According to NFPA 70E, labeling is required for any piece of electrical equipment that may need examination, adjustment, service or maintenance while energized. These labels communicate the electrical hazards an employee may be exposed to, including the potential for an arc flash. formation and meet permanency of marking requirements. Compliance with permanency of marking requirements helps ensure that the labels will adhere to the. Items that should have arc flash warning labels are: Switchboards, Panelboards, Distribution Boards, Industrial Control Panels, Enclosed Circuit Breakers, Motor Control Centers, Disconnects, Safety Switches (fused), Inverters, UPS's, CT Cabinets, Transformers, External Variable Frequency Drives. The Occupational Safety and Health Administration (OSHA) is an organization that provides workplace guidance about electrical safety-related work practices in the form of regulations, like 29 CFR 1910. 333 (a), which emphasizes the use of safety-related work practices to prevent electric shock and. Wire labels are used to match the wiring diagram to the wires in the actual system. Each label corresponds to a labeled line or connection point in the electrical drawing. Pneumatic and hydraulic hoses on a system often follow a similar pattern with their own corresponding diagrams and labels. This. In industrial switch cabinet construction, structured, standard-compliant labeling systems in accordance with DIN EN 81346, DIN EN 60445 and VDE 0660 are essential for the safe commissioning, maintenance and documentation of electrical systems. Follow these strategies to achieve enhanced safety and documentation.
