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20A 4-Wire Locking Plug for Small Welder, Compressor, UPS
US$2.29
96-179 Boxes
US$2.245
180-959 Boxes
US$2.20
960-1,919 Boxes
US$2.155
1,920-4,799 Boxes
US$2.10
4,800+ Boxes
Sample price:US$2.29/piece.Request sample
Product profile
Grounding
Standard GroundingType
Twist-Lock Industrial Plug (L14-30P)Rated Current
20AModel NO.
NEMA 14-20PShell Material
Fire-Retardant Thermoplastic, 75°C Copper WiringApplication
Commercial, IndustrialFunction
Generator / Transfer Switch / Locking Industrial PIP Rating
IP44Brand
TBSECertification
ROHS, ULNumber of Holes
4-Pole (4-Prong)Rated Voltage
125V/250VPoles & Wires
3-Pole, 4-Wire (2 Hot + Neutral + Ground)Contact Material
BrassColor
BlackPlug Standard
NEMA L14-30PReceptacle Compatibility
NEMA L14-30RLocking Type
Twist-Lock (Locking)Mounting Type
Field-Wiring (Replaceable Male Plug)Indoor / Outdoor
Indoor / Dry Location (outdoor use requires weatheTransport Package
CartonSpecification
18.4*13.5*9.7cmTrademark
TBSEOrigin
ZhejiangKey features
Twist-Lock Design: Twist-to-lock mechanism prevents accidental disconnection caused by vibration, pulling or movement - critical for generator, construction and industrial use.
Standard NEMA L14-20P Configuration: 3-pole, 4-wire male plug rated 20A 125/250V (2 hots + neutral + ground), fully compatible with NEMA L14-20R receptacles.
Generator & Industrial Equipment Ready: Common choice for portable generators up to ~5kW, manual transfer switches, RV power inlets, small welders, compressors and UPS systems.
High-Conductivity Brass Blades: Solid brass locking blades resist deformation and overheating, ensuring stable 30A power transmission under continuous load.
Fire-Retardant Housing: High-grade flame-retardant thermoplastic offers excellent insulation, impact resistance and long service life in demanding environments.
Easy Field Wiring & Installation: Clear X/Y/W/G terminal labels (Hot X, Hot Y, Neutral W, Ground G) allow quick and correct wiring by electricians.
UL / RoHS Compliance: Meets UL 498 safety standards and RoHS environmental requirements, supporting North American and global market access.
Strain-Relief Cord Grip: Ribbed rear housing securely clamps the cable, prevents wire pull-out and withstands frequent twist-lock cycles.
Wide Industrial Applications: Ideal for portable generators, transfer switches, welders, compressors, construction tools, RV power, industrial machinery and UPS systems.
Company profile
WENZHOU GIU ELECTRONIC TECH CO.,LTD.Zhejiang, China
Business Type: Trading CompanyAverage Response Time: ≤0.17h
About Our Factory & Business Background
AddressYueqing, Wenzhou, Zhejiang, China
Our Production Capability & Technical Expertise
Main ProductsFrequency Inverter, Industrial Plug and Socket, NEMA Receptacle
Product Q&A
Q:What is NEMA L14-20P used for?
A:
It is a 20A 125/250V twist-lock male plug, commonly used for portable generators up to ~5kW, manual transfer switches, RV power inlets, small welders, compressors and industrial equipment that requires a locking power connection.
Q:What does X, Y, W, G mean on the terminals?
A:
X and Y are the two hot legs (120V each, 240V between them), W is the neutral (white wire), and G is the ground (green wire). Follow the labels when wiring to avoid misconnection.
Q:What wire and circuit breaker should I use?
A:
Use 12 AWG 4-conductor copper wire (12/4) rated for 20A, connected to a dedicated 20A double-pole breaker with neutral. Installation must follow NEC Article 400 and be done by a licensed electrician.
Q:Why choose a twist-lock plug instead of a straight blade plug?
A:
The twist-lock mechanism locks the plug into the receptacle, preventing accidental disconnection from vibration, pulling, or movement - essential for generators, construction sites and equipment that may be bumped or dragged.
Q:Can I use this plug outdoors?
A:
This plug is rated IP20 for dry locations. If used outdoors (e.g., on a generator), it must be installed with a weatherproof cover or enclosure; otherwise water ingress may cause electric shock or fire.
Send Inquiry
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