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Electrical Requirements
6. Pumps installed in locations regulated by the International Electrotechnical Commission (IEC) standards shall
be supplied by an isolation transformer or supplied through a residual current device (RCD) having a rated
residual operating current not to exceed 30 mA.
7. It will be necessary to confirm that the rotation of the motor is in the correct direction on all three-phase pump
units and on certain single-phase pump units. Check wiring diagram to determine if motor can be field wired
to rotate in both directions. Checking rotation by energizing the pump for one second and then watching the
rotation through the back of the motor as it coasts to a stop. Ensure that the rotation matches the direction
arrow on the pump. Operating a pump with the incorrect rotation can cause many problems including poor
priming, diminished water flow, excessive noise, overloading of the motor and premature failure of the pump.
Field Wiring
Wiring
Due to wide variation in electrical equipment, power equipment, power supply, and installation requirements, this
manual does not make specific recommendations concerning auxiliary equipment or fusing/wiring.
Wire sizing, wire type, branch circuit fuse protection, motor starter, control equipment, and related items must
meet National Electrical Code and local code requirements.
Motors are supplied by several manufacturers and nameplate data (service factor, maximum amperage, etc.)
will vary. Consult control manufacturer and motor nameplate on your pump to correctly choose and size motor
starter and control equipment for your particular installation. Specific electrical questions or problems should be
addressed to the manufacturer of the electrical component in question.
Voltage/Phase
Voltage at single-phase and three-phase ODP motors must be no lower than the minimum motor nameplate rated
voltage. If voltage is less than the rated voltage when motor is running at full load, consult power company.
Voltage at three-phase TEFC motors must be no more than 10% above or below motor nameplate rated voltage
or motor may overheat, causing overload tripping and reduced component life. If voltage is less than 90% or more
than 110% of rated voltage when motor is running at full load, consult power company.
Do not try to connect three-phase motors to single phase power supply or single phase motors to three-
phase power supply.
Emergency Shutoff
Install an Emergency Shutoff Switch near pool. Clearly mark this switch and mount it in a location that is
accessible to bathers or pool operating personnel (e.g. lifeguards). Make sure that all lifeguards and pool
personnel understand the switch's use in case of emergency (entrapment, electrical malfunction, etc.).
Always fill the pump with water before energizing the pump motor. Operating the pump without water can damage
the pump seal within a few seconds.
(Cont.)
EQ SERIES® High Performance Commercial Pump Installation and User' s Guide
7
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