The jobs in Table S-4 (OSHA 1910.332) face a higher than normal risk of electrical accident if exposed to circuits that operate at 50 volts or more to ground. These employees require training respective to their job assignment in electrical safety-related work practices (OSHA standard 1910.331 through 1910.335). Also, employees permitted by their employer to work on or near exposed energized parts must be qualified by training to acquire the skills and techniques to determine voltage of exposed live parts. These training requirements were established by OSHA in August 1990.