Which of the following is not a reason to install electrical ground?

The installation of an electrical ground serves several critical functions, primarily focused on safety and system integrity. A secure connection is not typically a reason for grounding. Grounding does not inherently "secure" connections in the way that ensuring mechanical or electrical connections do; rather, it is about stabilizing voltage levels and creating a safe path for excess electricity.

Grounding does help with aspects such as protecting against induction, accidental re-energization, and proving isolation. Protection from induction is important to prevent unintended voltage buildup, while protection from accidental re-energization ensures that equipment remains de-energized during maintenance or repair. Lastly, proving isolation involves verifying that a system is not carrying current, which is essential for safe work practices.

Thus, while having a secure connection is important for overall electrical system performance, it does not pertain to the reasons for installing an electrical ground.