An OCPD specified to help an apparatus achieve an SCCR may be integral to the apparatus or located on the line side.

An OCPD specified to help an apparatus achieve an SCCR may be integral to the apparatus or located on the line side.

• A. True
• B. False
• C. Only integral
• D. Only line side

Answer: (A)

The main idea is that SCCR depends on the protection in the entire fault-current path into the equipment. The Overcurrent Protective Device that helps achieve that SCCR can be either inside the apparatus (an integral OCPD) or placed on the line side (external protection). Both placements limit fault current entering the equipment and, when combined with proper wiring and components, can meet the required SCCR. Therefore, this statement is true.

The main idea is that SCCR depends on the protection in the entire fault-current path into the equipment. The Overcurrent Protective Device that helps achieve that SCCR can be either inside the apparatus (an integral OCPD) or placed on the line side (external protection). Both placements limit fault current entering the equipment and, when combined with proper wiring and components, can meet the required SCCR. Therefore, this statement is true.