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10 Cards in this Set
- Front
- Back
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In an installation where appearance is the most important consideration, the most likely choice of a wiring system will be
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Mineral insulated cable
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When calculations show that the voltage drop between the supply terminals and a load will exceed 5% of the supply voltage the action to be taken is to
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Increase the size of the cable supplying the load
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To comply with I.E.E. Wiring Regulations the voltage drop on a three phase 400v motor circuit should not exceed
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16V
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Copper cored data communication cables are made up of pairs of conductors twisted along their length in order to
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Reduce electrical interference
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A component designed to disconnect a supply under full load conditions is
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A switch
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In situations where there is a risk of an explosion due to the presence of fumes and gases electrical switches and control equipment must be
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Mounted in flameproof enclosures
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Supplementary equipotential bonding is likely to be required in all
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Bathrooms
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The T.T. system of earthing is usually used in
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Rural areas
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An earthing system that can only be used in special circumstances and uses a combined neutral and earth conductor in the supply and the installation is the
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T N-C system
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Isolators used to isolate electrical supplies are designed to operate under
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No-load conditions
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