Explain why a tag-only setup on a lockable device is weaker than lockout.
Compare the before and after. What makes the second setup real lockout instead of a warning? Before: a tag is present, but the lockable breaker can still be operated. After: the isolating device is physically held safe, and the tag identifies the lockout. Physical restraint was added. The lockout device now prevents movement; the tag alone only warned. The tag moved into the right role. It identifies the authorized employee and danger, but it is no longer the only barrier. The setup matches the hierarchy in 1910.147. When the device can accept a lock, lockout is the default unless equivalent…
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