Demolition is fraught with potential safety concerns itself. When mixed with electrical components, the danger level reaches new heights. Whether you’re demolishing sections of a structure or outsourcing this activity to a demolition professional, here are a few essential tips to remember. 

  1. If, during demolition, any powerlines are downed, do not attempt to fix them yourself. Even highly trained electrical or demolition experts will notify the proper authorities with the utility companies to best mitigate the situation to avoid dangerous contact with the downed wires.
  1. Electrical devices should never be utilized while having contact with water or even upon any ladders or other structures in contact with water. This includes ladders, stools, and the like. 
  1. Leave the demolition or operation of electrical components to trained electricians or, if possible, work under their supervision and approval. 
  1. In many older properties, you may notice that the plug outlets only contain 2-slot female inputs. These outlets are not grounded. The proper precautions should be observed when either using them or working around them. Also, keep in mind that a 2-slot-to-3-slot adapter does not suffice in grounding any tool used in such an outlet.
  1. Electric cords, including industrial-strength extension cords, should never be laid where vehicles may drive over them. This not only damages the wires but increases the risk of electric shock from contact with the cord or touching components. 
  1. Never utilize equipment with extension cords that warns against such activity on its labels. Such equipment includes specific power tools, space heaters, and other power-heavy devices. Extension cords are typically not rated to handle the amount of electricity that these devices demand. The result may be injury or even fire. 
  1. No one should be responsible for either using electrical equipment or electrical testing duties with the proper training. 
  1. Before any demolition is to take place, all connected wires or cables should be completely disconnected from their primary power source by a certified electrical professional.
  1. All wiring and cabling should be thoroughly inspected before use. The wires and cables should be checked for cracks, worn spots, burn marks, holes, and exposed metal. 
  1. When in doubt about the use of a particular electrical component or scenario, always consult a professional electrician. 
Source: http://dtwreckit.com/blog/posts/view/241/10-electrical-safety-tips-for-demolition-projects