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Question 142 September 2002

Working with Different Voltages

Has anyone had experience working with different voltages and frequencies within the same area? We work with conventional ground power at 240V, 50Hz, but our aircraft engineers also want to work with 110V, 400 Hz within
the same area. Since these voltages/frequencies are related to aircraft equipment they are outside the IEE Wiring regulations. We are trying to
work within best practice. Guidance in this area is thin on the ground and seems to be limited to fundamental principles such as protection against thermal effects and overcurrent, selection and erection of wiring systems,
isolation and switching, Inspection and testing etc. Any help would be much


The following 3 companies answered this question:

  • Rolls Royce
  • GKN
  • Tata Steel Europe

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