AVO Electrical Safety Utility Practice Test

The concern with portable extension cords primarily revolves around the potential for internal damage that may not be visible from the outside. Even if the exterior of the cord appears to be in good condition, internal wires can become frayed or damaged from bending, pinching, or exposure to environmental factors over time. This internal damage can lead to significant safety hazards, such as electrical shorts or fire risks, since the damaged wires may no longer function properly.

Attention to the internal condition of extension cords is crucial because users often assess the safety of electrical equipment based on visible signs only. Without regular inspections or awareness of how extension cords should be used and maintained, problematic issues might go unnoticed, which can pose serious risks when the cords are plugged in and in use.

Other options, while they also represent possible risks associated with extension cords, do not capture the unseen dangers posed by internal damage. For instance, overheating due to voltage drop typically relates to an excessive load or too long of a wire run, while fraying is a visible sign of wear and tear, and corrosion from moisture can usually be seen during visual inspections. However, the kind of internal damage that is not externally visible requires more attention and awareness, making it a significant risk in terms of electrical safety.