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A twist lock plug is an locking plug that must be twisted into the Twist Lock Locking Receptacle to make an electrical connection, locking the plug into the receptacle. Twist lock plugs are used in industry and commercial applications where it is critical that the connection does not become unplugged.
See also our NEMA Configurations Chart for Straight Blade Plugs, Receptacles and Connectors.
Legend
R = Receptacle C = Corded female FO = Flanged outlet P = Plug FI = Flanged inlet
125V
L5
L5-15R L515-R L5-15C L515-FO
L5-15P L515-P L515-FI
L5-20R L520-R L5-20C L520-FO
L5-20P L520-P L520-FI
L5-30R L530-R L5-30C L530-FO
L5-30P L530-P L530-FI
250V
L6
L6-15R L615-R L6-15C L615-FO
L6-15P L615-P L515-FI
L6-20R L620-R L6-20C L620-FO
L6-20P L620-P L620-FI
L6-30R L630-R L6-30C L630-FO
L6-30P L630-P L630-FI
277V AC
L7
L7-15R L715-R L7-15C L715-FO
L7-15P L715-P L715-FI
L7-20R L720-R L7-20C L720-FO
L7-20P L720-PL720-FI
L7-30R L730-R L7-30C L730-FO
L7-30P L730-P L730-FI
480V AC
L8
L8-20R L820-R L8-20C L820-FO
L8-20P L820-P L820-FI
L8-30R L830-R L8-30C L830-FO
L8-30P L830-P L830-FI
600V AC
L9
L9-20R L920-R L9-20C L920-FO
L9-20P L920-P L920-FI
L9-30R L930-R L9-30C L930-FO
L9-30P L930-P L930-FI
125/250V
L10
L10-20R L1020-R L10-20C L1020-FO
L10-20P L1020-P L1020-FI
L10-30R L1030-R L10-30C L1030-FO
L10-30P L1030-P L1030-FI
3 ∅ 250V
L11
L11-20R L1120-R L11-20C L1120-FO
L10-20P L1120-P L1120-FI
L11-30R L1130-R L11-30C L1130-FO
L11-30P L1130-P L1130-FI
3 ∅ 480V
L12
L12-20R L1220-R L12-20C L1220-FO
L12-20P L1220-P L1220-FI
L12-30R L1230-R L12-30C L1230-FO
L12-30P L1230-P L1230-FI
3 ∅ 600V
L13
L13-30R L1330-R L13-30C L1330-FO
L13-30P L1330-P L1330-FI
L14
L14-20R L1420-R L14-20C L1420-FO
L14-20P L1420-P L1420-FI
L14-30R L1430-R L14-30C L1430-FO
L14-30P L1430-P L1430-FI
L15
L15-20R L1520-R L15-20C L1520-FO
L15-20P L1520-P L1520-FI
L15-30R L1530-R L15-30C L1530-FO
L15-30P L1530-P L1530-FI
L16
L16-20R L1620-R L16-20C L1620-FO
L16-20P L1620-P L1620-FI
L16-30R L1630-R L16-30C L1630-FO
L16-30P L1630-P L1630-FI
3 ∅Y120/208V
L18
L18-20R L1820-R L18-20C L1820-FO
L18-20P L1820-P L1820-FI
L18-30R L1830-R L18-30C L1830-FO
L18-30P L1830-P L1830-FI
3 ∅Y277/480V
L19
L19-20R L1920-R L19-20C L1920-FO
L19-20P L1920-P L1920-FI
L19-30R L1930-R L19-30C L1930-FO
L19-30P L1930-P L1930-FI
3 ∅Y347/600V
L20
L20-20R L2020-R L20-20C L2020-FO
L20-20P L2020-P L2020-FI
L20-30R L2030-R L20-30C L2030-FO
L20-30P L2030-P L2030-FI
L21
L21-20R L2120-R L21-20C L1820-FO
L21-20P L2120-P L2120-FI
L21-30R L2130-R L21-30C L2130-FO
L21-30P L2130-P L2130-FI
L22
L22-20R L2220-R L22-20C L2220-FO
L22-20P L2220-P L2220-FI
L22-30R L2230-R L22-30C L2230-FO
L22-30P L2230-P L2230-FI
L23
L23-20R L2320-R L23-20C L2320-FO
L23-20P L2320-P L2320-FI
L23-30R L2330-R L23-30C L2330-FO
L23-30P L2330-P L2330-FI
L6-15P L615-P L615-FI
L6-20P L620-P L520-FI
L8-20P L820-PL820-FI
L6-30P L630-P L530-FI
L11-20P L1120-P L1120-FI
L14-20P L1420-PL1420-FI
L15-20P L1520-PL1520-FI
Shop Locking Plugs
Shop Locking Receptacles
Shop Locking Connectors
Warning: When using this information to perform electrical work, call a licensed electrician or consult the NEC® for safety. All licensed electricians have passed examinations covering the National Electric Code®, know state and local building codes, and may carry insurance to cover damages.