Tunnel Lighting Cable Sizing Calculation

For a tunnel boring operation, I have lost a method to calculate the cable size for such a long tunnel - say 3mile length; where there are light fittings periodically along the length of the tunnel, installed as the tunnel excavation proceeds boring from one end only. Any one have something? Regards

Reply to
John McLean
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What happened to "OHMS LAW"?? At 3 miles, you might have to figure on a high voltage trunk and some step down transformers. Does this have to meet some MSHA safety codes? Maybe you do need a consultant.

Reply to
RFI-EMI-GUY

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