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Maximum demand

lyledunn

Is this my maximum demand?

Or is the data logger on since just before Christmas which shows a short spike of just over 26A, correct? My house. 

The NICEIC now require all approved contractors to justify their assessment of maximum demand when they are responsible for the design of a new installation or alteration or addition. Reference to the OSG is in chocolate fire guard territory!

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    I'd add that demand is caused by loads, rather than circuits.  Circuits are typically designed to meet a large number of requirements, load only being one of them. Unless you're in a fully populated medium sized mansion you probably don't need  4x32A rings plus a 20A radial as far as load is concerned (traditionally that lot would serve around 450m² of floor space - i.e. between 4 and 5 times a typical 3-bed semi, so including 4 or 5 kitchens). It would be equally valid to come up with a theoretical design with the minimum size/number of circuits that could supply the actual loads, and base you MD on that.

       - Andy.

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    I'd add that demand is caused by loads, rather than circuits.  Circuits are typically designed to meet a large number of requirements, load only being one of them. Unless you're in a fully populated medium sized mansion you probably don't need  4x32A rings plus a 20A radial as far as load is concerned (traditionally that lot would serve around 450m² of floor space - i.e. between 4 and 5 times a typical 3-bed semi, so including 4 or 5 kitchens). It would be equally valid to come up with a theoretical design with the minimum size/number of circuits that could supply the actual loads, and base you MD on that.

       - Andy.

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