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- Electrical Basics

After Shock

Published Monday, June 01, 2009

On August 16, 2007, Master Electrician William Giffen, owner of CAMAND Electrical Services, Ottawa, Canada, and experienced 17-year veteran of electrical maintenance services, was testing secondary fuses at a high-tech data center (after it was hit by lightning for the second time that day) when he was caught in an arc-flash incident at a 13.8kV switch. “I misread how the switch was designed and didn't realize that the switch was back-fed,” explains Giffen, meaning that he assumed the switch was dead when, in fact, it was live. Earlier that day, wearing the appropriate personal ...

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in this issue

Deadly Arc Flash
Troubleshooting Tips
Commercial Load Calculations

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