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AS/NZS 3000:2007Maximum Demand Calculation

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Electrical Terms Maximum Demand – the total maximum electrical power

demanded by a consumer’s electrical installation,measured in Amperes or Watts. (WAER Section 2 - Definitions)

 ADMD – stands for ‘after diversity maximum demand’, is anindicator of the maximum amount of electricity asubdivision consumes (on a per lot basis).

The ‘diversity’ allows for the fact that not all homes in asubdivision will demand their peak electricity at exactly thesame time, which reduces the maximum demand figure.Electrical designers use the ADMD to design the electricalinfrastructure for a subdivision.(UrbanPower, Western Power Publication Issue: 03  – October 2005)

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AS/NZS 3000:2007Clause 1.6.3. Maximum Demand

The maximum demand of an electrical installation shall bedetermined taking into account of the capacity, physicaldistribution and intended use of electrical equipment in theelectrical installation and the manner in which the presentrequirements might vary.

Consumer mains, submains and othe electrical equipment of an electrical installation shall be designed and installed tomeet the maximum demand.

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AS/NZS 3000:2007Determination of Maximum Demand

 AS 3000, Clause 2.2.2.

Maximum demand can be determined by one of thefollowing methods:

a. Calculation – AS/NZS 3000:2007, Table C1

b.  Assessment

c. Measurement – highest demand recorded orsustained over 15 min period.

d. Limitation – current rating of circuit breaker

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AS/NZS 3000:2007 –

Table C1

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AS/NZS 3000:2007 –

Table C1

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AS/NZS 3000:2007 –

Table C1