phase converter

O.K. after obsesing about what bridge saw I am going to buy, I finally made up my mind. I will be calling Park in the next day or two. This brings me to my next obsticle.... the phase connverter. We have 3 phase available on the pole out side of the shop but I heard it is costly to run it into the building. Since we may be moving to a bigger shop in a couple of years I decided to go with a phase converter for the new saw. Question is what size do I need to run the seirra and (http://maplered.com) can one converter run two machines (e.g. Line edge machine and (http://maplered.com) bridge saw) or do I need two.

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Jim Marshall, SFA
The Beveled Edge Marble & Granite
Westminster, Maryland (http://maplered.com)