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| AIR Report/Revision Number | 2000-397 |
| Company Incident Number | 00103 |
| Company/Site Code | NA |
| Day/Date/Time | Mon 4/24/00 |
| Distribution | Instructive AIR |
| Site Infrastructure Availability Failure | No |
| Source | Technician |
| Root Cause Category | Site Operations |
| Root Cause Type | Adjustment |
| Save Type | Hard |
| Save | Site Uptime Network |
| Infra. System | Critical Power Distribution |
| Subsys/Comp | Bolt-on Molded Case CB |
| Company Component ID | |
| Manufacturer | |
| Model/Capacity | 1-20amp & 1-30amp bkr |
| Year Manufactured | |
| Info 1 | Load Panel |
| Info 2 | |
| Info 3 | |
| Incident Involved An Activity | Yes |
| Incident Involved Hot Work | Yes |
Incident Description
Our electricians were installing some new circuits in a breaker panel when they noticed two of the breakers arcing at the bus bar (the screws holding the breakers in place had been cross-threaded). They stopped the installation of the new breakers and traced what the two defective breakers served. It was decided that the breakers fed some critical equipment, and a window would be needed before repairs could be made.
Action Taken
At our last Site Uptime Network conference, I learned how another member company had made repairs to breakers without shutting down the equipment by installing a bypass around the defective breakers. We talked to our electricians about this procedure and decided to proceed with making repairs using a bypass.
Final Resolution
We installed the bypass, repaired the breakers, and saved our company down time and money.
Synopsis
Our networking and conversation at the Site Uptime Network evening social hour sure paid off for us.
Our electricians were installing some new circuits in a breaker panel when they noticed two of the breakers arcing at the bus bar (the screws holding the breakers in place had been cross-threaded). They stopped the installation of the new breakers and traced what the two defective breakers served. It was decided that the breakers fed some critical equipment, and a downtime window would be needed before repairs could be made. At our last Site Uptime Network conference, I learned how another member company had made repairs to breakers without shutting down the equipment by installing a bypass around the defective breakers. We talked to our electricians about this procedure and decided to proceed with making repairs using a bypass.
We installed the bypass, repaired the breakers, and saved our company down time and money.
