NEMA Plug & Receptacle Configuration Reference: Wiring Diagrams & Ratings

How It Works

1. Enter the Marking

   Use the molded device marking, such as 14-50 or L14-30, as a local lookup prompt. Verify against the selected product datasheet.

2. Filter Local Rows

   Filter by voltage, amperage, grounding, and locking type to narrow the local source-gap table.

3. Review Source Warnings

   Treat the row and conceptual pin view as prompts for NEMA WD 6, UL/listing, manufacturer, NEC, and AHJ review.

4. Check Equipment Context

   Confirm appliance, EVSE, generator, RV, welder, or temporary-power requirements from the actual nameplate and instructions.

5. Send for Qualified Review

   Use qualified electrical review for wiring, conductor/OCPD sizing, GFCI, grounding, transfer equipment, permits, and inspection.

Built For

• Electricians screening existing device markings before product and code verification
• Maintenance teams documenting local receptacle context before qualified review
• RV or generator owners checking row prompts before inspecting pedestals, inlets, and transfer equipment
• Welders and fabricators comparing nameplate requirements before electrician review
• Industrial teams reviewing locking-connector context before listed product selection
• EVSE planning teams flagging 14-50 and 6-50 review gaps before installation decisions
• Inspectors and estimators capturing source-gap notes before AHJ or product-data review

Features & Capabilities

Source-Aware Local Rows

Screens common straight-blade and locking NEMA rows while labeling them as local source-gap fixtures.

Conceptual Pin Prompts

Visual prompts help with identification, but manufacturer diagrams and listed markings control wiring.

Voltage and Amperage Filters

Filter by simplified voltage and amp labels before checking the selected product and adopted code.

Application Review Prompts

Flags dryer, range, EVSE, welder, RV, generator, and temporary-power contexts as review items.

Grounding and Legacy Warnings

Ungrounded and legacy rows are warning prompts, not approval for new work or continued use.

PDF Export

Export source-aware lookup notes for review packets, job folders, or customer education.

Assumptions

• Local rows are source-gap prompts that require current NEMA WD 6 review before standards use.
• Voltage and amperage labels are simplified row context, not load calculation or device approval.
• Grounding labels require adopted-code, product-marking, and field-wiring verification.
• Conceptual pin prompts are not manufacturer wiring diagrams or certified blade-pattern drawings.
• Phase labels require actual system voltage, equipment nameplate, and qualified review.
• Hospital-grade, isolated-ground, weather-resistant, tamper-resistant, and other listed variants are not separately validated.

Limitations

• Does not validate licensed NEMA WD 6 dimensions, UL/listed product files, or manufacturer drawings.
• Does not select conductors, raceways, OCPD, GFCI, transfer equipment, inlets, grounding, bonding, or weather ratings.
• Does not evaluate EVSE, generator, RV pedestal, temporary-power, marine, or industrial pin-and-sleeve requirements.
• Does not verify tamper-resistant, weather-resistant, self-grounding, hospital-grade, isolated-ground, or enclosure features.
• Does not verify terminal markings, torque, strain relief, cord compatibility, or installation instructions.
• Does not provide permits, inspections, AHJ approval, safe-work procedure, or safe-to-energize authorization.

References

• ANSI/NEMA WD 6 source page - Wiring Devices: Dimensional Specifications
• UL 498 source page - Attachment Plugs and Receptacles
• NFPA 70 National Electrical Code source pointer
• OSHA 1910.303 general electrical requirements source pointer
• OSHA 1926 Subpart K construction electrical source pointer
• NIST SP 811 unit context

Frequently Asked Questions