FIELD GUIDESource-led reference

Side by side

NEMA L14-20P versus L14-30P locking plugs

Does the exact equipment require the L14-20P or L14-30P locking configuration?

Computer-generated illustration, not a photograph.
P283 · ConnectorNEMA L14-20P locking plug
Computer-generated illustration, not a photograph.
P285 · ConnectorNEMA L14-30P locking plug

How they differ

  • NEMA L14-20P locking plug Verify L14-20P from its permanent NEMA identifier and exact equipment documentation rather than shell appearance.
  • NEMA L14-30P locking plug Read the L14-30P marking and exact equipment documentation before reasoning about a generator, transfer switch or other application.

Then askDoes the exact equipment require the L14-20P or L14-30P locking configuration?

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
FieldNEMA L14-20P locking plugNEMA L14-30P locking plug
TypeConnectorConnector
FamilyPowerPower
Shaperoundround
Nominal contacts4S312Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.4S314Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
Positions / cavity spanNot 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 rowsNot 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 roleplug (2411)S312Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2411. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.plug (2711)S314Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2711. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
Key distinctionA 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
NEMA L14-20P locking plug — original, not-to-scale identification schematic; drawing review pending
P283 / ConnectorNEMA L14-20P locking plug

Identification schematic · not to scale · drawing review pending

NEMA L14-30P locking plug — original, not-to-scale identification schematic; drawing review pending
P285 / ConnectorNEMA L14-30P locking plug

Identification schematic · not to scale · drawing review pending

LayerConnectorConnector
Key distinctionA 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 contacts4S312Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.4S314Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
Positions / cavity spanNot 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 contactsNot 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 rowsNot 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 pitchNot 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 / axisNot 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 roleplug (2411)S312Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2411. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.plug (2711)S314Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2711. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
Coupling / latchNot 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 / polarizationNot 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 identification4-position/contact/conductor recognition fact in the cited implementation.C283A4-position/contact/conductor recognition fact in the cited implementation.C285A
EvidenceC283A,C283B →
Independent review pending
C285A,C285B →
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 L14-20P locking plugP283 / Connector
Connector
NEMA L14-30P locking plugP285 / Connector
Connector

Key distinction

NEMA L14-20P locking plugP283 / Connector
A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.
NEMA L14-30P locking plugP285 / Connector
A familiar shell, blade or coding family does not establish voltage, current, wiring, grounding, mating or safe operation.

Nominal contacts

NEMA L14-20P locking plugP283 / Connector
4S312Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.
NEMA L14-30P locking plugP285 / Connector
4S314Source-backed nominal position/contact/conductor count for identification: 4. Not a wiring diagram or installation instruction.

Positions / cavity span

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Populated contacts

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact pitch

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Connector role

NEMA L14-20P locking plugP283 / Connector
plug (2411)S312Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2411. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.
NEMA L14-30P locking plugP285 / Connector
plug (2711)S314Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. 2711. Documented role: plug. Manufacturer specification for named part only. No mating-face pin numbering, connector dimension or contact pitch inferred from wire acceptance ranges.

Coupling / latch

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

NEMA L14-20P locking plugP283 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L14-30P locking plugP285 / Connector
Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Documented identification

NEMA L14-20P locking plugP283 / Connector
4-position/contact/conductor recognition fact in the cited implementation.C283A
NEMA L14-30P locking plugP285 / Connector
4-position/contact/conductor recognition fact in the cited implementation.C285A

Evidence

NEMA L14-20P locking plugP283 / Connector
C283A,C283B →
Independent review pending
NEMA L14-30P locking plugP285 / Connector
C285A,C285B →
Independent review pending

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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

S312 · 2411 NEMA L14-20P locking plug

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

Within inspection window

Scoped support: Primary manufacturer identification reference for NEMA L14-20P locking plug: 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

S314 · 2711 NEMA L14-30P locking plug

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

Within inspection window

Scoped support: Primary manufacturer identification reference for NEMA L14-30P locking plug: 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

Trace 4 claims to their source records

C283A · P283

Leviton identifies 2411 as a NEMA L14-20P, 20 A, 125/250 V, 3-pole 4-wire grounding locking plug.

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: S312 · Evidence trail → (private workspace)

C283B · P283

Exact source example 2411: construction: Locking3pole4wire grounding plug; impact-modified nylon body; solid brass contacts. rating: 20 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: S312 · Evidence trail → (private workspace)

C285A · P285

Leviton identifies 2711 as a NEMA L14-30P, 30 A, 125/250 V, 3-pole 4-wire grounding locking plug.

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: S314 · Evidence trail → (private workspace)

C285B · P285

Exact source example 2711: construction: Locking3pole4wire grounding plug; impact-modified nylon body; solid brass contacts. 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: S314 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)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.