The fish scaling machine is safe in operation. It is security insulated and tested to 4 000 V and well protected from spray water. The motor has been tested and approved for continuous use. The appliance can be connected to a grounded or non-grounded wall socket. The shaft has four-fold protection, with two layers of steel, on of insulating compound and one layer of plastic. The ball bearings in the scaling head are waterproof. All external parts are rustproof.