Those movies were like the bad driver’s ed movies with the gory post crash scenes. I had to take some of those classes at LLL as well when I was doing work there. It was easier to certify as a contractor going to their classes than doing it with a third party.
Semi-infinite? The common term for utility power in my former line of work was “infinite bus”. -D > On Nov 2, 2019, at 12:58 PM, Craig via Mercedes <mercedes@okiebenz.com> wrote: > > On Sat, 2 Nov 2019 06:41:57 -0400 Dan Penoff via Mercedes > <mercedes@okiebenz.com> wrote: > >> There’s nothing scarier (to me) than working on high voltage equipment >> when it’s energized. It was rare, but on occasion I had to do it when I >> was working in the business. Some places like hospitals or air traffic >> control centers simply don’t have maintenance windows. >> >> I took all the same classes and training the linemen did except the >> pole related stuff. Still scared the crap out of me. >> >> I had a journeyman lineman tell me one time that, “When you stop being >> afraid of it is when it kills you.” Point well taken. > > While working at Los Alamos National Laboratory, I had to take many > classes on electrical safety. The 800 MeV accelerator was a major safety > hazard, not only from utility voltages but also energy stored in large > capacitors charged up to high voltages. One of the things strongly > emphasized was there is a night and day difference between 220 VAC > and 480 VAC. > > At 480 VAC and up, there is enough energy in an arc to heat up and ionize > the air into a self-sustaining arc. Since this is fed by the local > utility, there is a semi-infinite amount of energy to drive and heat up > the arc, incinerating anything close to it. The arc-resistant space suits > and gloves people working on 480 VAC and up distribution panels are > required to wear are amazing, as were the videos surveillance cameras took > showing people causing an arc and the pictures of the results when they > did not wear the proper personal protective gear. > > > Craig > > _______________________________________ > http://www.okiebenz.com > > To search list archives http://www.okiebenz.com/archive/ > > To Unsubscribe or change delivery options go to: > http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
