This part of IEC 60079 is intended to enhance the safety of personnel by providing minimum
requirements for electrical ignition systems for spark-ignited reciprocating internal combustion
engines, parts of which provide Equipment Protection Level (EPL) Gc.

This document provides minimum construction and test requirements, in addition to
manufacturer installation and maintenance recommendations, for the safe operation of ignition
systems and components for spark-ignited reciprocating internal combustion engines providing
EPL Gc for equipment Group IIB+H2, IIB or IIA. These requirements apply to systems rated for
normal operation with secondary voltages less than or equal to 60 kV.

This document applies only to the ignition systems or the individual ignition system components
used on reciprocating internal combustion engines that are stationary when in operation and
mobile machinery where the internal combustion engine can be potential source of ignition.
Applications addressed by the scope of this document include but are not limited to gas
compressors, electric power generators, forklift trucks, and pumps.

This document does not apply to:
a) Engine ignition systems that utilize a breaker point or magneto type ignition systems as
these would not be suitable for use in a hazardous area.
b) Road vehicles.
c) Low voltage parts and electrical installation that are not included in the ignition system, such
as various sensors and thermocouples, throttle actuator(s), fuel control valve(s), human
machine interface (HMI), respective harness and wiring and all the other items that might
belong to the integrated control system besides the ignition system.

This document supplements and modifies the general requirements of IEC 60079-0 and the
requirements of ISO/IEC 80079-41. Where a requirement of this document conflicts with
IEC 60079-0 or ISO/IEC 80079-41, the requirement of this document takes precedence.

NOTE See ISO/IEC 80079-41 for the requirements for explosion protection for EPL Gc reciprocating internal
combustion engines.

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