Leviton 4-Wire 3-Pole Non-NEMA Industrial Grade Locking Connector, 250-Volt AC/DC
The Leviton 4-Wire 3-Pole Non-NEMA Industrial Grade Locking Connector is engineered for demanding power distribution applications where a secure, twist-lock connection is required. Rated 250-Volt AC/DC, this industrial grade connector is built to Leviton's rigorous durability standards for reliable performance in commercial, industrial, and heavy-duty electrical environments. The 4-wire, 3-pole non-NEMA configuration provides a locking connection designed to resist accidental disconnection in high-vibration or high-traffic settings, making it a dependable choice for professional electricians and facility maintenance teams.
Key Features
- Configuration: 4-wire, 3-pole non-NEMA design for specialized industrial power connections.
- Locking Connection: Twist-lock style engagement helps prevent accidental disconnects in demanding environments.
- Voltage Rating: Rated 250-Volt AC/DC for compatibility with a range of industrial power systems.
- Industrial Grade Build: Constructed to Leviton's industrial grade standards for long-term reliability under repeated use.
- Non-NEMA Design: Purpose-built non-NEMA configuration for applications requiring a dedicated, specialized locking interface.
- Trusted Brand: Backed by Leviton, a recognized name in professional-grade electrical wiring devices.
Technical Specifications
- Poles/Wires: 3-Pole, 4-Wire
- Voltage: 250-Volt AC/DC
- Configuration: Non-NEMA
- Grade: Industrial
- List Batch: LEV-20260730
Typical Applications
- Industrial and Commercial Power Distribution
- Heavy-Duty Equipment and Machinery Connections
- Facility Maintenance and Retrofit Wiring
- Temporary and Portable Power Setups
- Professional Electrical Contractor Installations
Why Leviton?
Leviton is a trusted manufacturer of professional-grade wiring devices, and this industrial grade, non-NEMA locking connector reflects that commitment to dependable performance. With a 250-Volt AC/DC rating and a secure locking connection, this connector is built to withstand the rigors of industrial and commercial electrical work. Choose Leviton for consistent, code-conscious electrical components that professionals rely on.
Manufacturer Resources
Product Specs
- Product Type:
- Locking Connector
- Connection Type:
- Locking
- Amperage Rating:
- 50A
- Voltage Rating:
- 250V
- Poles:
- 3
- Nema Rating:
- Industrial
- Grade:
- Industrial
- Product Color:
- Black
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Subgroup:
- Plugs & Connectors
Leviton 3764-C – Frequently Asked Questions
1) What amp and voltage is the Leviton 3764-C locking connector rated for?
The Leviton 3764-C is rated 50A at 250 volts, AC or DC, in a 3-pole 4-wire locking configuration. That puts it in the range used for heavy equipment feeds and portable power drops rather than general receptacle work.
2) Will a Leviton 3764-C mate with a standard NEMA twist-lock plug like an L14-20 or L6-30?
No. The 3764-C is a non-NEMA configuration, so its blade pattern is not interchangeable with NEMA twist-lock devices. If you need a NEMA-configured connector, Eaton's Arrow Hart Ultra-Grip L14-20 connector (20A, 125/250V) or the Ultra Grip L6-30 two-pole three-wire connector are NEMA-pattern options. For the 3764-C, match it to the same non-NEMA Leviton mating device.
3) Is 3-pole 4-wire the same as three-phase with a ground?
Three poles plus a fourth wire means three current-carrying contacts and an equipment ground, which is how a 250-volt three-phase load is fed without a neutral. If your load needs a neutral in addition to the three phases, a 3-pole 4-wire device is the wrong count and you need a 4-pole 5-wire connector instead.
4) What is the difference between the Leviton 3764-C locking connector and the Eaton Arrow Hart L14-20 Ultra-Grip connector?
