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In which of the following equipment, current rating is not necessary?

  • In Isolator current rating is not necessary.
  • Isolators are typically used in conjunction with other protective devices, such as circuit breakers or fuses, to ensure that the circuit is not switched on until all maintenance work is completed and everything is in order.
  • They are designed to operate under no-load conditions, which means that they should only be operated when the circuit is not carrying any current.
  • Isolators are not equipped with any arc-quenching device and do not have any specified current breaking capacity or current making capacity.