Question

On circuits above _____, all exposed metal parts of portable control devices should be grounded by a grounding conductor in the control cable.

a) 50 amps
b) 50 volts
c) 50 watts
d) 50 ohms

Answer 1

Exposed metal parts of portable control devices must be grounded in control cables on circuits above 50 volts to ensure safety and prevent electric shock.

Step-by-step explanation:

For electrical safety, all exposed metal parts of portable control devices should be grounded by a grounding conductor in the control cable on circuits above 50 volts. This is an important safety feature to prevent electric shock in case a short circuit occurs and the appliance becomes energized. Grounding provides a low-resistance path for electric current to flow back to the ground rather than through a person touching the appliance.