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Old 09-24-2019, 10:58 AM   #5
diver dave
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City: Fairport
Country: United States
Join Date: Jan 2017
Posts: 1,736
The overriding shock safety issue, with a metal case, is to insure there is no hazardous voltage present on the case, vs local earth. If hazardous voltage exists within the box (and there is), then either a double insulated rating is used, or, a locally grounded case. The instruction manual should give guidance.
Unless otherwise indicated, I would bond the case to a local ground point.
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