NEC Commercial Electrical Practice Test

How many inches of free conductor must be left at each outlet for the connection of fixtures or devices?

1. 4 inches

2. 6 inches

3. 8 inches

4. 10 inches

The correct answer is: 6 inches

The requirement to leave a certain length of free conductor at each outlet is essential for ensuring that there is enough wire available for making connections to fixtures or devices. According to the National Electrical Code (NEC), the standard amount of free conductor that must be left at each outlet is 6 inches. This length provides sufficient wire for securing connections without risk of pulling or straining the wire. Having 6 inches of free conductor allows electricians and installers to make the necessary wire connections safely and efficiently, accommodating various types of fixtures and devices that may be attached at a later point. This practice also helps in meeting safety standards and ensuring that the wiring is accessible for troubleshooting and maintenance. By adhering to this requirement, installers can ensure that the circuits remain reliable and that connections are not strained, promoting longer life and enhanced safety of the electrical system. Other lengths, such as 4, 8, or 10 inches, do not align with the NEC's guidelines for providing adequate free conductor at outlets.