Oh ok. I think I'm following better now. Grounding metal gizmo chassis is for internal gizmo faults. If it's not grounded then anything (or person) could become part of the return circuit if touching metal gizmo and frame.
So a hot wire chaffing and shorting to cause a fuse to clear isn't what we're addressing here.
So a hot wire chaffing and shorting to cause a fuse to clear isn't what we're addressing here.
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