continuous operation under ambient environmental conditions of minus 40 to
plus 70 degrees C minus 40 to plus 158 degrees F and humidity of up to 100
percent condensing or as normally encountered for the installed location.
All equipment shall be rated for continuous operation under the ambient
vibration conditions encountered for the installed location. Components
located in areas where fire or explosion hazards may exist because of
flammable gases or vapors, flammable liquids, combustible dust or ignitable
fibers or flyings, shall be rated and installed in accordance with Chapter
5 of NFPA 70 and as shown.
1.2.2.2
Hazardous Environments
Components and wiring located in areas where fire or explosion hazards may
exist because of flammable gases or vapors, flammable liquids, combustible
dust or ignitable fibers or flyings, shall be rated for the Classes,
Divisions, Groups and suitable for the operating temperatures and shall be
installed in accordance with Chapter 5 of NFPA 70 and as shown.
1.2.3
Electrical Requirements
**************************************************************************
NOTE: The designer will show characteristics of
each voltage source on the drawings.
**************************************************************************
The equipment shall operate from a voltage source as shown, plus or minus
10 percent.
1.2.4
Power Line Surge Protection
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NOTE: The designer will determine if any additional
inputs or outputs require surge protection and show
the requirement for them on the drawings, or in a
schedule.
**************************************************************************
All equipment connected to AC circuits shall be protected from power line
surges. Equipment shall withstand surge test waveforms described in IEEE
C62.41. Surge protection devices shall be selected based on voltages and
current ratings of components to be protected. Fuses shall not be used for
surge protection.
1.2.5
Communications Circuit Surge Protection
All communications equipment shall be protected against surges induced on
any communications circuit. All cables and conductors which serve as
communications circuit between the local processor and the central
processor shall have surge protection devices installed at each end.
Protection shall be provided at the equipment and additional triple
electrode gas surge protectors rated for the application on each wireline
circuit shall be installed within 1 m 3 feet of the building cable
entrance. Surge protection devices shall be selected based on voltages and
current ratings of components to be protected. Fuses shall not be used for
surge protection. The inputs and outputs shall be tested in both normal
mode and common mode using the following two waveforms:
a. A waveform with a 10 microsecond rise time, a 1000 microsecond
width, a peak voltage of 1500 volts and a peak current of 60 amperes.
SECTION 16792A
Page 6
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