Which component is only allowed to be disabled by the Electrical Utility Company?

The service drop is the component that is only allowed to be disabled by the Electrical Utility Company because it refers to the overhead or underground power lines that deliver electricity from the utility's distribution network to the customer’s property. This part of the electrical infrastructure is under the jurisdiction and control of the utility provider.

Utility companies have specific regulations and standards that govern service drops to ensure safety and reliability in the delivery of power. For example, any maintenance, disconnection, or adjustments needed for a service drop typically require trained utility personnel due to the high-voltage electricity involved and the critical role it plays in the electrical supply.

In contrast, the main panel board, cable trays, and circuit breakers are generally within the control and maintenance responsibilities of the property owner or electrician. While these components are essential for the operation of an electrical system within a building, they do not represent the direct delivery mechanism of power from the utility company.