When working with or nearby electrical installations an electrical shock, arc flash or arc blast can occur and a current can go through the body, due to the following situations:
- Direct contact with live parts of the installation (exposure to live parts)
- Contact with parts that normally are not live, but as a consequence of a fault become live accidentally (indirect contact)
- Existence of potential difference between different points in the ground
The duration of the fault must be limited by the action of protection relays and devices.
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