What is the primary purpose of grounding all electrical equipment used in the hospital setting?

a. To prevent the dangerous buildup of voltage in the equipment
b. To make the equipment more secure and less likely to break down
c. To avoid excessive energy costs
d. To convert electrical power from DC to AC

ANS: A
In these cases, the third (ground) wire prevents the dangerous buildup of voltage that can occur on the metal frames of some electrical equipment.