Bell & Gossett MK MV (8201, 8201X) - Manual (Page 20)

Earthing (Grounding)
Electrical Hazard:
• You must earth (ground) all electrical equipment. This applies to the pump equipment,
the driver, and any monitoring equipment. Test the earth (ground) lead to verify that it is
connected correctly.
• If the motor cable is jerked loose by mistake, the earth (ground) conductor should be the
last conductor to come loose from its terminal. Make sure that the earth (ground)
conductor is longer than the phase conductors. This applies to both ends of the motor
cable.
• Risk of electrical shock or burn. You must connect an additional earth- (ground-) fault
protection device to the earthed (grounded) connectors if persons are likely to come
into physical contact with the pump or pumped liquids.
Connect the motor cable to the pump
CAUTION:
Leakage into the electrical parts can cause damaged equipment or a blown fuse. Keep the
end of the motor cable above the liquid level.
For more information about the cable entry, see the Parts list.
1. Remove the entry gland screw from the stator housing.
This provides access to the closed end splice.
2. Check the data plate to see which connections are required for the power supply.
3. Arrange the connections on the closed end splices in accordance with the required
power supply. in accordance with the required power supply.
4. Connect the mains leads (L1, L2, L3, and earth (ground)) according to applicable cable
chart.
The earth (ground) conductor must be 50 mm ( 2.0 in.) longer than the phase
conductors in the junction box of the unit.
5. Make sure that the pump is correctly connected to earth (ground).
6. Make sure that any thermal contacts incorporated in the pump are properly connected
to the closed end splices.
7. Install the entry gland screw on the stator housing.
Connect the motor cable to the starter and monitoring equipment
WARNING:
Do not install the starter equipment in an explosive zone unless it is explosion-proof rated.
NOTICE:
• Thermal contacts are incorporated in the pump.
• Thermal contacts must never be exposed to voltages higher than 250 V, breaking
current maximum 4 A. It is recommended that they are connected to 24 V over
separate fuses to protect other automatic equipment.
Installation
18 MK, MV (8201, 8201X) Installation, Operation, and Maintenance Manual