A residential wiring system typically uses a. flat conductor cable b. tray cable c. nonmetallic-sheathed cable d. medium-voltage cable

## Step1: Identify the common residential wiring system<br />### Residential wiring systems typically use a specific type of cable that is safe, easy to install, and cost-effective. Among the options provided, nonmetallic-sheathed cable (often referred to as NM cable or Romex) is the most commonly used in residential settings due to its flexibility and ease of installation.<br />#