NFPA 791, Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation

NFPA^® 791 Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation, R2024 Edition

Chapter 1 Administration

1.1 Scope.
1.2 Purpose.
1.3 Application.

Chapter 2 Referenced Publications

2.1 General.
2.2 NFPA Publications. (Reserved)
2.3 Other Publications.
2.4 References for Extracts in Recommendations Sections.

Chapter 3 Definitions

3.1 General.
3.2 NFPA Official Definitions.
3.3 General Definitions.

Chapter 4 Pre-Site Preparation

4.1 Pre-Site Information.
4.2 Used Equipment.
4.3 Standard(s).
4.4 Jurisdictional Notification.

Chapter 5 Construction Inspection

5.1 General.
5.2 Electrical Code Considerations.
5.3 Construction of Enclosures.
5.4 Disconnecting Means.
5.5 Main Overcurrent Protection Device (OCPD).
5.6 Field Terminations.
5.7 Components.
5.8 Overcurrent Protection.
5.9 Maintenance Receptacles and Lighting.
5.10 Wiring.
5.11 Markings.
5.12 Grounding.
5.13 Distances Between Exposed Energized Parts.

Chapter 6 Electrical Testing

6.1 Application.
6.2 Electrical Tests.

Chapter 7 Reporting and Documentation

7.1 Report.
7.2 Discrepancies and Nonconformities.
7.3 Engineering Report Documentation.
7.4 Summary.
7.5 Conditions of Acceptability.
7.6 Standards.
7.7 Equipment Identification and Nameplate.
7.8 Evaluation Procedures.
7.9 Evaluation.
7.10 Appendices or Attachments.

Chapter 8 FEB Label

8.1 Label Application.
8.2 Label Contents.
8.3 Label Location.
8.4 Label Control.

Annex A Explanatory Material
Annex B Multiple Units of Same Equipment
Annex C Informational References

2021 Edition

Reference the most current requirements for evaluating unlabeled electrical equipment with NFPA 791.

Certification is a conventional means of demonstrating the conformance of products to an applicable safety standard. NFPA 791, Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation, provides authorities having jurisdiction (AHJs) information about recommended evaluation procedures for unlabeled electrical equipment to aid in determining acceptability of evaluation results reported by recognized third-party field evaluation bodies (FEBs).

Used in conjunction with NFPA 790, Standard for Competency of Third-Party Field Evaluation Bodies, the recommended practice provides a consistent and reliable evaluation process that facilitates acceptance of results.

NFPA 791 covers:

• Practices and procedures for evaluating unlabeled electrical equipment
• Determining the acceptability of evaluation results reported by recognized third-party field evaluation bodies (FEBs)
• Evaluating multiple units of the same equipment

The 2021 edition was updated to reflect industry knowledge and methodologies.

From pre-site preparation and construction inspection to electrical testing, reporting and documentation, and FEB labeling, NFPA 791 offers the most relevant information and requirements for evaluating unlabeled electrical equipment. (Print, 12 pp., 2021)

2018 Edition

Work to ensure electrical product safety by following NFPA 791, Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation.

NFPA 791, Recommended Practice and Procedures for Unlabeled Electrical Equipment Evaluation covers recommended procedures for evaluating unlabeled electrical equipment for compliance with nationally recognized standards. Equipment must be capable of being installed in accordance with the NFPA 70^®, National Electrical Code^® (NEC^®).

A companion to NFPA 790, Standard for Competency of Third-Party Field Evaluation Bodies, NFPA 791 addresses the process in a consistent and reliable manner, thereby facilitating acceptance of results.

NFPA 791 provides Authorities Having Jurisdiction (AHJs) with industry approved recommended practices and procedures for:

• Evaluating unlabeled electrical equipment
• Determining the acceptability of evaluation results reported by recognized third-party evaluation bodies
• Evaluating multiple units of the same equipment

Changes in the 2018 edition of NFPA 791 include:

• An updated reference to the NEC edition date in Chapter 2, and a reaffirmed date for ASQ Z1.4, Sampling Procedures and Tables for Inspection by Attributes in Annex C
• Edits that refer to applicable nationally recognized standard(s) and clarify the purpose of the document
• Changes in Sections 5.8 and 5.11 that relate to overcurrent protection and marking for fuses and replacement elements

NFPA 791 is used to inform AHJs and provide recommended procedures for third-party field evaluation bodies (FEBs) to perform evaluations in a consistent and reliable manner. (Print, 20 pp., 2018)

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