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Example of tracking on unbonded cross arm. Photo by Eskom.
Example of tracking on unbonded cross arm.
Example of spark gap mounted on wood pole to protect pole from damage to lightning flashover and resultant power frequency follow current.

Andreas Beutel

Andreas Beutel ([email protected]) holds BSEE and MSEE degrees as well as a Ph.D. in electrical engineering from the University of the Witwatersrand, South Africa. He is currently chief engineer at Eskom Holdings SOC Ltd. His research interests include electrical distribution, insulation and safety, and lightning and surge protection. Dr. Beutel is a registered professional electrical engineer in South Africa, a Chartered Engineer in the UK and a Fellow of the South African Institute of Electrical Engineers.