 Leviton 4729-C?
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 Leviton 4729-C 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.
!