Maximum demand is defined as the greatest average load (typically measured in amperes or kilovolt-amperes) likely to be drawn by an electrical installation under normal operating conditions over a specified interval. It is not a simple sum of every circuit breaker’s rating; if one added every light, power point, and appliance rating in a house, the total would be far higher than any actual real-world draw. This is where Table C1 comes into play.
In the context of electrical engineering (specifically within Australia and New Zealand), is found in AS/NZS 3008.1.1 (Electrical installations - Selection of cables). maximum demand table c1
While the actual calculation of Maximum Demand (the math to figure out how much current a building needs) is done using tables in —specifically Tables 2 to 9—Table C1 in AS/NZS 3008 is the first step in selecting the correct cable size after you have calculated that demand. Maximum demand is defined as the greatest average