IEEE Std 1349-2011, IEEE Guide for the Application of Electric Motors in Class I, Division 2 and Class I, Zone 2 Hazardous (Classified) Locations

IEEE P1349, Draft Guide for the Application of Electric Machines in Zone 2 and Class I, Division 2 Hazardous (Classified) Locations

Scope

Three-phase and single-phase ac synchronous and induction electric machines in ratings 0.18 kW (1/4 hp) and larger are covered in this guide. Primary emphasis is on the use of open or nonexplosionproof or nonflameproof enclosed machines in Zone 2 and Class I, Division 2 locations as covered in National Electrical Code^(R) ( NEC^(R)) (NFPA 70-2020 and Canadian Electrical Code^(R)(CE code^(R)) (CSA C22.1-2018 Safety Standard for Electrical Installations) as applicable. Surface temperature test methods and sine wave and non-sine wave applications are covered. Precautions against excessive surface temperatures and sparking are included. To mitigate hot surface temperatures and sparking, this document provides guidance for selecting, operating, and maintaining machines in Zone 2 and Class I, Division 2 locations. This guide does not cover ac wound rotor machines and dc electric machines. Machines installed in locations other than Zone 2 and Class I, Division 2 as covered in NFPA 70-2020 or CSA C22.1 - 2018 are not covered in this guide. This document is not a specification and is not intended to be used as a specification for purchasing electric machines.

Purpose

Existing codes and standards contain cautionary notes for open or nonexplosionproof or nonflameproof enclosed machines in Zone 2 and Class I, Division 2 locations as covered in theNECand theCE code. This guide documents industry experience and established practices and provides guidance for applying machines in these locations.

(R) National Electrical Code & NEC are Registered Trademarks of NFPA. Canadian Electrical Code and CE Code are Registered Trademands of CSA.

This site is for the Standard Development by the Working Group Voting Members and Non-Voting Members.

Co-Chair, IEEE 1349 Working Group