Motor branch-circuit short-circuit and ground-fault protection and motor overload protection shall be permitted to be combined in a single protective device when the device rating or setting provides the overload protection specified in 430.32.

Motor branch-circuit short-circuit and ground-fault protection and motor overload protection shall be permitted to be combined in a single protective device when the device rating or setting provides the overload protection specified in 430.32.

• A. True
• B. False
• C. Only for hermetic motor-compressors
• D. Only in supervised locations

Answer: (A)

The idea being tested is that motor protection for overload can be combined with short-circuit/ground-fault protection in one device, as long as that device is rated or set to provide the overload protection required by 430.32. When the protective device has the correct rating or adjustable setting to meet the motor’s overload protection requirements, you can use a single device to handle both functions. This simplifies the protection scheme without compromising safety or motor protection. This isn't limited to any specific type of motor (such as hermetic compressors) or to supervised locations, so those qualifiers aren’t necessary. If a single device isn’t capable of delivering the required overload protection per 430.32, then separate protections would be necessary.

The idea being tested is that motor protection for overload can be combined with short-circuit/ground-fault protection in one device, as long as that device is rated or set to provide the overload protection required by 430.32. When the protective device has the correct rating or adjustable setting to meet the motor’s overload protection requirements, you can use a single device to handle both functions. This simplifies the protection scheme without compromising safety or motor protection.

This isn't limited to any specific type of motor (such as hermetic compressors) or to supervised locations, so those qualifiers aren’t necessary. If a single device isn’t capable of delivering the required overload protection per 430.32, then separate protections would be necessary.