Construction workers suffer the most electrocutions among all industries. Major reasons for electrocution in the construction industries are workers contact with the power line or material handling equipment contact with the power line. To prevent the electrical accidents, in the construction or any other industry there is a need for warning devices. Since, there is no electrical contact warning devices available in the market, two different types of warning devices are proposed in the present work for the safety of human workers and equipments. Computer modeling is done in ANSYS to simulate human wrist in electrical proximity and electrical contact conditions. For the prevention of equipment related accidents, a low cost warning device has been developed using IC CD 4033. Warning device for the worker is envisaged by using elastic conductive cuffs around the wrist of the worker. Since, human wrist is analogous to hog leg, several experiments were conducted using hog leg specimen. To amplify the voltage across the pair of cuff fixed in the hog leg specimen an instrumentation amplifier is designed and developed.