An electrical cable which has been pulled out of the ground. There is a hole in the insulation and bare copper is visible, due to stray current corrosion.

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   Garry Keenor (25kv@mas.to)'s status on Monday, 22-Jan-2024 02:07:18 JST Garry Keenor

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   DC return current will therefore enter any adjacent conductive materials such as water pipes, building foundations and other important services. Where that stray current leaves the service, it will corrode it. Managing DC stray currents can be a major headache for any DC electric railway. AC electrification does not suffer from this problem.