Hi All,

200 Amp single phase service is fairly common in the US (my
present and last house has this service) so I know at least
that much is possible.

Separately, I posted sources for a couple of 180 degree
combiners useful for differential probes at www.dsmith.org
as this month's article. Last month's article was on
measuring high frequency performance of small inductors and
is archived under the Technical Tidbits section.

Doug

Doug wrote:
> 
> Peter Merguerian wrote:
> >
> > Dear All,
> >
> > I was asked the ampere limitation for single-phase in the US and Canada?
> > Can single-phase in the US and Canada handle 100-200 Amperes?
> 
> Yes.  Not sure if the question is really asking about
> the max. residential service amperage.
> 
> So, for the size of the largest service entrance conductor
> and associated size of grounding conductor, see ...
> 
>  http://www.cmapc.com/Elect%20Files/EHtmFiles/GECTable250-94.htm
> 
> For the associated ampacities of those conductors, see ...
> 
>  http://www.cmapc.com/Elect%20Files/EHtmFiles/Table310-16.htm
> 
> The table maxes out at 705 amps.
> 
> To calculate the size of the service needed,
> go to the following webpage, select the cell
> "Sizing of Electrical Service", download the
> Excel spreadsheet, and enter the necessary
> info in the yellow squares.
> 
>  http://www.cmapc.com/_private/electsfr.htm
> 
> Regards, Doug McKean
> 
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