Gasboy TopKAT Fuel Management System Installation - Manual (Page 23)

MDE-4319E TopKAT™ Fuel Management System Installation Manual · August 2008 Page 17
Wire Size General Installation
Suction Pumps
The TopKAT system, with Mechanical Interface or Mechanical PCU options, is capable of
directly driving pump motors up to 3/4 HP at 115 VAC or 1-1/2 HP at 230 VAC. A starter
relay must be used with pump motors that exceed this limitation. A separate circuit breaker
should be supplied for each pump to meet the current requirements and to allow isolated
control with the circuit breaker panel in case of problems.
Dispensers
The TopKAT system with the Mechanical Interface option is capable of directly driving
submersible pumps up to 3/4 HP at 115 VAC or 1-1/2 HP at 230 VAC. A dispenser with a
submersible pump exceeding this limitation requires the use of a submersible starter relay. A
separate circuit breaker should be supplied for each dispenser in cases where it will directly
drive the submersible pump. Dispensers may be grouped together on a single breaker when the
submersible pump has its own breaker. It is recommended that no more than two dispensers be
powered from one breaker to maintain isolated control with the circuit breaker panel in case of
problems.
Wire Size
A wiring cable for AC power from the 9800 or ASTRA to the TopKAT system is supplied
with the TopKAT system. If you are wiring a pedestal TopKAT system or 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 wires should be stranded.
The specifications for the communication wire/cable size can be found in RS-485
“Communication Requirements” on page 19 and/or “RS-422 - SHMs” on page 22 in this
chapter.