FMRC Approved Equipment
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
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
WARNING: Failure to use an FMRC Approved Product unit with an FMRC Approved battery
or FMRC Approved accessories specifically approved for that product may result in the
dangerously unsafe condition of an unapproved radio combination being used in a
Unauthorized or incorrect modification of an FMRC Approved Product unit will negate the Approval
rating of the product.
INTRINSICALLY SAFE RADIO INFORMATION