| Table 8.13.A. U.S. Transmission Circuit Sustained Automatic Outage Counts and Hours by Cause Code and by NERC Region, 2024 |
| AC & DC Circuit Outage Counts | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sustained Outage Causes | frcc | mro | npcc | rfc | serc | spp | tre | wecc | Contiguous U.S. |
| TOTAL | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Percentage of Total AC & DC Circuit Outage Counts | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sustained Outage Causes | FRCC | MRO | NPCC | RFC | SERC | SPP | TRE | WECC | Contiguous U.S. |
| TOTAL | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| AC & DC Circuit Outage Hours | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sustained Outage Causes | frcc | mro | npcc | rfc | serc | spp | tre | wecc | Contiguous U.S. |
| TOTAL | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Percentage of Total AC & DC Circuit Outage Hours | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Sustained Outage Causes | FRCC | MRO | NPCC | RFC | SERC | SPP | TRE | WECC | Contiguous U.S. |
| TOTAL | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Notes: Detailed information on the Transmission Availability Data System outage causes is available at: http://www.nerc.com/docs/pc/tadswg/Appendix%207%2020101202a%20clean.pdf Source: U.S. Energy Information Administration, Form EIA-411, "Coordinated Bulk Power Supply Program Report." |