NEMA L13-30 — 3Ø 600 V, 30 A Twist-Lock Plug & Receptacle
NEMA L13-30 is a twist-locking configuration per NEMA WD-6: 3Ø 600 V, 30 A, 3-pole 3-wire non-grounding. Three-phase 600 V, no ground. The receptacle is L13-30R, the matching plug L13-30P.
No free-licensed face diagram exists for this configuration yet — locking faces are not on Wikimedia Commons. The specs below still identify it unambiguously.
Specifications
- Configuration
- L13-30
- Series
- Locking (L / twist-lock)
- Voltage rating
- 3Ø 600 V
- Amp rating
- 30 A
- Poles / wires
- 3P–3W
- Neutral
- No
- Equipment ground
- No
- Max load (at rating)
- √3 × 600 V × 30 A = 31,177 VA
- Continuous (80%)
- 24,942 VA
Load figures are the arithmetic of the device rating at unity power factor. Continuous loads (3 hours or more) are limited to 80% of the circuit rating per NEC 210.19/210.20 — and the branch circuit behind the receptacle comes from the load calculation and conductor sizing, not from the plug face.
Where you meet it
Three-phase 600 V, no ground. The locking blades twist in and cannot vibrate or pull loose — the reason generators, stage rigs, and equipment connections spec the L series over its straight-blade cousins.
Common questions
What is the difference between L13-30R and L13-30P?
The letter is the device: L13-30R is the receptacle (outlet), L13-30P is the plug on the cord. Both share the same configuration — 3Ø 600 V, 30 A, 3-pole 3-wire non-grounding, twist-locking blades.
Does NEMA L13-30 have a neutral and a ground?
No neutral — the 3Ø 600 V rating means the circuit runs line-to-line with no neutral. It is a non-grounding configuration: no equipment ground, which is why new installations use its grounding successor.
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