In addition to high voltage circuit grounding with ground-connecting switching devices, for additional operator safety and confidence, portable grounding straps may be used. What is the proper procedure for connecting these portable grounding straps?
• Order of making and breaking electrical connections for safety • Purpose of a ground (earth) connection on high-voltage equipment • Risk of creating a live, ungrounded common point while you are handling leads
• If something becomes energized while you are installing the strap, which point would you want to be solidly connected to the hull first? • When removing the portable grounds, should you reverse the order of how you installed them for safety? What does that imply about the safest order for installation? • Which sequence avoids having your hand or body be the only path to ground if a phase becomes live unexpectedly during connection?
• Which step ensures the ground reference (hull) is established before any phase conductors are tied into the common point? • Which options would ever leave the common point floating (not solidly grounded), even momentarily, while a phase might be connected? • Confirm which sequence is standard in electrical safety practice: ground first or last when applying safety grounds.
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