The maximum length of a flexible cord supplying a 240-volt room air conditioner shall not exceed ___?

The maximum length of a flexible cord supplying a 240-volt room air conditioner is specified to not exceed 6 feet to ensure safety and compliance with electrical codes. This limitation is in place primarily for several reasons.

First, shorter cord lengths help to reduce resistance, which minimizes the risk of overheating and potential fire hazards that could arise from longer cords. A shorter cord is less likely to encounter issues related to voltage drop, ensuring the air conditioner operates efficiently and safely at the appropriate voltage.

Second, a maximum length of 6 feet helps to promote proper installation practices. It ensures that the flexible cord is used in a manner that minimizes wear and damage. Longer cords can be subject to mechanical stress, especially if moved frequently, leading to insulation damage or failure.

Finally, this restriction aligns with residential and commercial standards set forth by the National Electrical Code (NEC) and other electrical safety regulations. Compliance with these guidelines is crucial for both the safety of the installation and the protection of the equipment itself.

Using a cord longer than 6 feet could pose significant risks and is therefore not advised.