Where must the SCCR be marked on equipment that is used to indicate its short-circuit performance?

Where must the SCCR be marked on equipment that is used to indicate its short-circuit performance?

• A. On the exterior of the equipment
• B. On the interior only
• C. On the nameplate only
• D. Not required

Answer: (A)

SCCR marking must be visible on the exterior of equipment so installers and inspectors can quickly verify the device’s fault-current tolerance before installation or during maintenance. The short-circuit current rating indicates the maximum fault current the equipment can safely withstand or interrupt. If this rating were only on an interior nameplate or not marked at all, it could be missed, obscured, or require opening the enclosure to check, which delays safety checks and increases risk. Exterior marking provides immediate visibility for proper coordination with upstream protective devices and ensures compliance with safety standards.

SCCR marking must be visible on the exterior of equipment so installers and inspectors can quickly verify the device’s fault-current tolerance before installation or during maintenance. The short-circuit current rating indicates the maximum fault current the equipment can safely withstand or interrupt. If this rating were only on an interior nameplate or not marked at all, it could be missed, obscured, or require opening the enclosure to check, which delays safety checks and increases risk. Exterior marking provides immediate visibility for proper coordination with upstream protective devices and ensures compliance with safety standards.