The standard covers nonsupervisory work involved in installation, test, repair, and maintenance of electric power plant and/or overhead and underground primary electrical distribution systems. These jobs require knowledge and application of electrical principles, procedures, materials, and safety standards governing work on electrical systems above 550 volts. Two grade levels, WG-8 and WG-10, are differentiated in the description of job duties, skill and knowledge requirements, area of responsibility, the physical effort required, and the working conditions. Two typical work situations are described for the WG-10 level. (Author/AG)