Gardner Denver ESM 30, Original User Manual

Page: 34 / 60

6. Preparations for commissioning
34
Recommended supply cable cross-sections and fuses for multi-wire cables or three current-carrying
conductors in raceway based on 86 °F ambient temperature
Line cross section
conductor rated
Compressor type Supply
voltage
Installed
nominal motor
power
Fuse(s)
protection
(slow-blow
fuse) class J
140°F 167°F 194°F
[V] [hp] [A]
60-Hz-compressors
200V 175 AWG4/0 AWG3/0 AWG2/0
230V 150 AWG3/0 AWG2/0 AWG1/0
460V 70 AWG3 AWG4 AWG4
ESM 30
575V
40
60 AWG4 AWG6 AWG6
200V 200 MCM250 AWG4/0 AWG3/0
230V 175 AWG4/0 AWG3/0 AWG2/0
460V 90 AWG2 AWG3 AWG4
ESM 37
575V
50
70 AWG3 AWG4 AWG6
200V 250 MCM350 MCM300 AWG4/0
230V 200 MCM300 AWG4/0 AWG3/0
460V 100 AWG1/0
AWG2
AWG2
ESM 45, ESM 50
575V
60
80 AWG2 AWG3 AWG4
An adequate electrical power supply of the correct
voltage must be provided. All control enclosure wiring
has been completed at the factory.
The electrical supply should be equipped with a fused
line disconnect switch or circuit breaker so that
electrical power may be disconnected while the unit is
being serviced.
The fuse line disconnect should be located and moun-
ted in accordance with all state, local, and national
regulations.
The unit must be properly grounded to provide adequa-
te ground fault protection. As a guide, it is suggested
that the ground wire be equal in size to one of the
conductors which feeds the compressor motor circuit.
Make certain the ground wire connections are clean
and tight.
The wire used to feed the compressor circuit should be
selected and sized based on the following conditions:
1. Motor full load amperage plus service factor.
2. Ambient temperature in the area where the wire is
located.
3. Length of wire
4. Insulation type
This information may be found in the latest edition of
the National Electrical Code.
When installing a unit in a "Hazardous Location"; that is
in a location where fire or explosion is a definite hazard,
refer to the appropriate section of the National Electrical
Code for further information.
Caution
IN ALL CASES, THE LOCAL, STATE, AND
NATIONAL ELECTRICAL CODES MUST BE
STRICTLY FOLLOWED.