9
INSTALLATION (CONT’D)
ELECTRICAL POWER SUPPLY
It is essential that the power supply and the supply wiring are adequately sized and that the voltage
correspond to the unit specifications. Branch circuit protection must be provided at installation a specified
in the National Electrical Code.
All wiring should be preformed by a licensed electrian or electrical contractor. Wiring must meet applicable
codes for area of installation. The table gives recommended wire sizes based on the 1999 NEC.
WIRE SIZE (AWG) - 75°C COPPER - 30°C AMBIENT
MOTOR
HP
3 PHASE
1 PHASE
200/208V
230V
460V
575V
115V
208V
230V
1-1/2
14
14
14
14
10
14
14
2
14 (14)
14 (14)
14 (14)
14 (14)
8 (6)
12 (10)
12 (10)
3
14 (10)
14 (12)
14 (14)
14 (14)
8 (4)
10 (8)
10 (8)
5
10 (8)
12 (8)
14 (12)
14 (12)
--
8 (6)
8 (6)
7-1/2
8 (6)
10 (6)
14 (10)
14 (10)
--
6 (3)
6 (4)
Values in ( ) for Duplex Unit w/one incoming power line to both motors.
All models require a properly sized magnetic starter as specified in the National Electric Code (NEC).
See Figure 1-1 for simplex wiring diagram and Figure 1-2 for duplex wiring diagram.
If ordered with a factory mounted magnetic starter, compressor is wired at factory. It is necessary only to bring lines
from a properly sized disconnect switch to the magnetic starter mounted on the unit.
Figure 1 - Simplex Wiring Diagram
305CAS546-B
(Ref. Drawing)
304CAS546-A
(Ref. Drawing)
