Perhaps change the breaker to 10A?
if he is in usa home breaker box is 15 amp as a minimum for 120 volt power.
I think I have an item link for him
https://www.amazon.com/Simran-SM-60-Universal-110V-250V-Protection/dp/B003UHYDYOthis has a 10 amp fuse and will handle 110 to 250 volts
including usa plugs.
So if he is usa it will trip at
10 amps x 110 volts = 1100watts
10 amps x 115 volts = 1150watts
10 amps x 120 volts = 1200watts