MDE-4319A TopKAT Fuel Managment System Installation Manual · November 2005
Page 15
Wire Size
General Installation
Wire Size
A wiring cable for AC power from the 9800 or ASTRA to the TopKAT is supplied with the
TopKAT. If wiring a pedestal TopKATor wall-mount Mechanical PCUs, the AC power wire
size must be 14 AWG or larger for runs of up to 300 feet from the breaker panel to the system.
Sites with distances over 300 feet must use 12 AWG wire or larger.
The AC wire size for power of the system data terminal or external modem must be 14 AWG
or larger. This gauge of wire will be sufficient for runs of up to 300 feet (91m) from the
breaker panel to the system. Components with distances over 300 feet (91m) must use 12
AWG wire or larger. All wire should be stranded.
The specifications for the communication wire/cable size can be found in RS-485
“Communication Requirements” on page 17
and/or
“RS-422 - Short Haul Modems” on
later in this section.
Mechanical Interface Option
The AC wire size for a suction pump is dependent upon the HP rating of the pump motor, the
voltage at which the pump will be operated (115/230), and the distance from the circuit
breaker panel to the pump. The chart below may be used as a guide in selecting the proper size
wire according to the specific installation requirements. The wire size for the reset complete
from the pump should be 14 AWG. All wire should be stranded.
The AC wire size for the control lines of a dispenser should be 12 AWG. These control lines
supply power for the reset mechanism, solenoid valve, and submersible starter relay (when the
submersible pump is not directly powered by the dispenser). The wire size for the submersible
pump power depends upon the HP rating of the pump motor, the voltage at which it will be
operated (115/230), and the distance from the circuit breaker to the pump. Use Table 2-1 as a
guide in selecting the proper size wire according to the specific installation requirements. The
wire size for the reset complete from the dispenser should be 14 AWG. All wire should be
stranded.
The DC wire size for the pulser must be 18 AWG (when they are used). Shielded cable, as
described in
“Pulser Wiring Notes” on page 46
allows pulser lines to run with the AC wires.
The DC wire size for the RS-422 lines should be 18 AWG and meet the specifications outlined
in
“Communication Requirements” on page 17
See
“Communication Requirements” on page 17
to determine the wire size and type for the
communication wiring for your specific application.
