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INSTALLATION INSTRUCTIONS (CONTINUED)
Wiring
Improperly grounded motors are shock hazards. Make sure all the equipment is properly grounded.
All wiring and electrical connections must be performed by a qualified electrician familiar with induction motor
controls. Installations must be in accordance with local and national codes.
Overheating, short circuiting and fire damage will result from inadequate wiring.
Disconnect, tag and lock out power source, then release all pressure from the system before attempting to install,
service, relocate or perform any maintenance.
Damage to the motor from improper electrical voltage or connection will void the warranty.
Wiring must be installed in accordance with National Electrical Code and local codes and standards that
have been set up covering electrical apparatus and wiring. These should be consulted and local ordinances
observed. Be certain that adequate wire sizes are used, and that:
•
Service is of adequate ampere rating.
•
The supply line has the same electrical
characteristics (voltage, cycles and phase) as
the motor. Refer to motor name plate for
electrical ratings and specifications.
•
The line wire is the proper size and that no
other equipment is operated from the same
line. The chart gives minimum recommended
wire sizes for compressor installations.
•
Use a slow blow fuse type T or a 240 Volt
double pole circuit breaker.
Make sure voltage is correct with the motor wiring.
NOTE: If using 208 volts single phase, make sure the motor name plate states it is rated for 208 volts single phase. 230
volt single phase motors do not work on 208 volts unless they have the 208 volt rating.
1-4 HP
Recommended wire sizes may be larger than the minimum set up by local ordinances. If so, the larger size wire
should be used to prevent excessive line voltage drop. The additional wire cost is very small compared with the cost
of repairing or replacing a motor electrically "starved" by the use of supply wires which are too small.
WIRING INSTRUCTIONS
1.
Inspect the source wiring before continuing with installation. Confirm voltage with volt meter line-to-
ground (see Figure 7).
Volt meter should read 120 Volts.
Confirm voltage with volt meter line-to-line Volt meter should read 230 / 240 Volts (see Figure 8).
Volt Meter -
120 Volts
Figure 7
Minimum Wire Size (Use 75°C Copper Wire)
HP
5.0
Line Wire
Line Wire
Ground Wire
Figure 6
Amps
up to 22.0
Volt Meter -
230/240 Volts
Figure 8
10
Single Phase
230V
10 AWG
8 AWG
Line Wire
Line Wire
Ground Wire
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