Second most codes do not require that these

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required to install and service these low voltage wires. Second, most codes do not require that these connections be made at electrical junction boxes. third, under OSHA regulations, circuits that have less than 80 V fall under less stringent safety requirements. 9.Center tapped transformers allow for a small change in the windings voltage rating by changing taps. 10. Electronic devices may use the metal chassis where components are mounted as a common conductor. If you touch the metal chassis accidentally while there
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is power, you will receive a shock.Isolation transformers are used to break the circuit and protect the technician. 11.Transformer cores are made of thin sheet metal strips in the form of a laminate the voltage induced in the core will cause current, called eddy current, to circulate. Each metal strip is insulated with a thin layer of oxide that resists the flow of eddy currents. This reduces unwanted current circulation through the core and excessive heating of the transformer. 12.The primary winding current is mostly inductive making it nearly as much as90° out of phase with the voltage. The mostly resistive secondary windingcurrent will offset this at higher
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