When is a fuel one-line diagram required at a generator site?

A fuel one-line diagram becomes necessary when there is an external fuel source connected to a generator. This diagram serves as a critical component of the overall electrical and management systems for power generation facilities. It visually represents how fuel is supplied to the generator, detailing the connections between the generator, the fuel tanks, and any associated pumps, valves, or controls.

In scenarios involving an external fuel source, this diagram ensures that there is a clear understanding of how fuel flows to the generator and aids in system diagnostics, maintenance, and troubleshooting. It also plays a significant role in safety and regulatory compliance, allowing operators and emergency responders to quickly assess fuel sources and manage any risks associated with fuel supply or storage.

In contrast, regular maintenance, the installation of a new generator, or inspections may not require this detailed schematic, as they focus on operational readiness, equipment functionality, or compliance checks without necessarily involving external fuel systems.