The plastic prong is on devices that don’t get their protection from having an earthed case but by having double insulation. They should have a square with a square inside symbol.
If an item has exposed metal that might become live then they connect it to earth to prevent this.
If an item has no exposed metal, what would you connect the earth to?
The plastic prong is on devices that don’t get their protection from having an earthed case but by having double insulation. They should have a square with a square inside symbol.
If an item has exposed metal that might become live then they connect it to earth to prevent this.
If an item has no exposed metal, what would you connect the earth to?