Q&A

In the UK, the statutory supply band for electricity is now 230V -10% to +10% (i.e. 207V to 253V), following European harmonisation in 1995.  However, the average voltage supplied from the national grid is 242V, whereas the average European voltage is 220V.

Most electrical equipment used in the UK is manufactured to European standards, designed for 220V and will operate effectively down to 200V. By forcing appliances to operate at a higher voltage in the UK leads to significantly higher energy consumption, increased heat losses and a reduced life span. “A 230V linear appliance used on a 240V supply will take 4.3% more current and will consume almost 9% more energy.”  (Electricians Guide 16th Edition BS7671). It is estimated that 90% of sites in the UK are operating at too high a voltage and could therefore benefit from installing a powerPerfector.