How it connects
Plug blades push straight into the slots and are held by spring contact friction; non-locking, no seal.
Male and female halves
Female (receptacle, R). Mates with the male NEMA 14-20P plug.
Usually connects to
- NEMA 14-20P plug
Common sizes
- Single size: 20 A, 125/250 V. Same 14-series family has 14-15, 14-30, 14-50, 14-60.
Where it is used
commercial and industrial wiringappliancesgenerators and equipment needing 120/240 V
Variations
- single flush receptacle
- duplex
- connector body (cord-end)
- locking counterpart is a different type: NEMA L14-20R
How to recognise it
Round face with four openings: two parallel vertical slots (hots, X and Y), a U-shaped/round ground hole at top, and a horizontal (neutral) slot opposite the ground; typically marked '20A 125/250V NEMA 14-20R'.
Often confused with
| Confused with | How to tell them apart |
|---|---|
| NEMA L14-20R | L14-20R has curved twist-lock slots in a circle; 14-20R has straight slots. |
| NEMA 14-30R / 14-50R | Higher-amp 14-series have different, larger slot shapes/sizes; check the marking (20A vs 30A/50A). |
| NEMA 10-30R / 6-20R | Those have 3 slots; 14-20R has 4 (two vertical hot slots, an L/shaped or horizontal neutral, and a U-shaped ground). |
Also called
14-20R receptacleNEMA 14-20 outlet20A 125/250V 4-wire straight blade receptacle
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