Cooper Wiring Devices L1430C N...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$48.06
Cooper Wiring Devices L1430C Nylon Locking Connector, Industrial-Grade

Cooper Wiring Devices L1430C Nylon Locking Connector, Industrial-Grade

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Model: L520-C

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

$48.06
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Cooper Wiring Devices L1430C Nylon Locking Connector, Industrial-Grade

The Cooper Wiring Devices L1430C Nylon Locking Connector is engineered for demanding industrial applications where a secure, vibration-resistant connection is essential. Molded from durable nylon and featuring a back-wiring method, this locking connector accepts #18-10 AWG wire and includes an ultra-grip design for confident handling and a positive locking engagement. This connector platform is available in 2-pole and 3-pole configurations rated at 125 volts and 125/250 volts, giving electrical professionals the flexibility to match the connector to the specific industrial power or control circuit at hand. Offered in black and white for easy circuit identification, it is a dependable, code-compliant choice for industrial power and control wiring where a rugged connection matters.

Key Features

  • Durable Construction: Molded nylon body resists impact, chemicals, and wear in industrial environments.
  • Back Wiring Method: Simplifies termination and speeds up installation on the job site.
  • Wire Range: Accepts #18-10 AWG conductors for flexibility across a range of industrial circuits.
  • Configuration Options: Available in 2-pole and 3-pole versions to match circuit requirements.
  • Voltage Range: Offered at 125 volts and 125/250 volts to cover common industrial power configurations.
  • Industrial Application: Engineered specifically for the demands of industrial power and control wiring.
  • Ultra Grip Design: Textured, ergonomic profile provides a secure hold during connection and disconnection.
  • Color Options: Offered in black and white to suit installation and identification needs.

Technical Specifications

  • Material: Nylon
  • Wiring Method: Back
  • Allowable Wire Size: #18-10 AWG
  • Application: Industrial
  • Color: Black, white
  • Design Type: Ultra grip
  • Connection Type: Back Wired
  • Number of Poles Available: 2, 3
  • Voltage: 125 volts, 125/250 volts

Typical Applications

  • Industrial Power and Control Wiring
  • Heavy-Duty Equipment Connections
  • Portable Power and Cord Sets
  • Manufacturing and Plant Floor Installations
  • Commercial and Industrial Renovation Projects

Why Cooper Wiring Devices?

Cooper Wiring Devices builds this locking connector from durable nylon with an ultra-grip design specifically for industrial-duty use, giving electrical professionals a rugged, reliable connection point for demanding circuits across multiple pole and voltage configurations. With a straightforward back-wiring method and a broad #18-10 AWG wire range, it is engineered to deliver consistent, secure performance across industrial installations, whether the application calls for a 2-pole 125 volt setup or a 3-pole 125/250 volt configuration.

Manufacturer Resources

Product Specs

Wiring Method:
Back
Allowable Wire Size:
#18-10 AWG
Application:
Industrial
Design Type:
Ultra grip
Product Type:
Locking Connector
Connection Type:
Back Wired
Product Material:
Nylon
Product Color:
Black, white
Department:
Electrical
Product Group:
Wiring Devices
Product Subgroup:
Plugs & Connectors

