Disconnects through which current does not normally flow usually remain _________.

Disconnects through which current does not normally flow usually remain _________.

• A. Open
• B. Closed
• C. Interlocked
• D. Locked

Answer: (A)

When a disconnect isn’t carrying any normal current, it should be left open to ensure a definite, verifiable isolation. This open state provides a clear break in the circuit, making it obvious that the equipment is de-energized and cannot be re-energized accidentally during maintenance or testing. Keeping the disconnect open supports safe lockout/tagout practices by preventing any unintended energization. The other terms describe mechanical features or conditions (being interlocked or locked) rather than the required electrical state for a non‑energized path, so they don’t convey the same safety-controlled default as an open disconnect.

When a disconnect isn’t carrying any normal current, it should be left open to ensure a definite, verifiable isolation. This open state provides a clear break in the circuit, making it obvious that the equipment is de-energized and cannot be re-energized accidentally during maintenance or testing. Keeping the disconnect open supports safe lockout/tagout practices by preventing any unintended energization. The other terms describe mechanical features or conditions (being interlocked or locked) rather than the required electrical state for a non‑energized path, so they don’t convey the same safety-controlled default as an open disconnect.