EATON CH ground fault current interrupters (GFCIs) are 3/4 in W and provide superior safety over a standard electrical outlet in areas where electricity may come into contact with water. GFCIs are required in any application near water such as kitchen countertops, bathrooms, swimming pools, hot tubs and outdoor receptacles. They immediately break the circuit when electrical current leakage is detected, reducing the risk of shock and electrocution.