"Maximum Rating or Setting for Motor Branch Circuits"

 


Motor Branch - Circuit Protective Devices
Maximum Rating or Setting

Percent of Full-load current

Type of Motor Nontime
Delay Fuse**
Dual Element
(Time Delay)
Fuse**
Instantaneous
Trip Breaker
Inverse Time
Breaker
Single Phase
AC polyphase other
than wound rotor
Squirrel Cage
300 175 800 250
Other than Design E 300 175 800 250
Design E 300 175 1100 250
Synchronous 300 175 800 250
Wound Rotor 150 150 800 150
Direct-Current
(constant voltage)
150 150 250 150

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