Grounding, The pump motor, Wire size – Gasboy 70 Series User Manual
GASBOY Series 70 & 1820
MDE-4423B Series 70 and 1800 Consumer Elect Pumps Installation/Operation/Parts
To ensure proper operation of the equipment and provide the necessary safety factors, this unit
must be grounded. A ground wire (preferably green) must be connected between the unit's AC
junction box ground lug and the main electrical service panel. One (1) earth ground connection is
required per unit. The ground rod is to be a solid, corrosion-resistant conductor and must be
installed at the main electrical panel in accordance with the National Electrical Code. It should be
properly tied into the ground bus strip of the panel. We recommend the neutral and ground bus
strips be bonded together (unless prohibited by local codes).
THE PUMP MOTOR
Pumps are shipped from the factory with motors wired for either 115VAC, 60 cycle, or 230VAC,
The pump motor is equipped with thermal overload protection. If overheated, it will shut itself off
without any damage to the windings. Be sure to turn off the pump power if this occurs. As the
motor cools, it will start without warning if power is on.
The AC wire size of the AC power lines of a pump depends on the voltage at which the pump will
be operated (115/230) and the distance from the circuit breaker panel to the pump. When two
pumps 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.
Use the chart below to select the proper wire size for your installation.
Table 3-1. Wire Size
WIRE GAUGE SIZES FOR 1/3 HP MOTOR
25’ 7m 14 14
50’ 15m 14 14
100’ 30m 12 12
150’ 46m 10 12
200’ 61m 8
250’ 76m 8
300’ 91m 8
The AC wire size for the reset complete (switch detect) line should be 14 AWG (when it is used).