9000X AF Drives User Manual
MN04001004E
For more information visit: www.eaton.com 3-1
June 2009
Chapter 3 — Power Wiring
Guidelines
To ensure proper wiring, use the following guidelines:
● Use heat-resistant copper cables only, +75°C or higher.
● The input line cable and line fuses must be sized in accordance with the rated input
current of the unit. See Tables 3-2 through 3-8.
● Provide a ground wire with both input power and output motor leads.
The control should be installed in accordance with all applicable codes. In accordance with
NEC 430 Part IV, a protective device is required in the installation of the control. This
protective device can be either a fuse or circuit breaker. An RK fuse is an acceptable
component. For maximum protection Eaton recommends a Class T fuse.
Input line cable and line fuses must be sized in accordance with Tables 3-2 through 3-6.
● If the motor temperature sensing is used for overload protection, the output cable size
may be selected based on the motor specifications.
● If three or more shielded cables are used in parallel for the output on the larger units,
every cable must have its own overload protection.
● Avoid placing the motor cables in long parallel lines with other cables.
● If the motor cables run in parallel with other cables, note the minimum distances
between the motor cables and other cables given in Table 3-1 below:
Table 3-1: Cable Spacings
● The spacings of Table 3-1 also apply between the motor cables and signal cables of
other systems.
● The maximum length of the motor cables is as follows:
– 1 – 2 hp, 230V units, 328 ft. (100m)
– All other hp units, 984 ft. (300m)
● The motor cables should cross other cables at an angle of 90 degrees.
● If conduit is being used for wiring, use separate conduits for the input power wiring,
the output power wiring, the signal wiring and the control wiring.
Minimum Distance Between
Cables in Feet (m) Cable in Feet (m)
1 (0.3) ≤ 164 (50)
3.3 (1.0) ≤ 656 (200)
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