If you see a victim of electric shock, do not touch them.Above 10,000 milliamperes, the affected person will suffer cardiac arrest, severe burns, and probable death.Between 10 milliamperes, the affected person’s heart will suffer fibrillation, or rapid, irregular contractions.At 50 – 150 milliamperes, breathing is affected, severe muscular contraction occurs, and the affected person will be in severe pain.Above 30 milliamperes, the affected person’s muscles may contract to the point where the person is not capable of letting go of the live circuit.At 6 – 30 milliamperes, electric shock is painful.At 5 milliamperes, shock is not painful, but perceptible and uncomfortable.At 1 milliampere, a person can just barely perceive electric shock.The following is a list of effects of electric shock at varying currents: Most normal electric circuits in the United States are capable of providing 20 amperes (20,000 milliamperes) of electric current. The length of time the body is in contact with the live circuit.The path of the current traveling through the body.The amperage, or amount, of current traveling through the body.Three major factors govern the severity of electric shock: Current from the live circuit will enter the body via whichever part of the body contacts the live circuit, and the current will pass through the body to exit to the ground (if standing on a conductive lift or ladder, the current will pass through the feet to the lift or ladder and then to the ground). Insulators, such as rubber, inhibit the flow of electric current and are used in the jacketing around the individual wires in electrical cable.Įlectric shock occurs when a person (in contact with the ground) becomes part of an electric circuit by coming in contact with a live electric circuit. For example, to power a Genie lift, we need a power supply (wall outlet), two conductors (extension cord), and the load itself (Genie lift).Ĭonductors allow electric current to flow through them. This is how we utilize electric power, or the use of electricity to energize equipment.Ī basic electric circuit requires a power source ( voltage), a conductor ( hot wire) running from the voltage to the load (in our case, equipment to be powered), and a second conductor ( neutral) running from the load back to the power source. positive + positive) repel each other, while oppositely-charged objects (positive + negative) attract each other.Įlectric current is the flow of electric charge along a conductor (i.e. Subatomic particles called protons carry a positive charge, while particles called electrons carry a negative charge. It is the responsibility of every stagehand to understand basic electrical theory in order to safely work around electrically powered equipment.Įlectric charge is the physical property of matter that causes it to experience a force when physically in close proximity to other electrically charged matter. In the theatre, as in most of the rest of modern life, electric power is used to energize equipment.
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