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Chapter 2

Intrinsically Safe Radio Information

2.1

Anyone intending to use a radio in a location where hazardous concentrations of ﬂammable material

exist (hazardous atmosphere) is advised to become familiar with the subject of intrinsic safety and

with the National Electric Code NFPA 70 (National Fire Protection Association) Article 500 (hazardous

[classiﬁed] locations).

An Approval Guide, issued by Factory Mutual Research Corporation (FMRC), lists manufacturers and

the products approved by FMRC for use in such locations. FMRC has also issued a voluntary

approval standard for repair service ("Class Number 3605").

FMRC Approval labels are attached to the radio to identify the unit as being FM Approved for

speciﬁed hazardous atmospheres. This label speciﬁes the hazardous Class/Division/Group along

with the part number of the battery that must be used. Depending on the design of the portable unit,

this FM label can be found on the back of the radio housing or the bottom of the radio housing. Their

Approval mark is shown below.

WARNING: Do not operate radio communications equipment in a hazardous atmosphere

unless it is a type especially qualiﬁed (e.g. FMRC Approved) for such use. An explosion or

ﬁre may result.

WARNING: Do not operate the FMRC Approved Product in a hazardous atmosphere if it has

been physically damaged (e.g. cracked housing). An explosion or ﬁre may result.

WARNING: Do not replace or charge batteries in a hazardous atmosphere. Contact sparking

may occur while installing or removing batteries and cause an explosion or ﬁre.

WARNING: Do not replace or change accessories in a hazardous atmosphere. Contact

sparking may occur while installing or removing accessories and cause an explosion or ﬁre.

WARNING: Do not operate the FMRC Approved Product unit in a hazardous location with the

accessory contacts exposed. Keep the connector cover in place when accessories are not

used.

WARNING: Turn radio off before removing or installing a battery or accessory.

WARNING: Do not disassemble the FMRC Approved Product unit in any way that exposes

the internal electrical circuits of the unit.

Radios must ship from the Motorola manufacturing facility with the hazardous atmosphere capability

and FM Approval labeling. Radios will not be "upgraded" to this capability and labeled in the

ﬁeld.

A modiﬁcation changes the unit's hardware from its original design conﬁguration. Modiﬁcations can

only be done by the original product manufacturer at one of its FMRC audited manufacturing

facilities.

APPROVED

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