Final answer:
The correct option is c. pulling on the cord to remove a plug from an outlet. The unsafe measure when using electrical equipment is pulling on the cord to unplug a device, which could lead to wire exposure and risk of shock or thermal hazards.
Step-by-step explanation:
The measure that is unsafe when using electrical equipment is c. pulling on the cord to remove a plug from an outlet. For electrical safety, it's important to always follow the manufacturer's instructions, keep electrical items away from water and spills, and to turn off the electrical item when not in use or before unplugging. Pulling on the cord instead of the plug can damage the cord and potentially expose wires, creating a risk for shock and thermal hazards. Electrical safety protocols are designed to prevent such hazards, which could result in electrical fires from overheated wires or electric shocks that can range from painful to fatal.
Thermal and Shock Hazards
Electrical hazards include thermal and shock hazards. A thermal hazard occurs when an appliance or wiring overheats, which can lead to fires. This is why electrical equipment should not be overloaded. Shock hazards from electricity can result in serious injury or even death, especially if the electric current passes through the heart. Safety devices like fuses and circuit breakers are used to interrupt excessive current and prevent these hazards.