What is the standard procedure for connecting to a Siamese connection (FDC)?

The standard procedure for connecting to a Siamese connection, also known as a Fire Department Connection (FDC), is to hook up the left side first. This practice is generally recommended for consistency and to ensure proper water flow from the source. By connecting one side before the other, it allows firefighters to monitor the flow and pressure more effectively and address any potential issues before connecting the second line.

This method is particularly useful when dealing with two separate connections, as it helps to prevent any confusion or operational issues that can arise from simultaneous connections. Deliberately following this order also aids in maintaining a systematic approach to firefighting operations, enhancing efficiency and safety during a critical response.

The other options may involve different techniques, but they do not adhere to the established protocol for connecting to Siamese connections and could lead to complications in an emergency scenario.