3-7
3.5
Precautions for wiring work
Warning
Use high-quality wiring equipment and devices, and carry out wiring work
safely and securely according to the technical standards for electrical
facilities, as well as the indoor wiring regulations.
Only qualified personnel such as licensed electrical engineers are allowed
to carry out electrical wiring work. Unqualified persons are prohibited by
law to carry out wiring work, and it is very dangerous.
Warning
Securely connect the terminals of the power cable. Loose terminals may
cause the motor to run in open-phase condition, thus leading to motor
burnout.
Warning
Be sure to install a ground fault interrupter dedicated to the unit for the
power supply source. Failure to observe this may cause electric shock or
fire.
(1) Be sure to install a ground fault interrupter and an overload protection device on the primary
power side of the pump.
* When switching from an IE1 motor-equipped product, it is necessary to verify the applicability of
its ground fault interrupter and overload protection device. The starting current of Top Runner
efficiency (equivalent to IE3) motor-equipped products tends to become higher than that of
standard efficiency (IE1) motor-equipped products. If you have any questions, contact your
nearest office of Teral.
Note
When switching from an IE1 motor-equipped product, it is necessary to
verify the applicability of its protection device on the primary side of the
pump.
Failure to observe this may cause the protective device to trip on startup.
(2) Be sure to attach a ground wire to prevent an electric shock.
Connect the ground wire to the ground terminal inside the terminal box of the motor.
Warning
Be sure to attach a ground wire to the motor and perform grounding work.
Warning
Connecting a ground wire to gas pipe or water pipe is illegal and extremely
dangerous.
(3) Pass the power cable through a metal tube or a metal conduit for shielding, and connect a ground
wire to the outer surface of the tube.
