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.
Multiply the full load amps of the indoor fan motor by 400 percent for a single-point power unit.
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.
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.
Things You Will Need
- Instruction manual
- If you do not know whether your electrical unit is a single-point power unit or a unit with field-installed electric heat, consult the instructions manual or call the manufacturer.