Electric Hazard (EH) boots and shoes are designed to impede the flow of electricity through the boot and to ground, reducing the possibility of electrocution (ASTM F2413-05 Sec. 7.1.5.2).
Electrical hazard shoes are not designed to be the primary source of protection in an electrical hazard environment. They are designed to be a secondary source of protection in an electrical hazard environment. (ASTM F2413-05 Sec. 5.5.4 & Sec 5.5.2)