Rs-485, Wire size, Wire size chart – Gasboy 9120K Series Installation User Manual
Page 15: Model 9120k, Model 9820k, Rs-485 wire size, Wire size chart model 9120k model 9820k
MDE-4567C 9120K and 9820K Series AST Pumps Installation and Operation Manual · September 2008
Page 11
RS-485
Wiring
RS-485
For information regarding the RS-485 option, refer to
on
. Refer to
, along with the installation manual of the CFN Series System for proper
wiring.
Wire Size
The AC wire size of the Pump Motor Feed (power supplied to unit for driving motor), Pump
Motor (power from unit to motor), Neutral Feed (Neutral supplied to unit for driving motor)
and Neutral (power from unit to the motor) is dependent upon the HP rating of the Pump
Motor, the voltage at which the pump will be operated (115 VAC or 230 VAC International),
and the distance from the circuit breaker panel to the pump.
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 chart below should be used as a guide in selecting the proper wire size according to the
specific installation requirements.
Wire Size Chart
115 Volt Wire Gauge Sizes per Feet of Run
Motor
HP
25'
50'
100'
150'
200'
250'
300’
Over 300', Use Relay at
Motor Location
1
14
12
10
8
6
6
4
230 Volt Wire Gauge Sizes per Feet of Run
1
14
12
12
10
10
10
8
Model 9120K
The AC wire size for the Switch Detect lines must be 14 AWG (when they are used).
The Direct Current (DC) wire size for the Pulser lines must be 18 AWG (when they are used).
Model 9820K
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 pumping unit. Sites with
distances over 300 feet should use 12 AWG wire.
The AC wire size for the Slow Flow and Fast Flow lines should be 14 AWG (when they are
used).