Page 39 - Occupational Health & Safety, September 2018

2002 version of those equations into its own standard, NFPA 70E. OSHA (Occupational Safety and Health Administration) refers to NFPA 70E for its regulatory approach in the United States. In Canada, the sister standard to 70E, CSA Z462 (Canadian Standards Association), is referred to within its borders as the go-to standard for electrical safety and arc flash.
Cover All Your Bases
Let’s cover all the steps involved with incident energy analysis and the time it takes to get it done. We’ll also discuss the pros and cons of each methodology from a safety standpoint, and why ESH man- agers and safety engineers should be open to promoting either way within their company. You must get it done one way or another.
First Steps for Incident Energy Analysis
What is the first step with incident energy analysis? With the re- verse-study method, the first step is labeling. Yes, first you go and apply the labels using the reverse-study tables. To do that, you have to check a few things in the field at each location (such as upstream transformer kVA), and then you select and apply a pre-printed label using a table. Using the other method for incident energy analysis, the one where an engineering study is still required to be done, you do a walk-down and complete data collection. So these are your first steps. . . .
Correcting code violations is often up to opera- tions or maintenance managers, sometimes
a safety professional, and occasionally an electrical engineer.
When you are completing either of the first two steps, you must send someone familiar with electrical code compliance. They must identify code violations and take note of them so they can be raised to management for resolution. The equipment must be marked as extra-hazardous and de-energized for hot work in all circumstanc- es until the code violation is fixed, unless it is a matter unrelated to the arc flash hazard. Correcting code violations is often up to operations or maintenance managers, sometimes a safety profes- sional, and occasionally an electrical engineer.
Second and Third Steps for Incident Energy Analysis
What is the second step with incident energy analysis? Well, la- beling is already completed with the reverse-study method. If data were collected during labeling to produce a one-line, or update an old one, then this is the second step. In the case where you collected data for an engineering study, well, this costly and time-consuming step has to be done now. The engineering study will create a one- line from the engineering software. It also will create reports so
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