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Electricity has been generated in power stations since 1882. Due to increased efficiency, world energy consumption was cut down by 1.5% in 2009, for the first time since World War II. The continuous increase in efficiency will result in less electricity needed for a given demand of electrical power. But since the demand will continue to grow (mostly because of the electrification of heating and transportation and the growing economies in developing countries), the world energy consumption is …

An arc flash occurs when an electrical current leaves its intended path and travels from one conductor to another. This may result in fire, flying objects (traveling at more than 700 mph), blast pressure, sound blast (exceeding 160 dB) and heat (exceeding 30,000 F). If an arc flash makes contact with a person, injury and death may occur depending on proximity of the worker to the source, temperature, and time for the circuit breaker to be disengaged. OSHA last issued an arc flash related rule …