RussellMc wrote:
>> I am thinking maybe 60 deg C........?
>
> Informal answer only:
> I'd feel that 60C was too hot.
> 55C is what most people can just bear to immerse their hand in and
> hold it there.

There is probably a UL standard for that.  My off the cuff knee jerk
reaction is that I wouldn't want something to be hotter than 120F (49C)
where a user can touch it by accident, and 100F (38C) if it's meant to be
held.  Unless of course, as Russell said, the device is intended to be hot,
then higher temperatures might be acceptable.

If you've got a purely electronic device that is a unintentional heater,
then even 100F could be a marketing problem.  How would you feel about a
hand held scanner, for example, if it routinely got up to your body
temperature?  It's not dangerous or uncomfortable, but you may think
something is wrong or that the product is shoddy.


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