Ryan this has to be in the top best three vidios that you have made. Very informative and great job explaining things. Two things came to my old mind while watching it. We were taught to stand on the right side of safety switches ( if right handed ) turn your head facing 90 degrees from wall or strut safety switch is mounted to then take in a deep breath and hold it while using your left hand to operate the handle. In the event of an arc blast holding your breath should prevent you from inhaling up to 10,000 degree air and not burning your lungs. Standing to the side protects you from a door that could be blown off during an Arc fault/Arc blast event. We bad to hold the open end of rubber gloves closed then roll them up to see if there is any air leaks in finger tips.I had a what looked like a statue that you pull rubber gloves over and it pump air in gloves to check for leaks. I always made sure both my classes of rubber gloves were tested & date stamped every six months.Maybe ten years ago saw where they sold an approved powder to put on your hands before putting on rubber gloves but feel safer to use cotton gloves. Never know they have special PPE rated comfort thin gloves to wick up the sweat from your fingers & hands. Used to buy a dozen thin cotton gloves every few months.
70E is one thing I wish I was taught early on in my career. It seems like everybody was always in a rush they would say just get it done. There is still some old timers out there that think a right of passage is to be shocked by 277.
Agree, although a proper 277v shock is enough to ensure a future healthy skepticism and respect for electrical circuits...😂😂 I kind of equate it to the toddler who touches the hot stove. You do it ONCE and NEVER AGAIN...! 😂😂😂
17:04 Makes me think of days I spent donning a Level 4 Arc Blast Suit to rack K Frames in and out of MCCs in the summer heat. I was so happy when we got a Chicken Switch so we could at least, remotely switch 'em from outside!
Chicken switches should be made mandatory on voltages above 600 volts. Nice not having to wear all of the PPE stuff to open or close a medium voltage breaker.
Only once in my 50 enjoyable years as a sparky have seen a company have a NFPA 70 book. I worked 17 years for a rich fortune 500 company that only purchased one NEC book due to me getting tired running around to find my code book so I locked it up. Same company talked for years about finally purchasing one set of rubber gloves for 6 electricians to share. Told them I don't share safety equipment, meters, rubber gloves, underwear or tooth brush with anybody. They never did purchase and PPE. I have been shocked by 120, 208 & 277 volts. Also got shocked from oil burner transformers ( several thousand volts ) & 5,000 volt static elininators. The worst shock occurred when I was a young & dumb apprentice and listened to the electrician that it was okay to stand in 4" of cows blood while plugging in a single phase 240 volt twist lock plug. We usually wrapped damp plug & female cord connector with paper towels to plug or unplug them but it was at the end of the day and boss was in a hurry. I got got a nice big shock from one hand across my chest and out the other hand. My chest hurt rest if that day.
Forgot to add that I got shocked several times from the 665 volt DC buss from a 480 volt VFD that was just LOTO. The capacitor bank on drives can still be holding a charge up to 15 minutes after the power is removed.
We always ordered drives that had built in input fuses believe they rated for 200 KIA so when they were powered from switch boards with either a 22 or 65 KIA we were safe.
I'm currently working on a job, and I'm hearing a couple of guys argue over the subject of airgaps. One says the NFPA 70e took it out, and the other says it's company based. Could you provide me with any information to help me solve this discrepancy?
I've said it before and I'll say it again. Ryan Jackson, you sir are the absolute GREATEST electrical teacher on RU-vid or anywhere else! Deliberate and concise, with easily digestable information. You don't go off on tangents or go down vague paths like that other guy. (Name withholt) I speak for myself and my service and construction department when i thank you and encourage you to keep making these super informative and life saving videos...!! 💪💪🐐🐐🐐🐐🫡🫡🫡 Seriously the GREATEST SIR!
I enjoy your videos and been a follower since you were doing videos with Mike Holt. I'm reaching out because I am requesting if you take the time on doing a video on sealing raceways and conduits... particularly 300.7 and also please because I'm a master electrician for work for a Solar Company full-time as a master electrician. I also tend to believe that ceiling raceways on all exterior junction boxes is a good practice. I'm particularly curious about this rule because a lot of the times PV circuitry is exposed in metal or different type of raceways on roofs and they can suffer from condensation. It's not just hazardous locations but please do a nice in that video pertaining to this. I guarantee you that installers, electricians, inspectors, and Engineers probably don't even pay attention to this reference. Also please go over the methods used to achieve this because sometimes I'm not sure if silicone woodwork even though the manufacturer specifications States it works on plastic and rubber which are some of the characteristics of electrical wiring insulation.
Most companies are too doc heap to purchase a NFPA 70 book. I worked at a rich fortune 500 company that only purchased one NEC book in the 17 years that I worked there. The only reason they finally purchased a NEC book I got tired of looking all over the place for my own code books.
21:55. One could debate where item (3) really needed to be added, because it essentially corresponds to (4) because if I have a breaker with an AIC rating of 10kA, installed in an application where the available fault current is 15kA, then it's obviously not used in accordance with the listing and manufacturer's instructions.
UPS system maintenance are inherently dangerous. We had a contractor injured (possibly killed, we didn't hear) while working on a UPS routine maintenance. There was an arc flash during the UPS maintenance. Normally, a UPS circuit is always hot. Be careful, people.
