ElecAS

Table C2 Maximum Demand Calculator

Calculate non-domestic maximum demand using AS/NZS 3000 Table C2.

Why this page matters

Calculate non-domestic maximum demand using AS/NZS 3000 Table C2. This static content is published so the canonical route has meaningful crawlable HTML even before the interactive application hydrates.

Who this page is for

Commercial and industrial designers assessing demand for offices, retail, hospitality and mixed-use sites.

Relevant standards

  • AS/NZS 3000 Table C2

What this tool helps with

  • Work through non-domestic load groupings using Table C2 logic.
  • Handle offices, retail, hospitality, health and light industrial facilities.
  • Use the result as an input to downstream cable and protection design.

Reviewed by

Wisam Tozah — Associate Electrical Engineer. B.Eng (Electrical), MIEAust, CPEng, NER, NSW DBP, NSW PRE, APEC, IntPE(Aus). LinkedIn.

Frequently asked questions

When should I use Table C2 instead of Table C1?

Use Table C2 for non-domestic installations: offices, retail, factories, hotels, hospitals, schools and similar premises. Table C1 is only for domestic dwellings and multi-unit residential.

How does Table C2 handle diversity?

Table C2 applies diversity through assessed demand percentages on grouped loads — socket outlets, lighting, motors, cooking, hot water and HVAC are each assessed individually before summing the consumer mains demand.

Can Table C2 be used for mixed-use buildings?

For mixed domestic and non-domestic buildings, calculate each portion separately (Table C1 for domestic, Table C2 for non-domestic) and combine at the main switchboard with appropriate diversity, or use the Table C3 energy-demand method for the non-domestic portion.

What load groups does Table C2 cover?

Table C2 covers lighting, socket outlets, permanently connected appliances, cooking equipment, water heating, space heating and air conditioning, motor loads, and other specific loads with assessed demand factors per AS/NZS 3000.

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