The mats are equipped with a Ground Fault Circuit Interrupter (GFCI) located below the plug. This GFCI is designed to immediately cut off all power to the mat if it detects a current leakage of more than 6mA. Therefore, in the event of a cut in the mat that could potentially cause harm, the GFCI will promptly detect it and shut off all power to the mat. Additionally, all HeatTrak products are rigorously tested and TUV certified to UL499 standards.