These are terms to describe amperage values for a heater. FLA stands for “Full-Load Amps”, the maximum nominal current of a heater. MCA stands for “Minimum Circuit Ampacity”, a calculated value with a safety factor that specifies the minimum main power supply and wires. MOP/MOCP stands for “Maximum Overcurrent Protection”, the highest current rating that an electrical equipment’s over-current protection devices (such fuses or circuit breakers) are permitted to handle. Note: MOP/MOCP values are not given by Thermolec. These values are to be determined by the installing electrician as per local Electrical Codes.