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A disconnecting means that has a continuous ampere rating not less than that calculated in 610.14(E) and (F) shall be provided between the runway contact conductors and the power supply. The disconnecting means shall comply with 430.109. This disconnecting means shall be as follows:
  1. Readily accessible and operable from the ground or floor level
  2. Lockable open in accordance with 110.25
  3. Open all ungrounded conductors simultaneously
  4. Placed within view of the runway contact conductors
Exception: The runway conductor disconnecting means for electrolytic cell lines shall be permitted to be placed out of view of the runway contact conductors where either of the following conditions are met:
  1. Where a location in view of the contact conductors is impracticable or introduces additional or increased hazards to persons or property
  2. In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment

Related Code Sections

610.31 Special Equipment, Runway Conductor Disconnecting Means
within view of the runway contact conductors Exception: The runway conductor disconnecting means for electrolytic cell lines shall be permitted ...
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