Side by side

NEMA 14-30R versus 14-50R receptacles

Is the exact grounding receptacle configuration NEMA 14-30R or 14-50R?

Computer-generated illustration, not a photograph. — P278 · ConnectorNEMA 14-30R receptacle

How they differ

NEMA 14-30R receptacle Use permanent NEMA markings and exact electrical documentation; a physical resemblance is not an installation approval.
NEMA 14-50R receptacle Read the NEMA identifier and exact circuit/device documentation before treating a receptacle as a candidate.

Then askIs the exact grounding receptacle configuration NEMA 14-30R or 14-50R?

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
Field	NEMA 14-30R receptacle	NEMA 14-50R receptacle
Type	Connector	Connector
Family	Power	Power
Shape	slot	slot
Nominal contacts	4S307Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.	4S309Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
Positions / cavity span	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rows	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector role	socket (55054-P00)S307Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55054-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.	socket (55050-P00)S309Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55050-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
Key distinction	A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.	A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.

Full evidence ledger and sources ↓

Illustrations are computer-generated with prior AI visual review; independent technical and rights review pending. A comparison is not a compatibility verdict.

This comparison stays within one evidence layer.

All selected records are Connector records. Similar layer does not mean compatible, interchangeable or safe to mate.

Families represented: Power

The reference ledger

Read the same question across.

2 selected records · 13 fields
No score. No compatibility verdict.

On a narrow screen, scroll the table sideways or open the field-by-field reading view below. Illustrations are not a size comparison.

Comparison of selected field notes; source links accompany each documented specification
What you are comparing	P278 / ConnectorNEMA 14-30R receptacle Identification schematic · not to scale · drawing review pending	P280 / ConnectorNEMA 14-50R receptacle Identification schematic · not to scale · drawing review pending
Layer	Connector	Connector
Key distinction	A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.	A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.
Nominal contacts	4S307Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.	4S309Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
Positions / cavity span	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Populated contacts	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact rows	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Contact pitch	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Dimensions / axis	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Connector role	socket (55054-P00)S307Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55054-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.	socket (55050-P00)S309Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55050-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
Coupling / latch	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Keying / polarization	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.	Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
Documented identification	4-position/contact/conductor recognition fact in the cited implementation.C278A	4-position/contact/conductor recognition fact in the cited implementation.C280A
Evidence	C278A,C278B → Independent review pending	C280A,C280B → Independent review pending

Read field by field — no sideways scrolling

The same selected records, fields, values and source links as the table. Missing fields remain non-equivalent; no values are merged.

Layer

NEMA 14-30R receptacleP278 / Connector: Connector
NEMA 14-50R receptacleP280 / Connector: Connector

Key distinction

NEMA 14-30R receptacleP278 / Connector: A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.
NEMA 14-50R receptacleP280 / Connector: A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.

Nominal contacts

NEMA 14-30R receptacleP278 / Connector: 4S307Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
NEMA 14-50R receptacleP280 / Connector: 4S309Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.

Positions / cavity span

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Populated contacts

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact pitch

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Connector role

NEMA 14-30R receptacleP278 / Connector: socket (55054-P00)S307Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55054-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
NEMA 14-50R receptacleP280 / Connector: socket (55050-P00)S309Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 55050-P00. Documented role: socket. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.

Coupling / latch

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

NEMA 14-30R receptacleP278 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA 14-50R receptacleP280 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Documented identification

NEMA 14-30R receptacleP278 / Connector: 4-position/contact/conductor recognition fact in the cited implementation.C278A
NEMA 14-50R receptacleP280 / Connector: 4-position/contact/conductor recognition fact in the cited implementation.C280A

Evidence

NEMA 14-30R receptacleP278 / Connector: C278A,C278B →
Independent review pending
NEMA 14-50R receptacleP280 / Connector: C280A,C280B →
Independent review pending

Your next step

Use the distinction in context.

Open the field notes Read source-linked facts and limitations.Compare another pair Start from a common confusion.Check a connection A comparison is not a compatibility verdict.

Continue the distinction

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Evidence behind this page

Scope first. Source second. Approval separate.

2 linked sources · 4 scoped claims · 0 sources with inspection/access flags.

Page scope: Evidence behind the compared records; the editorial comparison still needs separate review.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-04. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 2 source scopes, access limits and dates

S307 · 55054-P00 NEMA 14-30R receptacle

Leviton · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Primary manufacturer identification reference for NEMA 14-30R receptacle: V47 normalizes the named connector designation and 4-position/contact/conductor context only.

Not established / limitations: Identification/reference scope only. V47 does not turn this source into a universal wiring map, installation approval, safe-use recommendation, fabrication drawing or end-to-end compatibility verdict.

Locator: Product description and Technical Information

S309 · 55050-P00 NEMA 14-50R receptacle

Leviton · Manufacturer / product-owner domain · inspected 2026-10-06 · due 2027-01-04

Within inspection window

Scoped support: Primary manufacturer identification reference for NEMA 14-50R receptacle: V47 normalizes the named connector designation and 4-position/contact/conductor context only.

Locator: Product description and Technical Information

Trace 4 claims to their source records

C278A · P278

Leviton identifies 55054-P00 as a NEMA 14-30R, 30 A, 125/250 V, 3-pole 4-wire grounding receptacle.

Claim scope: V47 identification fact only; the cited product establishes the named connector/configuration and narrow position/conductor context, not universal wiring, mating, installation safety or interchangeability.

Source links: S307 · Evidence trail → (private workspace)

C278B · P278

Exact source example 55054-P00: construction: Surface-mount3pole4wire grounding receptacle; side-wired; thermoplastic body and galvanized-steel strap. rating: 30 A125/250 V. Exact manufacturer part; construction, role and regional rating remain scoped. No physical compatibility, pin map or hardware validation is established.

Claim scope: Exact named component/family technical construction reference from the full current primary document; geometry, ratings and implementation limits do not transfer to other variants.

Source links: S307 · Evidence trail → (private workspace)

C280A · P280

Leviton identifies 55050-P00 as a NEMA 14-50R, 50 A, 125/250 V, 3-pole 4-wire grounding receptacle.

Source links: S309 · Evidence trail → (private workspace)

C280B · P280

Exact source example 55050-P00: construction: Surface-mount3pole4wire grounding receptacle; side-wired; thermoplastic body and galvanized-steel strap. rating: 50 A125/250 V. Exact manufacturer part; construction, role and regional rating remain scoped. No physical compatibility, pin map or hardware validation is established.

Claim scope: Exact named component/family technical construction reference from the full current primary document; geometry, ratings and implementation limits do not transfer to other variants.

Source links: S309 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.