Rockwell Automation Publication 750-IN100B-EN-P - July 2017 113
Power Wiring Chapter 5
Fuses and Circuit Breakers
The tables on the following pages provide recommended AC line input fuse
and circuit breaker information. Sizes listed are the recommended sizes based
on 40 °C (104 °F) and the U.S. NEC. Other country, state, or local codes can
require different ratings. In addition, Drives and bus supplies include AC line
and DC bus fuses (with blown fuse indicators) to provide short circuit
protection.
Fusing
The recommended fuse types are listed here. If available current ratings do not
match the ratings that are listed in the tables provided, choose the next higher
fuse rating.
• IEC - Use type gG or equivalent conforming to EN60269-1, Parts 1 and
2.
• UL – Use Class T, RK1, J, or L conforming to UL 248.
Circuit Breakers
The “non-fuse” listings in the following tables include inverse time circuit
breakers and instantaneous trip circuit breakers (motor circuit protectors).
Both types of circuit breakers are acceptable for IEC installations.
IMPORTANT Rockwell Automation requires the use of fuses and circuit breakers. Circuit
breakers are use only as means for disconnection. Fuses provide branch
circuit protection.
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