Mains electricity is nothing but main source of power in an
installation. From the mains the power is then branched out to
different end usage.
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The least amount would be a small battery. Some systems are
required to have connection power mains with a BACKUP battery.
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Mains electricity is nothing but main source of power in an
installation. From the mains the power is then branched out to
different end usage.
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The switch is internal. If you plug into the mains, power will
be supplied by the mains and the battery will begin charging. If
you unplug from the mains, the battery takes over.
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A mains lead is the power cable for the strip heater. The mains lead is single-insulated.