Tait Orca 5000 - Page 20

A - 12 Servicing Intrinsically Safe radios June 2003 IPN: M5000-00-105
Table A-3: FM ratings
Approval Class Division Group Temperature Rating
Intrinsically Safe:
The unit is unable to
cause ignition under
normal or abnormal
operating conditions.
Class I:
Gas or petroleum type
environment.
Division 1:
Hazardous mixtures
are normally present.
Groups C & D:
Ethylene and pro-
pane gases.
T3C:
160°C
Incentive:
The unit is unable to
cause ignition under
normal operating con-
ditions.
Class I:
Gas or petroleum type
environment.
Division 2:
Hazardous mixtures
are present abnor-
mally.
Groups A, B, C & D:
Acetylene, hydrogen,
ethylene and propane
gases.
T3C:
160°C