There are geographical variations regarding the electrical power supplied to homes, buildings and facilities. The variations are mainly in the voltage and the frequency.
– Worldwide line voltage values can be divided into two ranges: the 100V to 127V range and the 220V to 240V. The 100V to 127V range is more subject to electrical fires due to higher currents in these systems.
– Worldwide line frequency values can be divided into two ranges: the 50 Hz areas and the 60 Hz areas.
Additional geographical aspects of electrical-faults include: