WAC 296-307-37618
WAC 296-307-37618. Lighting for employees working near exposed energized parts
(1) Employees must not enter spaces containing exposed energized parts, unless lighting is provided that enables the employees to perform the work safely.
(2) Where lack of lighting or an obstruction prevents an employee from seeing the work to be performed, employees must not perform tasks near exposed energized parts. Employees must not reach blindly into areas that may contain energized parts.