Rockwell Automation Publication 750-IN100B-EN-P - July 2017 101
Power Wiring Chapter 5
Power Cable Types
Acceptable for 400…690
Volt Installations
A variety of cable types are acceptable for drive installations. For an in-depth
discussion of cable types, including a table of maximum motor cable lengths,
refer to the Wiring and Grounding Guidelines for Pulse Width Modulated
(PWM) AC Drives, publication DRIVES-IN001
.
Selection Considerations
Motor Considerations
Due to the operational characteristics of AC variable frequency drives, motors
with inverter grade insulation systems designed to meet or exceed NEMA
MG1 Part 31.40.4.2 standards for resistance to spikes of 1600 volts are
recommended.
Guidelines must be followed when using non-inverter grade motors to avoid
premature motor failures. Refer to Wiring and Grounding Guidelines for Pulse
Width Modulated (PWM) AC Drives, publication DRIVES-IN001
for
recommendations.
ATTENTION: National codes and standards (NEC, BSI, and so forth) and local
codes outline provisions for safely installing electrical equipment.
Installation must comply with specifications regarding wire types, conductor
sizes, branch circuit protection, and disconnect devices. Failure to do so can
result in personal injury and/or equipment damage.
Type Description Min. Insulation Rating
Input
Power
(1)
(2)
(1) Signal wires should be separated from power wires by at least 0.3 meters (1 foot).
(2) The use of shielded wire for AC input power may not be necessary but is always recommended.
Standard
• Three tinned copper conductors with XLPE insulation.
• Maximum 500 MCM conductors.
• Copper braid/aluminum foil combination shield and
tinned copper drain wire, three drain wires per cable
assembly.
•PVC jacket.
600V,
75 °C (167 °F)
(3)
(3) The minimum insulation rating for input power wire must be at least equal to the nominal system voltage rating.
Motor Standard 400…600V systems:
600V, 75 °C (167 °F)
690V systems:
2000V, 75 °C (167 °F)
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