How to use and transpose the transformer equation 

This video gives you a step by step guide, detailing the two ways you can use and transpose the transformer formula. A fully worked example, with values, to show how to use each method.
BS7671 18th Edition amendment 2
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On - Site Guide 18th Edition amendment 2
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Casio Scientific Calculator
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Multi coloured pen
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15cm ruler
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30cm ruler
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Folding ruler
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Black writing pens
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