Page 2 & 5 of this PDF has a pretty good graph for explanation...
http://www.automationdirect.com/static/specs/wmztminicircuitbreakers.pdf

Protection sizing for transformers
http://support.automationdirect.com/docs/an-misch-008.pdf

UL standards and where applicable (First couple of pages)
http://www.automationdirect.com/static/catalog/images/product-pdf/CP-Circui=
t-Protection.pdf

Eoin

On 16/02/2015 9:01 p.m., James Cameron wrote:
> Is the rated holding current printed anywhere on the breaker?
>
> As previously quoted by Allen, "A CB is designed and evaluated to
> carry 100% of its rated current for an indefinite period of time under
> standard test conditions."
>
> So what is the technical difference between a rated holding current
> and a rated trip current?
>
> On Mon, Feb 16, 2015 at 06:45:04PM -0600, Richard R. Pope wrote:
>> James,
>>       Two things are important for installers. The amp rating that is
>> printed on the handle.. Then there will be a label on the side and the
>> installer needs to make sure that it is UL certified. Whatever is on the
>> handle is the rated trip current. No other information is required by
>> the installer.
>> Thanks,
>> rich!
>>

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