Step 1
Determine whether the electric heater has field-installed electric heat or has single point power (contains electric heat). The formulas for the two variations are different.
Step 2
Multiply the full load amps of the indoor fan motor by 400 percent for a single-point power unit.
Step 3
Add the resulting number to the full amp loads of the heater. This will give you the MOCP for a unit with single-point power.
Step 4
Multiply the heater full amp loads by 150 percent and subtract the resulting number from 125. The end number will be the MOCP for a unit with field-installed electric heat.