You can’t! Consider all cables and wires energized, whether electrical, cable television or telephone. After a storm any wire can be energized if it falls or gets wrapped around an energized line, whether a few feet or a block away. If a line is in water, there is even more reason to be cautious. Consider it and the water energized. Learn more with our electrical safety videos.
When looking at damaged poles and line, how can I tell the difference between downed telephone, cable television and electrical lines? How can I tell if standing water with wires in it is electrified?
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Power Restoration FAQ