CWEA Maintenance Technologist Practice Test

Overloading of an electrical circuit may be caused by which of the following?

1. Using a higher voltage supply

2. Using lower gauge wire

3. Connecting loads that draw too much current

4. Connecting devices with built-in fuses

The correct answer is: Connecting loads that draw too much current

Overloading of an electrical circuit occurs when the total current flowing through the circuit exceeds the designed capacity of the wiring or components. This situation can happen when multiple devices are connected to the circuit, each drawing power. When connecting loads that draw too much current, it creates demand that goes beyond what the circuit can handle. This can lead to excessive heat buildup in the wires, potentially causing insulation to melt, short circuits, or even electrical fires. This understanding of current demand versus circuit capacity is crucial in ensuring safety and longevity of electrical systems. Regarding the other options, using a higher voltage supply typically leads to a risk of damaging devices rather than overloading due to excess current, while using lower gauge wire refers to wire thickness that can handle higher currents, and thus does not, by itself, lead to overloading. Connecting devices with built-in fuses generally adds a protective measure against overload rather than contributing to it.