Plug and Pray

While most of the heavy metal here in Nevada runs on diesel (to the tune of almost 1,000,000 gallons a month) the big shovels in the open pit use electricity to move and dig. Giant extension cords are draped around the pit to provide the needed power. 

Here is a stand near one of the shovels with the male and female adapters locked together. The table is about 2 feet by 4 feet. The voltage used is 7200 Vac and there is a special pin located in the plug which signals the transformer feeding the shovel to shunt the power making it safe(?) to handle.