I recently added an Intermatic T101 mechanical timer, and now about once a week the 20A fuse that is in the circuit blows out. Before adding the timer I never blew a fuse. I tested with an ammeter, with the pump on it draws 10.6A pre-timer and 10.4A on the pump side of the timer. I have a Hayward 1HP PowerFlo II pump.
currently the electrical is set up like
house box > fuse/switch box in garage > GFCI outlet > timer > pump
The timer is hard wired in with 10ga wire connected to the load side of the GFCI outlet.
I'm totally stumped as to why this is happening since I have tested all of the connections and everything is set up correctly. Any ideas? Should I move the timer to be before the fuse box and GFCI?