Applies to the prevention of electric shock to arc welders. Sets out requirements for safety of circuit wiring on welding machines and ancillaries, and the precautions to be taken when welding. The appendices illustrate and describe the correct method of connection between adjacent machines to minimize the likelihood of electric shock across adjacent welding leads. Examples of recorded fatal welding accidents are included and procedures for rescue and resuscitation in the case of electric shock are described and illustrated.