James,
     That is correct. If you want or need that info it is in the=20
datasheet. When you go to the store to buy one there are two things=20
available on the box. They are the style and the trip current rating.
Thanks,
rich!

On 2/16/2015 9:58 PM, James Cameron wrote:
> I'll take that as meaning the rated holding current is not printed,
> and that the breakers may well be designed for the rated holding
> current, and then labelled for the trip current.
>
> Thanks.  That's interesting.  You have a truly unique system that I'd
> never heard of.  That 80% rule is really strange.
>
> In Australia, the breakers are labelled and specified for the rated
> holding current.
>
> This labelling follows the international and European standards,
> e.g. IEC/EN EN 60898-1 ... with a single letter prefix for specifying
> the instantaneous tripping current as a _multiplier_ of current, not
> as a _percentage_ as you do.
>
> The 20 stamped on your breakers would be a C16 stamped on our
> breakers, which means a rated holding current of 16 A, and an
> instantaneous trip current above 80 A and up to 160 A.
>
> Instantaneous meaning less than 100 ms (five cycles at 50 Hz).
>
> Special loads are given different instantaneous trips.
>
> Your "nothing else matters to us" is carefully noted.  This is a
> difference between engineering and electrical code contracting.  ;-)
> Procedures that reduce risk by reducing thought, and therefore
> possibilities for error.
>
> Thanks to Eoin for the links.  The products there don't have any 80%
> rule; the Eaton products use the C and D tripping curves.  They list
> IEC/EN 60947-2, and also UL.
>
> On Mon, Feb 16, 2015 at 09:02:49PM -0600, Richard R. Pope wrote:
>> James,
>>       The breakers sold and used in the US are rated at 80% continuous
>> current of what is stamped on the handle. This is required by UL labs
>> and the NEC. So if the handle has a 20 stamped on it the instantaneous
>> trip current is 20 amps and the maximum continuous holding current is 16
>> amps. This is the law here. You can download the datasheet for whatever
>> model that you want more info on. To us installers all we care about is
>> what is the number on the handle, is it an arc-fault breaker, (this was
>> required as of 2013 in the US), and is it UL listed. Nothing else
>> matters to us. I have never done any additional research beyond that.
>> Thanks,
>> rich!
>>
>> On 2/16/2015 8:01 PM, James Cameron wrote:
>>> Is the rated holding current printed anywhere on the breaker?
>>>

--=20
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