UL 121201
Nonincendive Electrical Equipment for Use in Class I and II, Division 2 and Class III, Divisions 1 and 2 Hazardous (Classified) Locations

DETAILS
Edition Number:9SCC Approved:--
Edition Date:2017-09-15DOD Approved: --
Price Code:EANSI Approved: 2017-09-15
Type:ulcsa

  • SCOPE

    2 Reference publications

    2.1 Products covered by this standard shall comply with the referenced installation codes and standards noted in Annex A.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • UL Harmonized Standard Title Page
    • Table of Contents
      • Body
        • 1 Scope
          • 1.1 Introduction
          • 1.2 Applicable to Class I and II, Division 2 and Class III, Divisions 1 and 2 locations
          • 1.3 Applicable to associated nonincendive field wiring apparatus
          • 1.4 Applicable ambient conditions
          • 1.5 Not applicable to specified ignition mechanisms
          • 1.6 Not applicable to specific products
        • 2 Reference publications
        • 3 Definitions
        • 4 General requirements
          • 4.1 Requirements based upon normal operating conditions
          • 4.2 General-purpose requirements
          • 4.3 Consideration of subsequent conditions following nonincendive field wiring faults
          • 4.4 Component standards
        • 5 Requirements for Class I, Division 2 equipment
          • 5.1 General
          • 5.2 Enclosures
          • 5.3 Fuses used in circuits subject to overloading
          • 5.4 Fuses replaceable from outside of the enclosure
          • 5.5 Circuit breakers
          • 5.6 Batteries and battery-powered equipment
        • 6 Requirements for Class II, Division 2, Class III, Divisions 1 and 2 equipment
          • 6.1 Protection methods
          • 6.2 Portable battery-powered equipment
          • 6.3 Thermal ignition
          • 6.4 Gasket and seal specification
        • 7 Nonincendive circuits and nonincendive field wiring
          • 7.1 Spark ignition evaluation
          • 7.2 Nonincendive circuit evaluation
          • 7.3 Evaluation by analysis
          • 7.4 Associated nonincendive field wiring apparatus
          • 7.5 Nonincendive field wiring apparatus
          • 7.6 Nonincendive field wiring circuit
          • 7.7 Interconnection of nonincendive field wiring apparatus with associated nonincendive field wiring apparatus
        • 8 Normally nonarcing components
          • 8.1 Components considered as nonarcing in normal operation
          • 8.2 Connectors and plug-in components
          • 8.3 Plug-in fuses that can be replaced in normal operating conditions
          • 8.4 Circuit breakers
          • 8.5 Lamps
          • 8.6 Connectors
          • 8.7 Manually operated components
          • 8.8 Connections on exterior of enclosure
        • 9 Marking
          • 9.1 General-purpose marking
          • 9.2 Hazardous location related marking
          • 9.3 Information for battery-powered equipment
          • 9.4 Nonincendive field wiring connections
          • 9.5 Optional zone marking (US only)
          • 9.6 Alternate use of Division parameter designations for nonincendive field wiring
          • 9.7 Connectors and lampholders
          • 9.8 Fuseholders
          • 9.9 Circuit breakers
          • 9.10 External plugs and sockets
          • 9.11 Oil immersed equipment
          • 9.12 Multiple warning markings
        • 10 Surface temperature requirements
          • 10.1 Determination of maximum surface temperature
          • 10.2 Surface temperature
          • 10.3 Surface temperature of small components
        • 11 Spark ignition testing of nonincendive circuits
          • 11.1 Spark test apparatus
          • 11.2 Ignition test conditions
        • 12 Evaluation of nonincendive components
          • 12.1 Ratings, preconditioning, and test for nonincendive components
          • 12.2 Spark ignition test for nonincendive components
        • 13 Evaluation of sealed devices
          • 13.1 Ratings, construction, preconditioning, and test for sealed devices
          • 13.2 Air leakage test
        • 14 Evaluation of enclosed-break devices
          • 14.1 Ratings, construction, preconditioning, and test for enclosed-break devices
          • 14.2 Tests for enclosed-break devices
        • 15 Enclosure ingress protection for Class II and III
          • 15.1 Construction and tests for enclosures
          • 15.2 Dust-blast method
          • 15.3 Circulating dust method
          • 15.4 Atomized-water method
          • 15.5 Gasket test
          • 15.6 Temperature aging
        • 16 Drop tests and impact tests
          • 16.1 Portable equipment
          • 16.2 Drop test for portable equipment
          • 16.3 Impact test for fixed or stationary equipment used in Class I location
          • 16.4 Impact test for fixed or stationary equipment used in Class II or Class III location
        • 17 Evaluation of an oil immersed equipment
          • 17.1 General
          • 17.2 Enclosure
          • 17.3 Oil requirements
          • 17.4 Temperature test
        • 18 Manufacturer’s instructions
          • 18.1 Information in addition to that required by general-purpose standards
          • 18.2 Information for connections on exterior of enclosure
          • 18.3 Information for equipment with nonincendive field wiring connections
          • 18.4 Information for component replacement or equipment disconnection
          • 18.5 Information for equipment containing nonincendive components
    • Annex A – Normative References(normative)
    • Annex B – Common Standards – Safety Requirements for Electrical Equipment(informative)
    • Annex C – Suggested Warnings with French Equivalent(informative)