NFPA 791: Recommended Practice for Unlabeled Electrical Equipment Evaluation, 2021 Edition, is a technical reference for professionals involved in evaluating electrical equipment that does not carry a recognized product certification or label. Identified by ISBN 9781455929443, this publication focuses on recommended practices and procedures for assessing unlabeled electrical equipment and determining its suitability for the intended application.
Evaluating equipment without a familiar certification mark can present challenges for electrical inspectors, field evaluation specialists, engineers, and other professionals responsible for electrical safety. NFPA 791 provides a framework for approaching these evaluations systematically, helping professionals understand the role of equipment assessment in the broader electrical safety process.
The publication addresses key stages of the evaluation process, including preparation before a site visit, construction inspection, electrical testing, and reporting and documentation. Its coverage also includes electrical code considerations, enclosures, disconnecting means, overcurrent protection, wiring, markings, grounding, and equipment identification. These topics help explain the practical considerations involved in examining equipment that requires a closer assessment.
NFPA 791 is particularly relevant to field evaluation bodies (FEBs) and authorities having jurisdiction (AHJs). It outlines recommended procedures for evaluating equipment against applicable nationally recognized standards and considering the requirements of the relevant authority. The guidance also addresses how evaluation results are documented, discrepancies are reported, and field evaluation labels are handled.
For electrical engineers, inspectors, compliance specialists, and professionals involved in equipment approval, this edition offers a focused reference for understanding field evaluation procedures. It can help readers become familiar with the relationship between equipment evaluation, applicable electrical standards, and decisions about whether equipment is suitable for a particular installation.
This 2021 edition of NFPA 791: Recommended Practice for Unlabeled Electrical Equipment Evaluation is identified by ISBN 9781455929443. For professionals who assess unlabeled electrical equipment, review field evaluation documentation, or work with equipment acceptance procedures, this publication provides a dedicated reference for understanding the evaluation process and its role in electrical safety.
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