Attachment 18483
Attachment 18484
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It doesn't need to be grounded to act as a Faraday cage (e.g. a car's body isn't grounded but will protect its occupants from a lighting strike), but if you don't ground it and it is well insulated from ground, then it can get charged to high potentials and cause shocks when touched.
hope my intent wasn't foiled , think i successfully complemented BYOG ... = silver lining
any other dad puns b4 we wrap this up?