a true 1.75 hp motor can draw close to 15 amps depending on efficiency and other factors of the motor. the motor plate will tell you the rated current. at start up, a motor is in a high current draw condition until speed is reached. this will likely trip an Over Load Protection device not rated for motors (time delay).
your power strip may not be rated accordingly. my guess is that the OLP device was close but did not trip before. now that the saw has aged (bearing wear, dirt, friction, etc.), the start up current is a little higher tripping the breaker. it should probably be on a 20 circuit anyway - check motor label.
Last edited by TimPa; 09-08-2015 at 01:43 PM.