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Lighting Ud

lyledunn

The search tool seems useless on my IPad so forgive me for asking something that has likely been answered before. Why is voltage drop restricted to 3% while other loads are allowed 5%?

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    Whilst many modern types of LED driver circuit will accept a wide range of in put voltage, that is not the only factor to consider.

    Voltage drop represents energy paid for but not serving any useful purpose. At a time of increasing energy costs and growing environmental concerns we should be seeking to reduce voltage drop, not looking for ways to justify greater losses.

    Consider for example a lighting circuit in a shop with a load of 1000 watts and voltage drop of 5%. That represents a loss of 50 watts. If the lighting is used for 4,000 hours a year then 200 kwh is wasted a year.

    200 kwh a year is likely to cost at least £50 a year or £500 over a conservative 10 year life of the installation. Reducing this waste from 5% down to 2.5% could therefore save £250 PER CIRCUIT over an estimated 10 year life. Larger cable starts to look like a wise investment.

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  • 0

    Whilst many modern types of LED driver circuit will accept a wide range of in put voltage, that is not the only factor to consider.

    Voltage drop represents energy paid for but not serving any useful purpose. At a time of increasing energy costs and growing environmental concerns we should be seeking to reduce voltage drop, not looking for ways to justify greater losses.

    Consider for example a lighting circuit in a shop with a load of 1000 watts and voltage drop of 5%. That represents a loss of 50 watts. If the lighting is used for 4,000 hours a year then 200 kwh is wasted a year.

    200 kwh a year is likely to cost at least £50 a year or £500 over a conservative 10 year life of the installation. Reducing this waste from 5% down to 2.5% could therefore save £250 PER CIRCUIT over an estimated 10 year life. Larger cable starts to look like a wise investment.

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