Clause 0 is special, It's the Introduction, which is not normally
divided into sub-clauses:
The objective of the INTRODUCTION is to help designers to understand the
underlying
principles of safety in order to design safe equipment. These principles
are informative and
not an alternative to the detailed requirements of this standard.
The only t-p screw in your list is 'security Torx', which has a pin in
the middle of the recess. There are many more types, such as what looks
like a Philips but has only 3 'wings'. Driver kits are freely
available, so the measure of security is doubtful.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2019-04-06 21:27, Robert Johnson wrote:
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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