USCG Exam PracticeMotor controllers and remote control
According to 46 CFR §111.70-7, the control circuit potential for a motor controller must normally be derived from which point in the circuit?
- A. The line side of the motor and controller disconnect device
- B. A separate dedicated control power transformer independent of the main bus
- ✓ The load side of the motor and controller disconnect deviceCorrect
- D. Any convenient source within the same switchboard section
Why C is correct
46 CFR §111.70-7(c) requires that the potential for a control, interlock, or indicator circuit be derived from the load side of the motor and controller disconnect device. Derivation from the line side is only permitted under specific alternative switching arrangements detailed in paragraph (d).
Cited:46 CFR §111.70-7