NEMA L21-30P Male Twist Locking Plug American Power Cord, 30A, 3φ Y 120/208V, UL/cULus/ETL Certified
NEMA L21-30P
The NEMA L21-30P is a 30A 3φ Y 120/208V Male Twist Locking Plug with 5 prong 4 poles 5 wires, ideal for data centers, concert stages, and event production requiring grounded three-phase wye 120/208V power. This American Power Cord is UL/cULus/ETL certified and constructed with RoHS, REACH, PAHS, and Prop65 compliant materials. Engineered to NEMA WD-6 standards for professional grounded locking power.
Power Cord & Power Connectors Manufacturer With RoHS, Reach, PAHs Compliant.
Frequently Asked Questions
Common questions about NEMA NEMA L21-30P cords and connectors
The NEMA L21-30P is a NEMA locking connector rated 30 A at 120/208 V three-phase wye, 4-pole, 5-wire (grounded, with neutral), for three-phase wye circuits. The L-prefix indicates a twist-locking connector that must be inserted and rotated to secure it, preventing accidental disconnection under vibration. The trailing P identifies it as a male plug; it pairs only with the matching NEMA L21-30R.
The 30 A 120/208 V three-phase wye NEMA L21-30P is typically used for locking 208 V wye power where both three-phase loads and 120 V line-to-neutral devices share one connector, such as event and portable distribution. Selecting the correct 30 A 120/208 V three-phase wye locking connector ensures the contacts and cable can carry the load without overheating and that the three-phase wye supply is connected with the proper grounding and polarity.
The NEMA L21-30P is the locking male plug, typically fitted on the end of a power cord or equipment inlet lead, and it only mates with a matching NEMA L21-30R female receptacle (socket-outlet or cord connector). It carries 30 A at 120/208 V three-phase wye in a 4-pole, 5-wire (grounded, with neutral) configuration, so the outlet, wiring and overcurrent protection must all be rated for at least 30 A.
No. NEMA connectors are keyed by voltage, current, phase and grounding, so the NEMA L21-30P mates only within its own 30 A 120/208 V three-phase wye family. The 5-wire L21 adds a neutral that the 4-wire L18 lacks, so the two are not interchangeable even at the same 208 V voltage. When two configurations must be joined, use a properly rated, UL-listed adapter or cord set, and never exceed the lowest current rating in the chain.
Yes. We manufacture UL/cUL and ETL listed NEMA L21-30P cord sets, rewireable plugs and receptacles, and molded connectors using RoHS, REACH, PAHS and Proposition 65 compliant cable, with custom lengths, wire gauges, jacket colors, strain relief and labeling. MOQ is typically 200-1000 pieces, samples ship in 7-15 days and bulk production takes 15-20 working days.
