Surge protectors are most commonly used in which setting?

Surge protectors are commonly used in residential and commercial electrical systems because these environments are vulnerable to voltage spikes that can occur due to various reasons, such as lightning strikes or sudden changes in electricity demand. The primary function of a surge protector is to protect sensitive electronic devices and appliances from damage that can be caused by these voltage surges. In homes and businesses, where numerous devices are connected to the electrical system, surge protectors serve as a crucial line of defense.

In residential settings, people often rely on surge protectors for televisions, computers, and home entertainment systems, which are all susceptible to damage from power surges. In commercial environments, where more sensitive and expensive equipment is utilized, surge protectors help safeguard financial investments and maintain operational continuity.

While surge protectors can be used in outdoor installations, their primary application extends beyond that specific scenario to include a wide range of electrical systems found in both residential and commercial properties. They are not exclusively used in industrial settings or high-voltage power lines, which generally have different protective measures and do not rely solely on surge protectors. Therefore, their broad application across residential and commercial systems makes this the correct answer.