Which of the following is not a requirement for a service entrance?

Fusetrons are not a requirement for a service entrance because they are a specific type of overcurrent protection device that combines fuses and circuit breakers. While overcurrent protection is indeed a requirement for a service entrance, various devices can fulfill that requirement, such as circuit breakers or fuses. Therefore, while a service entrance must include overcurrent protection, it does not specifically mandate the use of Fusetrons.

In contrast, a disconnect switch is essential to ensure that power can be safely turned off for maintenance or emergencies. Proper grounding is a fundamental safety requirement to prevent electrical shock and equipment damage. Overcurrent protection is necessary to safeguard the electrical system from excessive current that may cause overheating and fires. The question identifies Fusetrons specifically as not being a mandatory component, distinguishing them from other required elements of a service entrance.