The Leviton 3764-C is a 3-pole, 4-wire non-NEMA locking connector rated 50A at 250V AC/DC and built to industrial grade. The Eaton Arrow Hart Ultra-Grip L1420-C is a NEMA L14-20 device rated 20A at 125/250V and built to commercial grade. Because the 3764-C uses a non-NEMA interface, it will not mate with an L14-20 inlet or plug, and the amperage and grade differ as well, so the two are not interchangeable on the same circuit.
5) If I need a standard NEMA twist-lock connector instead of the non-NEMA Leviton 3764-C, what should I look at?
The Leviton 3764-C uses a non-NEMA locking interface, so it only mates with matching non-NEMA devices. For a standard NEMA twist-lock configuration, the Bryant 705 Series locking connector is offered in NEMA twist-lock configurations, and the Bryant 71020NC is a non-metallic NEMA locking connector from the 7 Series. Match the NEMA configuration code on the existing plug or inlet before ordering.
6) Is this connector tough enough for a machine shop or a portable generator cart?
It's built to Leviton's industrial grade, with a twist-lock engagement meant to hold under vibration and foot traffic, which is where a straight-blade connector pulls apart. Typical uses are power distribution, heavy equipment feeds, maintenance and retrofit wiring, and temporary or portable power setups.
7) Is the Leviton 3764 connector the female cord end or the plug?
It's the connector, meaning the female cord-mounted end that accepts a mating plug. It's not a receptacle body and not the plug half, so for a complete cord assembly you also need the matching non-NEMA plug of the same 3-pole 4-wire 50A pattern.
8) What is the Leviton part number I should order to match existing connectors in my facility?
Order Leviton 3764-C. It's a single-model item, so there are no finish or amperage variants to pick between, and matching that number is how you keep an existing fleet of 50A non-NEMA drops standardized.
9) We only need a 30A two-pole three-wire 250V locking connector, not 50A. What is a lighter option than the Leviton 3764-C?
The Leviton 3764-C is a 50A, 3-pole, 4-wire device at 250V AC/DC. For a smaller single-phase load, the Eaton Arrow Hart Ultra Grip L6-30 connector is a 30A two-pole three-wire nylon device. It carries fewer current-carrying conductors, so confirm your cord and equipment do not require the fourth wire before substituting.
10) Which locking connectors besides the Leviton 3764-C are built to an industrial specification grade?
The Leviton 3764-C is rated industrial grade. On the Eaton side, the 7506 L1-15 locking connector is built to an extra heavy-duty industrial specification grade, though it is a much smaller L1-15 configuration in black. For a 50A 250V four-wire run, the 3764-C is the one of the two that carries that rating.
11) Can the Eaton 7506 be used in place of the Leviton 3764-C?
No. The Eaton 7506 is an L1-15 locking connector, a two-wire 15A-class configuration, while the Leviton 3764-C is a 3-pole 4-wire non-NEMA connector rated 50A at 250V. The blade patterns and current ratings do not correspond, so the 7506 is not a substitute on a 250V four-wire feed.
12) Can I use this on a DC circuit, not just AC?
Yes, the 250-volt rating covers both AC and DC, so it can serve DC power carts and battery or drive equipment at or below 250 volts and 50 amps.
13) I need a non-metallic housing on a locking connector. Does the Leviton 3764-C fit, or is there another option?
The Leviton 3764-C is a black industrial grade locking connector rated 50A, 250V AC/DC. If a specifically non-metallic body is called out on the drawing, the Bryant 71020NC is a non-metallic NEMA locking connector in the 7 Series. Note that it uses a NEMA configuration rather than the non-NEMA interface of the 3764-C, so the two will not mate with the same plug.
14) What color is the Leviton 3764-C housing?
Black. Worth noting if you color-code power drops by voltage or circuit on a plant floor, since the whole 3764-C run comes in black only.
How fast can I get the Leviton 3764-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 3764-C come with a warranty?
Absolutely. The Leviton 3764-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 3764-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 3764-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.