Maximum demand calculator

The tool applies the demand rule for each load group you add. It lists the demand in amperes for each group, then reports the total demand and the demand per phase. Each line shows the table and the column that produced it.

It uses AS/NZS 3000:2018 Table C1 for one domestic installation or a block of living units. It uses Table C2 for other installations, with a residential or a commercial column. Choose the table and the mode first, because they change which rule each load group follows.

The table and the mode set the rule for every group. The supply voltage converts groups given in kilowatts into amperes. The phase count divides the total. In the living units mode, the unit count on each phase drives the result. Enter the total unit count and the phase count.

For a block of living units on three phases, the tool divides the unit count by three. Table C1 Note b requires this. Some groups take a list of individual items, not one quantity. Some groups are by assessment and add nothing. A note appears above the regulation 59 thresholds.

Yes. The table, the mode, the voltage, the phases and every load row sit in the page address. Copy the link to send the same demand assessment to somebody else. Saving it under a project name needs an account. New Zealand conditions are the default.