How much should the conduit end extend from any connection except at the fuel tank for encased copper oil lines?

The correct answer is that the conduit end should extend 2 inches from any connection, except at the fuel tank, for encased copper oil lines. This requirement is established to ensure adequate protection for the oil lines, preventing any potential damage or wear that might occur at the connections. By having a specific extension length, it allows for the necessary space to safely manage connections, while also maintaining a degree of flexibility in the line itself.

The 2-inch extension serves as a standard that provides enough length to facilitate secure sealing and insulation of the lines, reducing the risk of leaks or failures at junction points. Furthermore, maintaining a consistent standard helps ensure safety and compliance with local regulations governing oil fuel systems.

Deciding on a longer or shorter extension could compromise the integrity and safety of the installation, leading to increased risks of leaks or inadequate protection against environmental and operational factors. Thus, adhering to this specified 2-inch extension helps to uphold safety standards within the industry.