GAI-Tronics 7245-005 SmartSeries Indoor Remote Subset Amplifier Enclosure - Manual (Page 5)

Pub. 42004-684L2B
Model 7245-005 Indoor Remote Subset Amplifier Enclosure Page: 5 of 9
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SmartSeries stations require 120 V ac power. The typical ac input current for Page/Party ® and
SmartSeries stations is less than 0.5 A
RMS
at full power output. GAI-Tronics system cable contains a No.
14 AWG wire triplet for distributing ac power to the stations. This wire can carry a maximum of
15 amps. Therefore, up to 30 SmartSeries stations can be connected to a single power circuit. Additional
stations must be powered by additional power circuits. Refer to the table below for power calculations.
Voltage drop must also be taken into consideration for long cable runs. The minimum operating voltage
for a GAI-Tronics station is 90 V ac and the resistance of No. 14 AWG cable is 26.8 ohms per loop mile.
Contact your nearest GAI-Tronics representative if you require assistance with system layout.
Page/Party ® Zone Power Calculation Table
The maximum power in any leg of a zone is limited to 120 V ac at 15 amps due to the wire size (No.
14 AWG) in the system cable. Therefore, the following calculations must be made when determining the
maximum number and type of units in a leg of the zone.
Number of handset stations, speaker amplifiers,
or SmartSeries Remote Terminal Units:
_______ × 0.50 amp = ________
Total current (<15 amps): _______
WARNING
• Do not install this equipment in hazardous areas. It may cause a safety hazard and consequent
injury or property damage.
• Do not disconnect equipment while energized.
• Ensure proper grounding to protective earthing.
Installation Guidelines:
• Refer to Figure 3 for a typical installation of desk-edge or desktop subsets stations in the knee-well of
the desk. Refer to Figure 4 for a typical installation of flush-mount subset stations.
• Do not install conduit from the top unless absolutely necessary. Side or bottom entry helps to prevent
moisture from dripping onto the terminals or printed circuit boards.
• When drilling or punching conduit openings, use caution to avoid damaging the internal electrical
components and wiring of the enclosure.
• Place the enclosure in a location that provides easy installation and removal of the connectorized
subset cabling, the plug-in amplifier, the speaker cabling, and the system cabling.
• Subsets designed for use with this enclosure contain 8-foot (244 cm) connectorized cables. This
enclosure should be mounted within reach of these cables.
• The recommended torque setting for securing the amplifier to the enclosure is 10 to 12 in-lbs. or 1.13
to 1.36 n-m.