Great topic Tom. I would add to the discussion that “examining” from 110.26 is done while energized because we have to test for the absence of voltage at the point of work “non fused disconnect” and the testing for the absence of voltage is defined as “working on” in 70E. Then we can establish an electrically safe work condition. To preform the maintenance
Testing is energized work. The potential is there until it is verified for absence of voltage. Using a portable test instrument first on a known live voltage source. Then on the “potentially de-energized parts” for the absence of voltage. Lastly the test instrument back to a known voltage source. Then you can say it is de-energized. Still have to meet all the requirements of article 120 of NFPA 70E then we have an “electrically safe work condition”.
Great topic Tom. I would add to the discussion that “examining” from 110.26 is done while energized because we have to test for the absence of voltage at the point of work “non fused disconnect” and the testing for the absence of voltage is defined as “working on” in 70E. Then we can establish an electrically safe work condition. To preform the maintenance
Testing is energized work. The potential is there until it is verified for absence of voltage. Using a portable test instrument first on a known live voltage source. Then on the “potentially de-energized parts” for the absence of voltage. Lastly the test instrument back to a known voltage source. Then you can say it is de-energized. Still have to meet all the requirements of article 120 of NFPA 70E then we have an “electrically safe work condition”.