It is a system used to make an educated guess at the maximum demand on the electrical supply to various types of buildings. A house built in a area that is never hot or cold and uses a wood burning stove, might be rated at "x" Watts per square foot. If the house has a floor area of 1,000 sq ft, the maximum demand would be x,000 Watts. These ratings are available from various building organisations and are based on surveys. They vary a lot of place to place because they take account of the climate, the thermal characteristics of the building materials and the gross size of the building. Calculating the maximum demand by this method is often done for the purpose of estimating the size of the street transformer that will be needed in a new estate in the early stages of planning but more accurate calculations are still needed to determine the final figures.
April 9th, 2010 at 4:03 am
It is a system used to make an educated guess at the maximum demand on the electrical supply to various types of buildings. A house built in a area that is never hot or cold and uses a wood burning stove, might be rated at "x" Watts per square foot. If the house has a floor area of 1,000 sq ft, the maximum demand would be x,000 Watts. These ratings are available from various building organisations and are based on surveys. They vary a lot of place to place because they take account of the climate, the thermal characteristics of the building materials and the gross size of the building. Calculating the maximum demand by this method is often done for the purpose of estimating the size of the street transformer that will be needed in a new estate in the early stages of planning but more accurate calculations are still needed to determine the final figures.
References :
April 9th, 2010 at 4:40 am
It should be 3 W/SFT for residence & 15 W/SFT for commercial (with the aircon load)
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