NEC 700.5(F) requires the SCCR for emergency system transfer equipment to be field marked on the equipment's exterior.

NEC 700.5(F) requires the SCCR for emergency system transfer equipment to be field marked on the equipment's exterior.

• A. True
• B. False
• C. Not required
• D. Only for certain installations

Answer: (A)

The essential idea is that emergency system transfer equipment must have its short-circuit current rating visibly marked on the outside so it’s easily seen by installers and inspectors. This field marking ensures everyone can verify that the equipment can safely interrupt the maximum fault current present at the site, reducing the risk of arcing, overheating, or equipment failure during an electrical event. The SCCR isn’t left in manuals or inside panels; having it on the exterior makes it readily accessible for ongoing safety checks and proper coordination with the system’s available fault current. This requirement applies broadly to emergency system transfer equipment, not just to certain installations, so the field-marked SCCR on the exterior is the correct practice.

The essential idea is that emergency system transfer equipment must have its short-circuit current rating visibly marked on the outside so it’s easily seen by installers and inspectors. This field marking ensures everyone can verify that the equipment can safely interrupt the maximum fault current present at the site, reducing the risk of arcing, overheating, or equipment failure during an electrical event. The SCCR isn’t left in manuals or inside panels; having it on the exterior makes it readily accessible for ongoing safety checks and proper coordination with the system’s available fault current. This requirement applies broadly to emergency system transfer equipment, not just to certain installations, so the field-marked SCCR on the exterior is the correct practice.