Electricity & EquipmentQuestion 105 of 484
Why is a three-prong grounded plug safer than a two-prong plug on salon equipment with a metal housing?
a.The third prong increases the voltage to the appliance
b.The third prong converts AC into DC
c.The third prong reduces the amperage the appliance draws
d.The third prong connects the metal housing to ground so that a fault current flows safely to earth instead of through the user
Explanation
Grounding gives stray current a safe, low-resistance path to earth. If a wire inside the appliance contacts the metal case, the fault current trips the breaker through the ground wire rather than passing through the person holding the appliance.
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