Rockwell Automation 1336T Wiring and Grounding Guide, (PWM) AC Drives - Manual (Page 12)

12 Rockwell Automation Publication DRIVES-IN001M-EN-P - March 2014
Chapter 1 Wire/Cable Types
Figure 1 - Wire Selection Flowchart
Temperature Rating
In general, follow these temperature ratings for installations:
• In surrounding air temperature of 50 °C (122 °F), use 90 °C (194 °F) wire
(required for UL)
• In surrounding air temperature of 40 °C (104 °F), use 75 °C (167 °F) wire
(required for UL)
Refer to the user manual of the drive for other restrictions.
XLPE PVC
20 mil or > (1)
230V 400/460V
15 mil
> 15.2 m (50 ft)
< 15.2 m (50 ft)
575V
Selecting Wire to Withstand Reflected Wave Voltage for New and Existing Wire Installations in
Conduit or Cable Trays
Conductor
Environment
Conductor
Insulation
Insulation
Thickness
DRY
(per NEC Article 100)
WET
(per NEC Article 100)
XLPE (XHHW-2)
Insulation for
< 600V AC
System
No RWR or
Terminator
Required
OK for < 600V AC
System
No RWR or
Terminator Required
Reflected Wave
Reducer?
RWR or
Terminator
No RWR or
Terminator
RWR or
Terminator
No RWR or
Terminator
Reflected Wave
Reducer?
Cable
Length
Number of
Drives in Same
Conduit or Wire
Tray
15 mil PVC
in Not
Recommended.
Use XLPE
or > 20 mil
15 mil PVC
is Not
Recommended.
Use XLPE
or > 20 mil
Multiple Drives
in Single Conduit
or Wire Tray
Single Drive,
Single Conduit or
Wire Tray
See NEC Guidelines (Article 310
Adjustment Factors) for Maximum
Conductor Derating and Maximum
Wires in Conduit or Tray (1) The minimum wire size for PVC cable with 20 mil or greater insulation is 10 gauge.
IMPORTANT The temperature rating of the wire affects the required gauge. Verify that your
installation meets all applicable national, state, and local codes.