Wiring Information for Standard Three Phase Electric Motors

Motor normally supplied connected 400 volts

Wiring diagrams – It is essential that the motor is connected to the supply in accordance with the relevant diagram and instructions for that motor. If for any reason the diagram is not available/unreadable of the installer is unsure then please contact our works for instructions prior to connection. Also ensure that any installation complies with current electrical and safety regulations.

Rotation – Connection of the supply L1, L2, L3 (R, S, T) as shown above will give clockwise rotation (facing shaft end). To reverse rotation, interchange any two phases of supply connections.
Attempting to run it in the wrong direction can often damage machinery.

General Connection/Supply Information

The terminal box on a standard single speed motor contains 6 winding terminals and at least on earth terminal.

Motors that have been specified with thermistors, anti-condensation heaters or switches will have extra terminals for these items inside the terminal box.

Earthing must be carried out in accordance with current regulations before the machine is connected to the power supply.

The body of the motor should be bonded to earth using the external earth screw.

The voltage is shown on the motor