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Lessons Learned

 

 

Document Name Comments Detailed Comments Date Doe Facility
Deficiencies in identification and control of electrical hazards during excavation have resulted in hazardous working conditions    On March 1, 2004, a subcontractor trackhoe severed two 3-inch conduits while removing a foundation, causing a circuit breaker to trip. One conduit contained an energized 110/208-volt electrical line and the other contained a telecommunication line. The subcontractor did not know that the prime subcontractor had installed temporary utility lines to the building. 3/2004 Los Alamos National Laboratory
Document Name Comments Detailed Comments Date Doe Facility
Deficiencies in work planning and hazards identification have resulted in electrical near misses when performing blind penetrations and core drilling    On January 24, 2004, while core drilling into a concrete floor, the drill cut through an embedded conduit containing an energized 110-volt lighting circuit causing a circuit breaker to trip. Cutting water was found dripping out of a light fixture 15 feet from the work location. A scan showed embedded material consistent with rebar. 3/2004 Hanford Energy Research Programs
Document Name Comments Detailed Comments Date Doe Facility
Near Miss to Electrical Shock   Following a wall penetration at the National Ignition Facility to install seismic anchors, it was discovered that an electrical circuit breaker tripped due to a drill accidentally severing an energized 120-volt wire. There were no electrical shocks. The event was discovered during troubleshooting of office equipment which unexpectedly quit working. All electrical work of this type was suspended, and an investigation was conducted. 4/25/06 Lawrence Livermore National Lab.
Document Name Comments Detailed Comments Date Doe Facility
Near Miss During Excavation Work at the RTC   During excavation activities at the Reactor Technology Complex, a backhoe severed a buried electrical wire. The wire was later found to be de-energized. Work was stopped, appropriate notifications were made, and a critique was held. 5/16/06 Idaho National Laboratory
Document Name Comments Detailed Comments Date Doe Facility
Worker Strikes 120v Circuit Within Modular Furniture Power Pole  

While replacing a ceiling tile, an employee cut into an energized 120-volt circuit while cutting through a plastic power/communications pole that was attached to modular furniture. The employee was not shocked...

7/18/06 Los Alamos National Laboratory
Document Name Comments Detailed Comments Date Doe Facility
Cut 110 Volt, Three Conductor Wiring, Zone 4 Magazine   During excavation activities near the Zone 4 magazine, a tracked excavator cut an energized 110-volt wire to a receptacle that was mounted on a wooden post. There was no electrical arc, the breaker did not trip, and there were no personnel shocks. It was later determined that the contractor did not request a lockout/tagout of the circuit... 8/4/06 Pantex Plant
         

 

 

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Safety of Accelerator Facilities Committee website
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May 2007 Electrical Safety Month @ SLAC
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EM Safety Alerts 2005-02
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Helpful Articles

(UL) November '05 issue of Code Authority
How Can I Tell if the UL Listing Mark is Counterfeit?


Mitigation for Halogenated Cable Types 
Fiber-Guard®/LSZH™ Low Smoke Zero Halogen
 

 

 

 

 

 

 

 

 



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