NEMA L21-20R Female Twist Locking Receptacle American Power Cord, 20A, 3φ Y 120/208V, UL/cULus/ETL Certified
NEMA L21-20R
The NEMA L21-20R is a 20A 3φ Y 120/208V Female Twist Locking Receptacle 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 L21-20R cords and connectors
The NEMA L21-20R is a NEMA locking connector rated 20 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 R identifies it as a female receptacle; it pairs only with the matching NEMA L21-20P.
The 20 A 120/208 V three-phase wye NEMA L21-20R 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 20 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 L21-20R is the locking female receptacle (socket-outlet or cord connector) and accepts only the matching NEMA L21-20P male plug. It is rated 20 A at 120/208 V three-phase wye in a 4-pole, 5-wire (grounded, with neutral) configuration, and it supplies power to the connected cord or equipment only when the correctly keyed 20 A plug is inserted.
No. NEMA connectors are keyed by voltage, current, phase and grounding, so the NEMA L21-20R mates only within its own 20 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 L21-20R 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.
