When completing repairs on a high voltage circuit where portable grounding straps were used for increased operator safety and confidence, what is the proper procedure for disconnecting these grounding straps?
• Grounding straps purpose during high-voltage work • The concept of a safe discharge path for any remaining or induced voltage • Why removing a ground connection in the wrong order can make the operator or equipment become the return path
• If some charge is still present on the system, what path will that current take depending on which clamp you remove first? • Which part of the grounding setup should remain connected the longest to ensure the equipment always has a low-resistance path to hull/earth? • In which sequence are you least likely to be the only connection between the energized conductor and ground?
• Identify which point in the system is the main reference to hull/earth and which points are the individual phases. • Think through what happens if the hull/earth connection is opened while phase conductors are still tied to the common point. • Verify which sequence keeps a solid ground path in place until all phase conductors are safely isolated.
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