World Electricity Supplies:Voltages and frequencies

Any exporter of electrical goods needs to know the power supply of their potential customers. This
publication lists the values and tolerances expected in over 200 countries. It covers: Supply voltages -
domestic, commercial and industrial installations; voltage tolerance; frequency and tolerance;
transmission and distribution voltages; supply circuits, phases and earthing. To keep you informed
of key developments, an update service is available, which is available to you free of charge for the
first year, after which you can renew for an annual fee.