You might notice there is
indication of voltage grade (i.e 600/1000 volt) for every multicore cable. This
voltage grade are conforming the metric British Standards for wiring cables.
The voltage grade of 600/1000 volt indicates that the
cables are designed for a power frequency voltage to earth of 600 volts and a
power frequency voltage between conductors of 1000 volts.
The metric Standard for flexible cords will include the voltage grades 300/300
volt and 300/500 volt.
The grade 300/300 volts indicates that the cord is designed for use on single
phase systems where the voltage to earth and the voltage between conductors do
not exceed 300 volts.
The grade 300/500 volt indicates that the cords are designed for use on systems
where the voltage to earth does not exceed 300 volts and the voltage between
conductors does not exceed 500 volts.
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