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IDNO Loads

me1899
HI All


Just come across the attached - a snippet from an IDNO's documentation about loads for residentials.


Loads a lot lower than I am used to - what are peoples thoughts on this?


I would not be comfortable going down that low - e.g. an all electric flat with panel rads and a 3kW cylinder - don't see how you could drop down so much.


i tend to see 4.5 to 5.5 kVA for all electric flats, lowerend being for single bed units and 5.5 for two bed

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  • 0
    The published figures are reasonable as an average over a large number of dwellings. 1Mw for 333 houses each electrically heated is reasonable.

    Not applicable to small numbers though.

    If two dwellings each have an electric shower, both might be used at the same time, if hundreds of dwellings have electric showers only a small number will be used at the same time.

    Out of say 200 houses, 15% might be empty and consuming almost no electricity (5% awaiting sale, and another 5% on holiday, and a third 5% out during the peak hours for pleasure or shift work)

    Another few might have had wood stoves or oil heating added despite being planned as all electric.


    And of course DNOs get away with pushing cables and transformers far beyond "normal" ratings due to cold weather and to short term loading.
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  • 0
    The published figures are reasonable as an average over a large number of dwellings. 1Mw for 333 houses each electrically heated is reasonable.

    Not applicable to small numbers though.

    If two dwellings each have an electric shower, both might be used at the same time, if hundreds of dwellings have electric showers only a small number will be used at the same time.

    Out of say 200 houses, 15% might be empty and consuming almost no electricity (5% awaiting sale, and another 5% on holiday, and a third 5% out during the peak hours for pleasure or shift work)

    Another few might have had wood stoves or oil heating added despite being planned as all electric.


    And of course DNOs get away with pushing cables and transformers far beyond "normal" ratings due to cold weather and to short term loading.
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