E217 · Contact count only

NEMA L5-20P locking plug engineering reference

Manufacturer listing identifies L5-20P as 2-pole, 3-wire grounding; V40 publishes count only, not terminal placement. Current source example: 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.

Open field note Source trail

Source checked · no independent review claimed · Fabrication approved: no

NEMA L5-20P locking plug engineering boundary original orientation schematic — Original V40 engineering boundary schematic; not to scale and not a fabrication, gauging, wiring or mating-face locator drawing.

Contact count

3

NEMA L5-20P locking plug

Mating boundary

Shape is not the verdict.

NEMA L5-20P locking plug ↔ matching NEMA L5-20R receptacle/connector

Orientation

How to read this profile

No V40 face-view or terminal locator; do not infer conductor placement from this profile.

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts	3S222NEMA L5-20P locking plug; nominal engineering count, not automatically positions, population or a device wiring map. NEMA L5-20P locking plug
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.
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.
Manufacturer	Hubbell Wiring Device-Kellems (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.
Series	Hubbell-PRO (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.
Exact part / implementation	L520P (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.
Recorded markings	NEMA configuration and rating marked on device face;terminal identification explicitly documented. (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.
View convention	Published oblique plug mating-face and cable-entry photos;side-view body dimension drawing. (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.

Not recorded: Positions / cavity span, Populated contacts, Contact rows, Contact pitch, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits

Contact/pole count does not establish terminal placement, conductor colors, voltage compatibility or safe substitution.
No fabrication dimensions, live-work procedure or device-level electrical approval is published.

Report a correction to these facts →

Unknowns stay unknown.

Contact/pole count does not establish terminal placement, conductor colors, voltage compatibility or safe substitution.
No fabrication dimensions, live-work procedure or device-level electrical approval is published.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

C217Bsource checked

Hubbell identifies the L5-20P form as a 2-pole, 3-wire grounding locking plug.

Hubbell Wiring Device-Kellems · HBL2311 Twist-Lock L5-20P plug ↗
NEMA rating and conductor-related fields · 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.

C217Csource checked

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.

Hubbell Wiring Device-Kellems · Hubbell-PRO locking plug technical submittal WLSPPRO001 ↗
p.1KeyFeatures,Dimensions,part/configurationtable,Performance · No independent technical review, hardware validation, specimen measurement or general interoperability approval. Exact scopes and unresolved fields remain controlling.

2 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

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

Page scope: Original V40 engineering boundary schematic; not to scale and not a fabrication, gauging, wiring or mating-face locator drawing.

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 2 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

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 2 claims to their source records

C217B · P217

Hubbell identifies the L5-20P form as a 2-pole, 3-wire grounding locking plug.

Claim scope: V40 engineering-reference fact only; independent human review remains pending. This claim does not approve fabrication, rewiring, substitution, electrical safety, protocol support or end-to-end compatibility.

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

C217C · P217

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.