I notice that IEC 62368 mentions tamper-proof screws in a couple places
(articles 0.8, 0.11), although not explicitly requiring them. It
describes tamper-proof screws as providing a supplemental safeguard
against hazards. I would take that to mean for level 3 hazards, for
example mains terminals, basic protection or other measures would ALSO
be needed such as covers using regular screws. What are the implications
for mains plugs assembled with slotted screws?
I have always assumed that requiring the use of a tool would provide
protection against access to level 3 hazards. Access to mains terminal
requirements seems to only require a tool per clause G.7.6.1. and V.1.1
The standard uses the term “tamper-proof screw” without definition. Is
it slotted, Phillips, Torx, security Torx, Allen, hex, Robertson, or
others <https://en.wikipedia.org/wiki/List_of_screw_drives> ?
Are there examples where ordinary fasteners must be replaced with
tamper-proof ones?
Bob Johnson
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