Master Electrician Practice Exam

What is the maximum length allowed for a power-supply cord to a mobile home?

1. 30 feet

2. 36 1/2 feet

3. 40 feet

4. 50 feet

The correct answer is: 36 1/2 feet

The maximum length allowed for a power-supply cord to a mobile home is established to ensure safety and efficiency in electrical installations. The National Electrical Code (NEC) provides specific guidelines on the length of power-supply cords to prevent voltage drop and overheating, which can lead to electrical hazards. In the case of mobile homes, the maximum permitted length of the power-supply cord is indeed 36 1/2 feet. This length is specified to ensure that the electrical supply remains stable and that the wire can safely carry the required load without exceeding temperature limits. Keeping the cord within this length helps to minimize resistance and maintain efficiency, allowing for the safe operation of electrical appliances and systems within the mobile home. Understanding these specifications is crucial for ensuring compliance with electrical codes and for promoting safety in residential wiring practices. Knowing the exact length requirements allows electricians to plan installations correctly and avoids potential issues with electrical performance or safety.