What is the maximum acceptable length of flexible metal conduit as an equipment grounding conductor without requiring a bonding jumper?

The maximum acceptable length of flexible metal conduit (FMC) used as an equipment grounding conductor without necessitating a bonding jumper is 6 feet. This standard is established to ensure that the electrical continuity is maintained effectively while providing a safe grounding path.

When the length of the flexible metal conduit exceeds 6 feet, additional measures, such as the installation of a bonding jumper, are required to guarantee adequate grounding. This is important in preventing potential hazards and ensuring proper electrical functioning. Adhering to this standard helps mitigate the risk of electrical shock or equipment failure. Understanding these requirements highlights the significance of grounding in electrical installations and compliance with safety codes.