MK Plastics Inline Fan IO&M - Manual (Page 6)

Wiring Installation
All wiring should be in accordance with local ordinances and the National Electrical Code, NFPA 70. Ensure the power supply
(voltage, frequency, and current carrying capacity of wires) are in accordance with the motor nameplate.
Lock off all power sources before unit is wired to power source.
Leave enough slack in the wiring to allow for motor movement when adjusting belt tension. Some fractional motors have to be
removed in order to make the connection with the terminal box at the end of the motor. To remove the motor, remove bolts
securing motor base to power assembly. Do not remove motor mounting bolts. The fans will have a hole provided at the base of
the bearing pedestal to accommodate wiring.
Personal Safety
Disconnect switches are recommended. Place the disconnect
switch near the fan in order that the power can be swiftly cut
off in case of an emergency, and in order that maintenance
personnel are provided complete control of the power source.
Follow the wiring diagram in the disconnect switch and the wiring diagram provided with the motor. Correctly label the
circuit on the main power box and always identify a closed switch to promote safety (i.e. red tape over a closed switch).
Wiring Diagrams
Single Speed, Single Phase Motor
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4 leads.
3 Phase, 9 Lead Motor
To reverse, interchange any 2 line leads.
2 Speed, 2 Winding, Single Phase Motor
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-1 and T-4 leads.
2 Speed, 1 Winding, 3 Phase Motor
To reverse, interchange any 2 line leads. Motors require magnetic
control.
Single Speed, Single Phase, Dual Voltage
When ground is required, attach to ground A or B with No. 6 thread
forming screw. To reverse, interchange T-5 and J-10 leads.
2 Speed, 2 Winding, 3 Phase
To reverse: High speed-interchange leads T11 & T12.
Low speed-interchange leads T1 & T2. Both speeds-interchange any
2 line leads.
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