Side by side

NEMA L5-20 versus L6-20 locking plugs

Is the documented locking plug configuration L5-20P or L6-20P?

Computer-generated illustration, not a photograph. — P217 · ConnectorNEMA L5-20P locking plug

How they differ

NEMA L5-20P locking plug Read the molded or documented NEMA code instead of judging only by the curved blade pattern.
NEMA L6-20P locking plug Use the exact NEMA marking and equipment documentation to distinguish L6-20P from other locking plugs.

Then askIs the documented locking plug configuration L5-20P or L6-20P?

At a glance

Source-scoped form facts; counts, variants and unknowns are distinct
Field	NEMA L5-20P locking plug	NEMA L6-20P locking plug
Type	Connector	Connector
Family	Power	Power
Shape	round	round
Nominal contacts	3S222NEMA L5-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L5-20P locking plug	3S224NEMA L6-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L6-20P locking plug
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	plug; plug (L520P)S222 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L5-20P locking plug L520P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.	plug; plug (L620P)S224 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L6-20P locking plug L620P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.
Key distinction	Locking geometry and NEMA code are safety-relevant identifiers; a nearby locking form is not a substitute.	L6-20 and L5-20 are intentionally different configurations; visual similarity is not interchangeability.

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	P217 / ConnectorNEMA L5-20P locking plug Identification schematic · not to scale · drawing review pending	P219 / ConnectorNEMA L6-20P locking plug Identification schematic · not to scale · drawing review pending
Layer	Connector	Connector
Key distinction	Locking geometry and NEMA code are safety-relevant identifiers; a nearby locking form is not a substitute.	L6-20 and L5-20 are intentionally different configurations; visual similarity is not interchangeability.
Nominal contacts	3S222NEMA L5-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L5-20P locking plug	3S224NEMA L6-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L6-20P locking plug
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	54.1 mm rear ribbed body diameter (L520P); 48.5 mm front body diameter (L520P); 64.8–77.5 mm body axial span minimum (adjustable cord clamp) (L520P)S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. L520P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.	54.1 mm rear ribbed body diameter (L620P); 48.5 mm front body diameter (L620P); 64.8–77.5 mm body axial span minimum (adjustable cord clamp) (L620P)S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. L620P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.
Connector role	plug; plug (L520P)S222 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L5-20P locking plug L520P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.	plug; plug (L620P)S224 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L6-20P locking plug L620P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.
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	NEMA L5-20P locking plug; 20 A, 125 V, 2-pole, 3-wire grounding.C217A	NEMA L6-20P locking plug; 20 A, 250 V, 2-pole, 3-wire grounding.C219A
Evidence	C217A,C217C → Independent review pending	C219A,C219C → 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 L5-20P locking plugP217 / Connector: Connector
NEMA L6-20P locking plugP219 / Connector: Connector

Key distinction

NEMA L5-20P locking plugP217 / Connector: Locking geometry and NEMA code are safety-relevant identifiers; a nearby locking form is not a substitute.
NEMA L6-20P locking plugP219 / Connector: L6-20 and L5-20 are intentionally different configurations; visual similarity is not interchangeability.

Nominal contacts

NEMA L5-20P locking plugP217 / Connector: 3S222NEMA L5-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L5-20P locking plug
NEMA L6-20P locking plugP219 / Connector: 3S224NEMA L6-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L6-20P locking plug

Positions / cavity span

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Populated contacts

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact rows

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Contact pitch

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Dimensions / axis

NEMA L5-20P locking plugP217 / Connector: 54.1 mm rear ribbed body diameter (L520P); 48.5 mm front body diameter (L520P); 64.8–77.5 mm body axial span minimum (adjustable cord clamp) (L520P)S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. L520P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.
NEMA L6-20P locking plugP219 / Connector: 54.1 mm rear ribbed body diameter (L620P); 48.5 mm front body diameter (L620P); 64.8–77.5 mm body axial span minimum (adjustable cord clamp) (L620P)S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. L620P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.

