Electrical Installation 4-1
4
Electrical Installation
4.1
Overview
This chapter explains the electrical installation of the drive. It covers grounding, input
power, motor output, dynamic braking, bus connections, and basic control connections.
Since control signals vary from application to application, specific wiring instructions are
discussed in the application documentation.
4.2
Wiring Requirements
Follow the instructions below to ensure safe, reliable electrical connections.
4.2.1
Standards and Codes
All wiring must conform to applicable local and national codes.
!
Attention
The supplier cannot assume responsibility for compliance or noncompliance
to any code governing the proper installation of this unit. The following
information is intended only as a guide for proper installation. All wiring
must conform to the National Electrical Code (NEC), described in
publication NFPA No. 70. Local codes may overrule this information.
4.2.2
Conductors
Size conductors according to the National Electrical Code (NEC) based upon the required
current-carrying capacity. All wires should be stranded copper with a rating of 167° F
(75° C) or higher.
Wires terminating in terminal blocks must meet the gauge limitations of the terminal as
well. Acceptable wire sizes for ground and power connection terminals are specified in
Table 4-4 through Table 4-9 and for control signal connection terminals in Table 4-19.
Wires terminating at studs or bolts must use ring lugs to provide a solid connection. Use
UL-approved lugs suitable for the currents required. For these connections, Table 4-4
through Table 4-9 list the stud or bolt size rather than the acceptable wire size.
4.2.3
Tightening Torque
Tighten connections by applying the recommended tightening torque listed in Table 4-4
through Table 4-10 (for ground and power connections) and in Table 4-19 and (for
control signal connections). Use a torque wrench to ensure that connections are properly
tightened.
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