![]() ![]() Wouldn't grounding the common, which it obviously doesn't, unless in the event of a short, cause unwanted voltage to continuously energize the chassis or just act as a short? If a person, presumed to be at ground, touched the chassis the current would go to ground through the human. If the chassis was not grounded and a hot wire got loose inside and made contact with the chassis, now the chassis would be hot. The chassis is grounded so that if a hot wire gets loose inside and makes contact with the chassis, the current will take the easier path to ground through the low resistance metal chassis instead of through the human, who is at ground or in contact with ground, touching the chassis. People are assumed to be at ground potential and/or connected to ground somehow by virtue of the inability to hover. The intent of grounding the chassis isn't to help with troubleshooting. ![]()
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