The life of the contacts in the relay that controls this motor may be shortened by going to a higher power motor.I want to upgrade the blower in my Carrier unit from 1/3HP to 1/2HP or above. Is there a limit on the HP without making major electrical upgrades ?
The motor that is in it right now is :
The 1/2 hp motor will draw ~6.1x(0.5/0.3)= 10A so the wires that were carrying 6A will now have a temp. rise above ambient 3x higher than before so the life of the wire insulation may be shortened.
You may not notice either of these effects.