BS EN 60309-1 covers, I think, interlocked switches. Is there a difference between isolation and switching off for mechanical maintenance?
I found the above confusing, so there must be something I missed…
Answer: The table does not give an indication for switching off for mechanical maintenance, which is a different concept to isolation. Isolation is the removal of electrical energy to reduce a shock risk when switching for mechanical maintenance, as it states, and live conductors may still be present.
A plug and socket outlet would normally achieve both functions.