The labels are required to include the following information
- Nominal system voltage.
- Fault current at the service overcurrent device.
- Clearing time of service overcurrent protective devices based on available fault current at the service equipment.
- Date of label installation.
Labels must be produced and attached to electrical equipment outlined within the study’s scope as mandated by codes and regulations. This equipment should encompass, at minimum, utility company or customer-owned transformers, switchgear, switchboards, panel boards, industrial control panels, meter socket enclosures, adjustable speed drives, machine control panels, and motor control centers. Additionally, the scope may encompass equipment such as busways, bus plugs, fused and non-fused disconnect switches, and motor terminal boxes, among others.
Arc flash labels need to be conspicuously positioned on the electrical equipment. Placement examples include:
- On the front cover of the equipment.
- On the exterior of the equipment enclosure.
- On the breaker door of a switchboard or panelboard.
- On the external surface of the control cabinet for an industrial control panel.
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