I'm renting a house for the next 18 months, and am looking to buy a circular saw. I'm down to a 15 amp PC saw vs. a 13 amp Makita. I like the 15 amp PC a little more, and it is actually a little cheaper than the Makita, but I don't want to trip the breaker on my circuit when I use it heavily. I understand that at idling and easy cutting, saws won't draw close to max power, but when you increase the resistance and RPMs that you get closer to the 15 (or 13) amps. Is the 15 vs. 13 amps the maximum current that the saw will draw when fully loaded where if you were to increase the resistance, the saw wouldn't be able to cut further?
I'm just a DIY type, and so heavy cutting is cutting through a pressure treated post, or something along those lines. I've read several threads and they were all very informative, but none really answered my question. Several people mentioned that they used 15 amp tools in the field off standard 15 amp circuits with no problems, but that doesn't seem too scientific to me, although helpful. Most responders just recommended installing 20 amp circuits in the shop, and that isn't an option for me. I don't want to trip the breaker when using a 15 amp saw, but will get the 13 amp saw if that is what will happen. I suppose I could get the 15 amp saw and just not punish it to the point of drawing 15 amps (don't force it through tough wood, etc), but it'd be nice to not have to worry about it at all.
So basically two questions: 1) Is the 15 vs. 13 amps the maximum current that the saw will draw when fully loaded where if you were to increase the resistance, the saw wouldn't be able to cut further? 2) Will using the 15 amp saw trip the 15 amp breaker in my garage?