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(Conforming standard UL 508C, CSA C22.2 No.14)
(1) Installation
This inverter is UL-listed as a product for use in an enclosure.
Design an enclosure so that the inverter surrounding air temperature, humidity and atmosphere satisfy the
specifications. (Refer to page 184.)
Wiring protection
For installation in the United States, branch circuit protection must be provided in accordance with the National
Electrical Code and any applicable provincial codes.
For installation in Canada, branch circuit protection must be provided in accordance with the Canadian Electrical Code
and any applicable provincial codes.
Provide the appropriate UL and cUL listed Class RK5 or Class T type fuse or UL489 molded case circuit breaker
(MCCB) that is suitable for branch circuit protection in accordance with the table below.
* Maximum allowable rating by US National Electrical Code.
Exact size must be chosen for each installation.
(2) Wiring of the power supply and motor
For wiring the input (R/L1, S/L2, T/L3) and output (U, V, W) terminals of the inverter, use the UL Listed copper, stranded
wires (rated at 75°C) and round crimping terminals. Crimp the crimping terminals with the crimping tool recommended
by the terminal maker.
(3) Wiring of control circuit
Use a 16-18AWG cupper cable and perform wiring without using crimping terminals.
(4) Short circuit ratings
• 200V class
Suitable For Use in A Circuit Capable Of Delivering Not More Than 100kA rms Symmetrical Amperes, 264V Maximum.
• 400V class
Suitable For Use in A Circuit Capable Of Delivering Not More Than 100kA rms Symmetrical Amperes, 528V Maximum.
Appendix 3 Instructions for UL and cUL Compliance
FR-A721-K 5.5 7.5 11 15 18.5 22 30 37 45 55
Rated fuse voltage(V) 240V or more
Fuse maximum allowable rating (A)*
70 125 150 200 200 250 300 350 400 500
Molded case circuit breaker (MCCB)
m
aximum allowable rating (A)*
60 80 110 150 175 225 250 350 400 500
FR-A741-K 5.5 7.5 11 15 18.5 22 30 37 45 55
Rated fuse voltage(V) 480V or more
Fuse maximum allowable rating (A)*
35 60 70 90 100 125 150 175 200 250
Control
circuit
terminal