Electrician's Licensing Practice Exam

What is considered an inadequate support for overhead services according to NEC?

1. Building structure

2. Tree branches

3. Electrical poles

4. Metal conduits

The correct answer is: Tree branches

Support for overhead services is crucial for ensuring safety and compliance with the National Electrical Code (NEC). In this context, tree branches are considered inadequate support for overhead services because they are not structurally reliable. Tree branches can sway, bend, or break under various weather conditions or due to the natural growth of the tree itself. This instability poses significant risks for electrical safety, including potential damage to the overhead lines or equipment and increased hazards such as electrical shock or fire. In contrast, building structures, electrical poles, and metal conduits are designed and constructed to provide stable support for overhead electrical services. They are engineered to withstand environmental factors without compromising safety. Recognizing the importance of using appropriate supporting structures helps prevent accidents and ensures that electrical installations adhere to NEC standards.