Use one hand with your face and body turned to the side when operating a safety switch. Limit possible injuries by not placing body parts directly in front of energized equipment when there is danger of an arc flash. If a device has a metal enclosure or other exposed metal parts then there is a danger that these exposed metal parts could become live during a fault and this could itself cause an electric shock. The voltage on the exposed metal parts during a fault is known as the Touch Voltage.