What are potheads used for in electrical systems?

Potheads are specifically designed as termination devices that connect underground cables to overhead power lines in electrical systems. They provide a safe and reliable transition point that protects the electrical connection from environmental contaminants and mechanical stress, such as wind or ice loading that can affect overhead lines. The design of potheads allows for proper sealing, which is essential for maintaining insulation and preventing moisture ingress, thus contributing to the safety and reliability of the entire electrical system.

The other options do not accurately describe the primary function of potheads. For instance, extending the length of overhead lines pertains more to the use of pole extensions or additional hardware designed for that purpose. Similarly, while diverting power to auxiliary circuits is a function of various switchgear components, it is not what potheads are intended for. Monitoring electrical load on a system is typically accomplished with metering equipment, not with potheads. Hence, the specific role of potheads is particularly crucial in ensuring the effective transition between underground cable systems and overhead distribution lines.