NEMA 1-30 — 125 V, 30 A Plug & Receptacle
NEMA 1-30 is a straight-blade configuration per NEMA WD-6: 125 V, 30 A, 2-pole 2-wire non-grounding. Legacy ungrounded 30 A — made as a plug only. The receptacle is 1-30R, the matching plug 1-30P.
Face diagrams by Comrade Mmirg via Wikimedia Commons, CC BY-SA 4.0 / CC0, unmodified.
Specifications
- Configuration
- 1-30
- Series
- Straight blade
- Voltage rating
- 125 V
- Amp rating
- 30 A
- Poles / wires
- 2P–2W
- Neutral
- Yes
- Equipment ground
- No
- Max load (at rating)
- 125 V × 30 A = 3,750 VA
- Continuous (80%)
- 3,000 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
Legacy ungrounded 30 A — made as a plug only. Family 1 overall: two-prong household (legacy; 1-15 only in practice). As a non-grounding configuration it survives only for replacements on existing circuits — new work uses the grounding successor family.
RELATED CONFIGURATIONS
See every configuration on the full NEMA plug & receptacle chart →
Common questions
What is the difference between 1-30R and 1-30P?
The letter is the device: 1-30R is the receptacle (outlet), 1-30P is the plug on the cord. Both share the same configuration — 125 V, 30 A, 2-pole 2-wire non-grounding.
Does NEMA 1-30 have a neutral and a ground?
Yes on the neutral — the 125 V rating means the circuit includes a grounded (neutral) conductor. It is a non-grounding configuration: no equipment ground, which is why new installations use its grounding successor.
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