scope:

This standard is used in conjunction with the following other standards and standards listed in Paragraph 2.3:

Note: In the event of a conflict between the requirements of this general standard and one of the following specific standards, the requirements of the specific standard shall take precedence.

The following standards are applicable to electrical equipment for Class I, II, or III, Division 1 or 2 hazardous (classified) locations.

• FM 3610;

• FM 3611;

• FM 3613;

• FM 3615;

• FM 3616;

• FM 3620; and

• FM 6320.

The following standards are applicable to electrical equipment for Class I, Zone 0 ; Class I, Zone 1; Class I Zone 2; Zone 20; Zone 21; or Zone 22 hazardous (classified) locations.

• ANSI/UL 60079-0;

• ANSI/UL 60079-1;

• ANSI/UL 60079-2;

• ANSI/UL 60079-5;

• ANSI/UL 60079-6;

• ANSI/UL 60079-7;

• ANSI/UL 60079-11;

• ANSI/UL 60079-15;

• ANSI/UL 60079-18;

• ANSI/UL 60079-31;

• ANSI/ISA 61241-0;

• ANSI/ISA 61241-1;

• ANSI/ISA 61241-11; and

• ANSI/ISA 61241-18.

Application

This standard shall apply to:

a) Electrical equipment or parts of electrical equipment rated for use in Hazardous (Classified) Locations as defined by the National Electrical Code^® (NEC^®), ANSI/NFPA 70;

b) Associated equipment located outside of the hazardous (classified) location whose design and construction may influence those parts of the equipment within the hazardous (classified) location.

Purpose

This standard identifies the basis for Approval of electrical equipment for use in hazardous (classified) locations.