Intrinsic Safety and Certification
What is Intrinsic Safety?
Intrinsic safety is a type of protection in which a portion of the electrical system (apparatus, circuits, and wiring) contains
only equipment that is incapable of causing ignition in the surrounding atmosphere. No single device or wiring is
intrinsically safe by itself (except for battery operated, self-contained apparatus such as portable pagers, transceivers,
gas detectors, etc., which are specifically designed as intrinsically safe, self-contained devices). Devices are intrinsi-
cally safe only when employed in a properly designed intrinsically safe system.
Certification
The Firecom 4100 Portable Intercom System is listed by SGS / United States Testing Company (USTC) as Intrinsically
Safe for use in certain hazardous atmospheres. Hazardous atmospheres can range from gas vapor to dust to flying
fibers. The listing by USTC indicates that Firecom's 4100 Portable Intercom System has undergone a series of tests
that demonstrate it is incapable of releasing a level of energy, either thermal or electrical, under normal or abnormal
conditions, that may cause ignition in a specific hazardous atmosphere.
The Firecom 4100 Portable Intercom System has been listed as Intrinsically Safe for use in Class I, II, and III,
Division 1, Groups A, B, C, D, E, F, G hazardous locations.
The following accessories can be used with the Firecom 4100 Portable Intercom System while maintaining full
compliance with the Intrinsically Safe listing:
Headset
Model CH-U
Model CH-FS
Model CH-LW
Extension Cables
Cable, 50 ft.
Cable, 100 ft.
Warning
Battery chargers sold with this unit are not Intrinsically Safe. Do not charge or change batteries in intrinsically safe
zones or hazardous environments.
Warning
Do not charge or change batteries in intrinsically safe zones or hazardous environments.
Warning
Substitution of components or unqualified service or maintenance will impair intrinsic safety. Contact Firecom for
intrinsically safe repair services.
2
SAFETY INFORMATION
Description
Under-the-helmet headset
Single-ear headset
Lightweight headset
Description
Abrasion resistant polyurethane
Abrasion resistant polyurethane
Part No.
105-0110-00
105-0115-00
105-0120-00
Part No.
108-0070-05
108-0070-10
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