USCG Exam PracticeMotor controllers and remote control
Which information is NOT required to be marked externally on a motor controller or motor-control center under 46 CFR §111.70-3?
- A. Manufacturer's name or identification
- B. Number of phases
- ✓ Insulation class of the motor windingsCorrect
- D. Current rating of trip setting
Why C is correct
46 CFR §111.70-3(d)(1) lists the required external markings: manufacturer's name, voltage, number of phases, current, kW/horsepower, identification of motor being controlled, and current rating of trip setting. Insulation class of the motor windings is not among them.
Cited:46 CFR §111.70-3