Connector role

NEMA L5-20P locking plugP217 / Connector: plug; plug (L520P)S222 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L5-20P locking plug L520P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.
NEMA L6-20P locking plugP219 / Connector: plug; plug (L620P)S224 · S929Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. NEMA L6-20P locking plug L620P. Documented role: plug. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile.

Coupling / latch

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Keying / polarization

NEMA L5-20P locking plugP217 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.
NEMA L6-20P locking plugP219 / Connector: Not recordedNot recorded in a normalized source-scoped field. Consult the exact part/revision; no value inferred from illustrations.

Documented identification

NEMA L5-20P locking plugP217 / Connector: NEMA L5-20P locking plug; 20 A, 125 V, 2-pole, 3-wire grounding.C217A
NEMA L6-20P locking plugP219 / Connector: NEMA L6-20P locking plug; 20 A, 250 V, 2-pole, 3-wire grounding.C219A

Evidence

NEMA L5-20P locking plugP217 / Connector: C217A,C217C →
Independent review pending
NEMA L6-20P locking plugP219 / Connector: C219A,C219C →
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.

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Evidence behind this page

Scope first. Source second. Approval separate.

3 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 2027-01-03. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 3 source scopes, access limits and dates

S222 · HBL2311 Twist-Lock L5-20P plug

Hubbell Wiring Device-Kellems · Manufacturer / product-owner domain · inspected 2026-10-05 · due 2027-01-03

Within inspection window

Scoped support: Identifies the NEMA L5-20P locking plug configuration as a 20 A, 125 V, 2-pole, 3-wire grounding form.

Not established / limitations: Identification/reference scope only. V39 does not convert this source into a universal pinout, fabrication drawing, electrical approval, protocol guarantee or end-to-end compatibility verdict.

Locator: NEMA rating and conductor-related fields

S224 · HBL2321BK Twist-Lock L6-20P plug

Hubbell Wiring Device-Kellems · Manufacturer / product-owner domain · inspected 2026-10-05 · due 2027-01-03

Within inspection window

Scoped support: Identifies the NEMA L6-20P locking plug configuration as a 20 A, 250 V, 2-pole, 3-wire grounding form.

Locator: NEMA rating and conductor-related fields

S929 · Hubbell-PRO locking plug technical submittal WLSPPRO001

Hubbell Wiring Device-Kellems · Unclassified publisher domain · inspected 2026-10-22 · due 2027-01-20

Within inspection window

Scoped support: Current primary-document research for P217 / L520P, P219 / L620P. Each normalized fact retains its exact part/family, role and document scope.

Not established / limitations: No independent technical review, hardware validation, specimen measurement or general interoperability approval. Exact scopes and unresolved fields remain controlling.

Locator: p.1KeyFeatures,Dimensions,part/configurationtable,Performance

Trace 4 claims to their source records

C217A · P217

Hubbell identifies NEMA L5-20P locking plug with the documented NEMA configuration and 2-pole, 3-wire grounding context.

Claim scope: V39 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.

Source links: S222 · Evidence trail → (private workspace)

C217C · P217

Exact source example L520P: construction: 2pole3wiregrounding nylon cord plug with rubber dust shield. rating: 20A125VAC. temperature: 60Cmaximumcontinuous;-40Cminimumwithoutimpact. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile. 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: S929 · Evidence trail → (private workspace)

C219A · P219

Hubbell identifies NEMA L6-20P locking plug with the documented NEMA configuration and 2-pole, 3-wire grounding context.

Claim scope: V39 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction, protocol guarantee or end-to-end compatibility proof.

Source links: S224 · Evidence trail → (private workspace)

C219C · P219

Exact source example L620P: construction: 2pole3wiregrounding nylon cord plug with rubber dust shield. rating: 20A250VAC. temperature: 60Cmaximumcontinuous;-40Cminimumwithoutimpact. New exact Hubbell-PRO L520P/L620P variants, not inherited HBL2311/HBL2321 part dimensions.; Axial dimension excludes exposed blade projection and is an adjustment range.; Drawing pairs2.13in with54.1mm and1.89in with48.5mm as printed; latter conversion differs by0.49mm. Retain mm primary and flag discrepancy rather than silently reconcile. 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: S929 · 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.