The nylon is under hoop stress, causing friction with the stud. Unless
it softens due to temperature, it remains effective. However, if there
is any doubt, an all-metal version is available. Do a Web search for
'all-metal friction nuts'.
======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only
www.woodjohn.uk
Rayleigh, Essex UK
Istae nunc praetereunt nisi non ubicumque
On 2021-11-15 14:06, Chris Wordley wrote:
Hello
We sometimes come across products that employ a Nyloc nut as the sole
means of securing (preventing accidental loosening of) a protective
earth connection on a threaded stud.
I’ve heard various views on the acceptability of this type of
construction - some consider it OK provided the temperature is not
high enough to cause the nylon insert to soften, others think that a
separate spring/serrated washer is required since the nylon cannot be
depended on in the longer term.
I’d be interested to hear the views of others, particularly any CB or
similar labs. I failed to uncover any IECEE decisions on this subject.
Best Regards
Chris
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