Gasboy 9820A Series - Manual (Page 25)

Wiring
03/07/03 4-3
WIRE SIZE
The AC wire size for the Micro Feed and Neutral should be 14 AWG. This gauge of wire will be
sufficient for runs up to 300 feet from the breaker panel to the dispensing unit. Sites with
distances over 300 feet should use 12 AWG wire. In cases where multiple units are powered from
the same breaker through the same wires, the gauge of the wires should be increased to handle
the added load according to the distance from the breaker panel.
The AC wire size of the Pump Motor Feed, Pump Motor, Feed Neutral, and Neutral is
dependent upon the HP rating of the pump motor, the voltage at which the pump will be operated
(115/230 VAC), and the distance from the circuit breaker panel to the pump. The chart below
should be used as a guide in selecting the proper wire size according to the specific installation
requirements.
The AC wire size for the Slow Flow, Fast Flow lines should be 14 AWG (when they are used).
The DC wire size for the Pulser lines connecting the pumping unit to the register assembly must
use four conductor, 18 AWG shielded cable (Belden 89418, Gasboy P/N C08864). This cable
allows the pulser wires to run in the same conduit as the AC wiring for the short distance between
the pumping unit and the register assembly. Belden 89418 is rated as follows:
Gas and Oil resistant insulation & jacket
18 AWG tinned, stranded, copper
Four conductors
300 volt maximum operating voltage
Aluminum/Mylar shielded with drain wire
Twisted-pair shielded cable is highly recommended for the Pulse Output or RS-485 field wiring
(when they are used). This type of cable provides superior noise immunity and must be used for
distances over 100 feet or any time pulse output or RS-485 wiring is included in the same conduit
as the AC wires. This cable must meet the following specifications:
Conductor:
18 AWG stranded wire. 2 twisted-pairs.
Shield: Foil-wrapped 100% coverage and/or tinned copper braid 90% coverage
Drain Wire: Stranded, tinned copper, 20 AWG or larger/or braided shield
Voltage Rating: Maximum operating voltage of 600V
Environmental: Gas- and oil-resistant; suitable for wet or dry locations.
GASBOY can supply Belden 1063A (P/N C09655) which is a UL-Listed, 4-conductor cable that
meets the requirements listed above. NOTE: Belden 1063A is UL-Listed but not CSA listed.
Cable with a voltage rating of less than 600V must be installed in a conduit separate from all AC
wires.
See the GASBOY Fuel Management System Installation Manual for specific requirements.