How would the power requirements be affected with any change?
This is the right question to ask and need to fully explore and have locked down prior to making any purchase of a new unit. While more then likely the power you have for either the existing m/w or refer will be sufficient for the larger refer, but you have to do your homework on this else risk a fire. I am assuming each is on its own circuit but if only one ckt powering both, the below logic still applies.
But its easy enough: Start by determining your breaker or fuse size for each of your existing units (Amps and Voltage). Compare those numbers with the specs of the unit you are considering to be sure you are well within the amps (its assumed will be the same voltage). If yes, then you are good to use that existing circuit. I define ‘well within’ as 80%. Example is the existing circuit is 15 Amps at 110VAC then 80% of 15A = 12 Amps is the max I would put on that circuit (12.5A would be ok too). This is just good practice, adds a safety margin, and accounts for startup surges for things like motors.
If you are searching for a new unit and the data lists Watts (power) then simply take your 15A x 110V = 1,650 Watts (Power = Volts x Amps). 80% of 1650W = 1,320W for that margin.
If the new unit you are considering is at, or exceeds, your current arrangement, then it is a whole different story and one that needs much more evaluation and planning. But it can be done. DO NOT attempt to add say two 15A circuits to get 30A! it does not work that way…
If want to continue the electrical discussion it may be best to move over to the Electrical Forum. Also, if you want to PM me, I will help as I can.
Good luck!
