QUICKSTART GUIDE
Electrical Installation
2
Electrical Installation
Wiring Guidelines
1.
Wire directly to the service entrance. Do not connect to a sub-panel.
2. Use a dedicated branch circuit for the drive.
3. Route motor wiring out of the building as soon as possible. Separate input power and motor wiring by
at least 8 in. (20.3 cm).
4. Cross over other branch circuits and facility wiring at a 90
angle. If it is necessary to run wiring in par
-
allel, separate by at least 8 in. (20.3 cm).
5. All control wiring—sensors, switches, transducers, etc.—should be in a separate conduit routed individu
-
ally, not parallel, from high voltage wiring. In addition, any shielded cables should be properly grounded.
Branch Circuit Protection
Integral solid state short circuit protection does not provide branch circuit protection. Branch circuit protec-
tion must be provided in accordance with the National Electrical Code and any additional local codes, or the
equivalent. Drive shall be protected by fast-acting Class T fuses only.
Terminal Block Wire Size
Maximum Torque
Do not use power tools to tighten terminal block screws, use hand tools only. Tighten terminal block screws
to a maximum torque of:
AWG 20 to AWG 6 - 15 in-lbs (1.7 Nm)
AWG 20 to AWG 2 - 31 in-lbs (3.5 Nm)
AWG 16 to AWG 2/0 - 50 in-lbs (5.5 Nm)
Risk of damage to VFD
,
or malfunction can occur.
Follow all wire routing and grounding instructions carefully. Inductive currents caused by parallel wiring, or close
proximity between high voltage and control wiring can cause unexpected behaviors.
•
Do not run input power and motor wires in the same conduit.
•
Do not run motor wires from multiple VFDs in common conduit.
•
Do not run any wiring through the airflow channel in the back of the drive.
•
Do not run control wiring parallel with high voltage wiring.
•
Do not install a magnetic contactor or disconnect in the motor circuit.
•
Do not run VFD wiring parallel with house or out-building wiring.
•
Do not use aluminum wires for VFD connections.
•
Do not use with a Ground Fault Circuit Interrupter (GFCI).
•
All wiring must comply with the National Electrical Code and local codes.
•
Improper splicing or damage to motor cable insulation may expose the conductor(s) to moisture and can pro
-
duce motor cable failure.
•
For retrofit application, make sure to check the integrity of power and motor leads. This requires measuring the
insulation resistance with a suitable megohm-meter.
Frame Size
Input Terminal Block
SDC Plus All Models
Output Terminal Block
SDC Plus SUB Models
Output Terminal Block
SDC Plus CEN Models
Min AWG
Max AWG
Min AWG
Max AWG
Min AWG
Max AWG
Frame 2
20
6
20
2
20
6
Frame 3
20
2
16
2/0
20
2
