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Solar panels or modules are becoming popular in residential and some commercial sites for providing either the primary power source or a backup source of electricity. The advantages seem obvious and on the surface they seem to be a safe option. Photovoltaic power systems do have many benefits, but there are also safety issues that come into play with them during their installation, maintenance and...
This paper describes the sequence of events that lead to a near-fatal accident on a 4.16 kV power system that was undergoing maintenance. All parties concerned believed the equipment was properly locked out and tagged out of service. A breakdown in communication between the equipment owner/scheduler, the primary contractor and a subcontractor allowed a service technician to enter an energized switchgear...
The arc flash task tables were introduced in the 2000 edition of NFPA 70E(1). They have remained basically unchanged since then. The 2015 edition of NFPA 70E(2) presents arc flash task tables that follow a “clean sheet” approach and do not resemble the previous edition's tables at all. This paper covers the new Table Method in detail, as well as some of the thought process behind it.
This paper reviews some of the more common electrical safety myths and misconceptions field electrical workers often have. Many of these misconceptions continue in spite of training and education. Some are handed down from worker to worker, similar to tribal knowledge. The real danger from these misconceptions is that they impede the truth and cause electrical workers to misjudge hazards and risks.
This paper reviews some of the more common electrical safety myths and misconceptions field electrical workers often have. Many of these misconceptions continue in spite of training and education. Some are handed down from worker to worker, similar to tribal knowledge. The real danger from these misconceptions is that they impede the truth and cause electrical workers to misjudge hazards and risks.
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