Playing devil's advocate.An exposed live part, such as with a missing DB blank, is an immediate danger.
It's not immediately dangerous if someone doesn't stick their fingers in. "Most" people wouldn't think of sticking their fingers in.
An ES lamp in a holder without a big shroud will have an exposed live shell - waiting to zap people who would not expect it to be live. So why isn't that immediately dangerous - it doesn't need a fault to be live. And it will still be live when switched off at the wall if it's a single pole switch.
In theory - but look at how many "discussions" we have here about coding !.C1, C2, C3 does not represent levels of how bad you think something is, they are codes with clearly defined meanings.
AND everything in the whole installation connected to neutral. Like ES lamp caps, and the pins in BC lampholders. Even when a reasonable user might expect things to be off because "switched off".Yes everything connected to the neutral bar at the DB will be at line voltage, but it will all be behind covers which needs to be deliberately removed before being touched.
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