Table 430.52 Maximum Rating or Setting of Motor Branch-Circuit Short-Circuit and Ground-Fault Protective Devices

Type of Motor	Percentage of Full-Load Current
	Nontime Delay Fuse 1	Dual Element (Time-Delay) Fuse 1	Instantaneous Trip Breaker	Inverse Time Breaker 2
Single-phase motors	300	175	800	250
AC polyphase motors other than wound-rotor	300	175	800	250
Squirrel cage — other than Design B energy-efficient	300	175	800	250
Design B energy-efficient	300	175	1100	250
Synchronous 3	300	175	800	250
Wound-rotor	150	150	800	150
DC (constant voltage)	150	150	250	150