FIELD GUIDESource-led reference

P187 / Power / Connector

NEMA 5-20P plug

NEMA 5-20P is the plug form paired with the NEMA 5-20 receptacle family.

Also called 5-20P NEMA 5-20 plug 20 amp plug

The rotated blade is an identification clue, not permission to modify an outlet or adapter.

Look for

Compare the exact NEMA designation and equipment rating; do not defeat keying or grounding to make a plug fit.

Claim inspection dates: 2026-10-05, 2026-10-22 · Independent review pending

The useful distinction

Recognize it. Then verify it.

NEMA 5-20P is the plug form paired with the NEMA 5-20 receptacle family. [C187A]

Exact source example HBL5366C: construction: Cord-mounted straight-blade male5-20P plug;2pole3wire grounding. rating: 20A125VAC. temperature: -40C without impact to75C continuous. Exact named part only. Product specification is not a specimen measurement or interoperability approval. No physical compatibility, pin map or hardware validation is established. [C187B]

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 contacts3S196Three conductors are represented by the form; this is not a wiring diagram.
Dimensions / axis1.52 in manufacturer labelled length (HBL5366C); 1.52 in manufacturer labelled width (HBL5366C); 1.96 in manufacturer labelled height (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Connector roleplug (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Keying / polarizationTwo flat blades at right angles plus grounding blade in published oblique mating-face photo (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
ManufacturerHubbell Wiring Device-Kellems (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
SeriesInsulgrip (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.
Exact part / implementationHBL5366C (HBL5366C)S900Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. HBL5366C. Documented role: plug. Exact named part only. Product specification is not a specimen measurement or interoperability approval.

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

Report a correction to these facts →

Bounded facts, visible unknowns

Specifications and limits

NEMA 5-20P plug facts and limitations
Documented identificationNEMA 5-20P plug form. [C187A]
Mechanical dimensionsNo independently reviewed mechanical drawing in V36; do not use this page for fabrication, fit testing or tolerance work.
Engineering pinoutSource-checked engineering profile available; independent review pending. Open engineering profile →
Verified device listNot included. Check exact device and accessory documentation.
No electrical replacement approval.

Use the source-backed form or position count only for identification. Resolve ratings, protocol, direction, wiring, cable construction and exact device support from the relevant equipment and component documentation.

Before you connect

What to check

  1. Identify the exact connector family and variant from the equipment or cable documentation.
  2. Keep shape, contact count, protocol, electrical rating and device support as separate facts.
  3. Do not force, rewire or adapt a connector from this recognition record; resolve the remaining requirements first.
Trace a supported connection class →

What is not established

This field note does not approve a connection, adapter, cable assembly, rewiring scheme or fabricated part. It intentionally omits unsupported pin assignments and mechanical tolerances.

Your next step

Move from the form to the requirement.

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

Back to first citation ↑
C187ASource checked · pending review

Hubbell/Bryant distinguishes the NEMA 5-20P plug form from the 5-15 family.

Hubbell / Bryant · Wiring device frequently asked questions ↗

Locator: NEMA 5-15 and 5-20 plug/receptacle identification discussion
Access: public page. Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.

S196: full source recordInspect review dependencies → (private workspace)

Claim scope: V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.. Next review due 2027-01-03.

Back to first citation ↑
C187BSource checked · pending review

Exact source example HBL5366C: construction: Cord-mounted straight-blade male5-20P plug;2pole3wire grounding. rating: 20A125VAC. temperature: -40C without impact to75C continuous. Exact named part only. Product specification is not a specimen measurement or interoperability approval. No physical compatibility, pin map or hardware validation is established.

Hubbell Wiring Device-Kellems · HBL5366C straight-blade male plug specification ↗

Locator: pp.1-2; Dimensions; Electrical Ratings; photo; revisionfooter
Access: public pdf text. No independent technical review, hardware validation, specimen measurement or general interoperability approval. Exact scopes and unresolved fields remain controlling.

S900: full source recordInspect review dependencies → (private workspace)

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.. Next review due 2027-01-20.

Suggest a correction to this field note →

Put this field note to work.

Add to discovery trayRecord an unsaved candidate (private workspace)

Compare look-alikes: NEMA 5-15 versus 5-20 forms

Candidate selection does not confirm the identity or capabilities of your physical item.

Evidence behind this page

Scope first. Source second. Approval separate.

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

Page scope: catalogue_expansion_v36

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

S196 · Wiring device frequently asked questions

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

Within inspection window

Scoped support: Identifies NEMA 5-15P/R and 5-20P/R forms and notes the T-slot characteristic of a 5-20R receptacle.

Not established / limitations: Identification/reference scope only. V36 does not convert this source into a universal pinout, fabrication drawing, electrical approval or end-to-end compatibility verdict.

Locator: NEMA 5-15 and 5-20 plug/receptacle identification discussion

S900 · HBL5366C straight-blade male plug specification

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 P187 / HBL5366C. 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: pp.1-2; Dimensions; Electrical Ratings; photo; revisionfooter

Trace 2 claims to their source records

C187A · P187

Hubbell/Bryant distinguishes the NEMA 5-20P plug form from the 5-15 family.

Claim scope: V36 catalogue-expansion identification fact only; not independent technical approval, fabrication data, wiring instruction or end-to-end compatibility proof.

Source links: S196 · Evidence trail → (private workspace)

C187B · P187

Exact source example HBL5366C: construction: Cord-mounted straight-blade male5-20P plug;2pole3wire grounding. rating: 20A125VAC. temperature: -40C without impact to75C continuous. Exact named part only. Product specification is not a specimen measurement or interoperability approval. 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: S900 · 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.