Journeyman Electrician Practice Exam

The maximum temperature that combustible materials can be subjected to when using lampholders is crucial for ensuring safety in electrical installations. This is primarily to prevent fires and other hazards stemming from overheating. A measurement of 194ºF is significant because it is below the ignition point for many common combustible materials, making it a safe threshold.

At 194ºF, the guideline ensures that any heat generated by the lampholder does not cause any materials nearby, such as wood or paper, to ignite. This standard is aligned with safety regulations and best practices in electrical work, emphasizing the importance of heat management in electrical fixtures.

In contrast, other temperatures listed would allow for a higher risk of ignition under certain conditions. Thus, 194ºF serves as the safest and most effective choice for preventing fire hazards in conjunction with lampholders.