Cooper Wiring Devices L520-C – Frequently Asked Questions

1) What's the difference between the Cooper L1430C and L520-C locking connectors?
Two different circuit configurations on the same Cooper nylon ultra-grip connector platform. The L1430C is the 3-pole version rated 125/250 volts, for the two-hot-plus-neutral circuits you see feeding heavy equipment and portable power. The L520-C is the 2-pole, 125 volt version for straight single-phase loads. Both terminate the same way and take the same wire range, so pick by the circuit, not by the body.
2) What wire size can I land in a Cooper ultra-grip locking connector?
#18-10 AWG. That covers most portable cord sets and plant-floor drops, and it means a 10 AWG conductor is the largest thing you can terminate, so a feeder heavier than that needs a different device.
3) What is a direct cross for a Cooper L1430C locking connector in a NEMA L14-20 opening instead of L14-30?
The Cooper L1430C is the 3-pole 125/250 volt nylon ultra-grip connector. If the cord cap and receptacle on the equipment are NEMA L14-20 rather than L14-30, use the Eaton Arrow Hart Ultra-Grip Locking Connector EAT-L1420-C, a 20A 125/250V NEMA L14-20 connector listed as commercial grade. Twist-lock configurations are not interchangeable, so match the blade pattern on the mating device before ordering either one.
4) Which locking connector should I use for a 125/250V circuit if I need a 4-wire 3-pole device rather than the Cooper L1430C?
The Leviton LEV-2413 is an industrial grade locking connector built as a 4-wire 3-pole device rated 125/250V. The Cooper L1430C covers 3-pole 125/250 volt service in a nylon body with an ultra-grip profile and back wiring. Confirm the wire count your cord carries, since a 4-wire device requires a separate equipment ground conductor in addition to the three current-carrying poles.
5) Is there a 2-pole 250V alternative to the Cooper L1430C for single-phase heavy equipment?
Yes. The Eaton EAT-L530C is an Arrow Hart Ultra Grip locking connector, 30A two-pole three-wire in a nylon body, built on the L6-30 series. The Cooper L1430C is the 3-pole 125/250 volt configuration, which carries two hots plus a neutral; the L6-30 pattern carries two hots with no neutral, so it suits 250V-only loads.
6) What locking connector do I use if the equipment needs a 4-pole 5-wire device?
The Leviton LEV-2323 is a 5-wire 4-pole industrial grade locking connector rated 20A. The Cooper connector platform is built in 2-pole and 3-pole configurations at 125 volts and 125/250 volts, so a three-phase 4-pole load calls for the Leviton device instead.
7) Is the Cooper L1430C connector back wired or screw terminal?
Back wired. Conductors land from the back of the device, which keeps the termination tidy inside a cord cap and speeds up field assembly when you're building up cord sets.
8) Will a nylon connector body hold up on a plant floor?
That's what it's built for. The Cooper ultra-grip locking connector uses a molded nylon body rated for industrial service, so it takes impact, chemical exposure and the vibration that loosens lesser connections. The textured ultra-grip profile also matters more than it sounds: it's what lets a gloved hand twist the device home and back off without slipping.
9) I need a 2-pole 125V locking connector for a 30 amp circuit, is the Cooper L520-C right?
The L520-C is the 2-pole 125 volt member of the Cooper ultra-grip family, which is the right voltage and pole count for a 125V single-phase drop. If your receptacle is specifically a NEMA L5-30R pattern, the Leviton 2313 is an industrial grade 3-wire 2-pole connector listed at 125V 30A. Either way the NEMA configuration has to match the mating device exactly, since the blade pattern is what makes the twist-lock engage.
10) Is this Cooper connector a plug or a receptacle end?
It is the connector, the female end that goes on the load end of a cord. It mates with a locking plug, so if you're building a cord set you still need the plug for the supply end. For a 4-pole 5-wire circuit, the Cooper platform doesn't cover it; the Leviton 2323 is a 5-wire 4-pole industrial locking connector at 20A.
11) How does the Cooper L1430C compare with Leviton's industrial locking connectors on grade?
The Cooper L1430C is specified for industrial application in a nylon housing with a back wiring method. The Leviton comparables LEV-2413 and LEV-2423 are both listed at industrial grade, with the LEV-2423 offered in black and white; the Cooper device is likewise offered in black and white for circuit identification. Selection between them usually comes down to the NEMA configuration the mating device requires.
12) Is the Eaton 7506 a substitute for the Cooper L1430C?
No. The Eaton EAT-7506 is an L1-15 locking connector in black, carrying an extra heavy-duty industrial specification grade rating. L1-15 is a 2-pole two-wire pattern and will not mate with the 3-pole 125/250 volt L1430C configuration. Use it only where the existing device on the cord is an L1-15.
13) Can I get these locking connectors in white for circuit identification?
Yes, black and white are both offered on the Cooper ultra-grip line. Facilities crews standardizing a building often colour-code by circuit type, and having both colours on the same device family means the hardware stays identical while the identification changes.
14) Is a twist-lock connector worth it over a straight blade for machinery?
On anything that vibrates or gets dragged, yes. A twist-lock engages positively and won't shake loose the way a straight-blade cord cap does, which is the whole reason the Cooper ultra-grip is specified for industrial power and control wiring and heavy-duty equipment connections. The trade-off is that both ends have to share the same NEMA configuration, so you can't mix patterns across a facility without planning it.
15) Are there non-metallic locking connector alternatives to the Cooper L1430C from Bryant?
Bryant offers the 71020NC, a 7 Series non-metallic NEMA locking connector, and the P468365 in the 705 Series covering NEMA twist-lock configurations. The Cooper L1430C is molded nylon with an ultra-grip design and accepts #18-10 AWG conductors through a back wiring method. Confirm the exact NEMA configuration and wire range of the Bryant device against the cord you are terminating.
How fast can I get the Cooper Wiring Devices L520-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 Cooper Wiring Devices L520-C come with a warranty?
Absolutely. The Cooper Wiring Devices L520-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 Cooper Wiring Devices L520-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
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