scope:

PURPOSE

This Marshall Work Instruction (MWI) establishes the Marshall Space Flight Center (MSFC) Electrical Safety Program for all MSFC employees (Civil Service and contractor) that use or work with any form of electrical power while at MSFC. It defines the responsibilities and requirements for ensuring employees are aware of the potential electrical hazards they might encounter from time to time in the workplace.

APPLICABILITY

This MWI applies to equipment/systems operating in the range from 50 to 600 volts that cannot be deenergized and placed in a safe working condition. The placement of Lockout/Tagout (LO/TO) devices are required in accordance with MWI 8715.2, 29 CFR 1910.147, 29 CFR 1910.333 and National Fire Protection Association (NFPA) 70E article 120 during testing, troubleshooting, maintenance, service, repair and construction work on flight hardware/systems and facility equipment/systems. Excluded from this instruction is work performed on highvoltage transmission lines, over 600 volts that is maintained and serviced by the Redstone Arsenal utility organization.