Always note inverter voltage. Select appropriate over current protection
devices, select disconnect device, and select proper wire size before begin-
ning the wiring process. Wire the drive according to NFPA 70 Class 1 re-
quirements.
The correct wire gauge for each size inverter can be selected from the charts
in Sections 2.4-2.5. The wire gauge is based on the maximum fuse rating for
the inverter. The terminal tightening torque can be found for each unit in the
same charts.
Always use UL-listed and CSA-approved wire. Use 60/75°C copper conductors
only for equipment rated 100 Amperes or less and use 75°C copper conductors
only for equipment rated greater than 100 Amperes! Use minimum 300V rated
wire with 230V systems and minimum 600V rated wire with 480V systems.
To prevent coupling high-frequency noise, the following wires must be spatially
separated from each other at a minimum distance of 8 inches (20 cm) when
they are laid parallel to each other.
• AC supply power and motor lines not connected to inverters
• Motor lines connected to inverters
• Control and data lines (low-voltage level < 48 V)
When using EMI lters, use only the wire provided with the lter to connect
the lter to the inverter. Do not add additional wire between the lter and the
inverter as this will have a negative effect on the operation of the lter.
2.2.8 High Voltage
Connections
Electrical Connection
16
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