USCG Exam PracticeMotor controllers and remote control
Under 46 CFR §111.70-7, from which point must the potential for a control, interlock, or indicator circuit normally be derived?
- A. The line side of the motor and controller disconnect device
- ✓ The load side of the motor and controller disconnect deviceCorrect
- C. An independent transformer dedicated to control circuits
- D. The ship's emergency switchboard
Why B 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 conditions described in §111.70-7(d) when control functions make the load-side arrangement impracticable.
Cited:46 CFR §111.70-7