The maximum demand current can be determined using one of four methods: calculation, assessment, measurement, or limitation. The calculation method is commonly used during the design process and is the method employed by this calculator.
This calculator references Table C2 from the AS/NZS3000 wiring rules standard. Table C2 specifies how electrical load is distributed among different types of equipment connected to consumer mains or submains in non-residential settings.
To find the maximum demand current, the calculator first determines the current for each equipment load group within the affected section of the installation. These individual currents are then summed up to obtain the total maximum demand current for the consumer mains or submains.
Maximum Demand = Sum of current values for all equipment load groups
Note that the calculated maximum demand pertains only to consumer mains and submains. The actual maximum demand may vary depending on other factors like equipment efficiency, diversity, and the actual operating conditions.