thanks coach for the advice on good note is to take the time do it right the first time as my lead guy would always tell me on every job when i was in training keep the good fight going coach
One time I felt a barely noticeable shock from a piece of tie wire used to hold up ceiling grids. My foreman thought I was lying since nothing was energized yet, but you never know. My best guess was that someone was using their own generator to power a plug in power tool and the insulation on the cord got damaged and the exposed wires were contacting the structure of the building.
There is a different level of skills required in doing say a new installation vs coming out to a really old building with some hacked up electrical. You need to know how to use your meter properly so you can determine if something is safe to touch. Should have at least two meters imo so you can check them against each other. Every electrical tinkerer must never stop learning, and take care of mind/body to be as alert as possible.
One more fun fact. I was browsing through the submittal that my company sent to the GC and looked at a regular switch you would have in your house and the document said it was rated for 1,000,000 switches. Thought that was hilarious
That rule is general. You need bonding bushings when using eccentric or concentric knockouts. And for 480V/277V systems, you cannot use a knockout period (even if it is not concentric or eccentric) unless the box is marked as suitable for use as a bond. There will be a stamped marking on the inside of the box if that is the case.
most "newbies" don't learn.. they make a dollar hr wage and don't care... hard to manage w/o proper supervision from all uppers... work with your people to save lives.... been there. lived thru it- so fae
I get why we want those screws tight, but it would seem, short of the pipe actually seperating from the couplings, there is way more metal touching than there is with a set screw, it should trip. Unless, like I said, the pipe was not touching the couplings. Not arguing against tight screws, just saying, there is still 99.95 of the conduit touching.
I really don't know why anyone thought this was a good idea outside of undercutting the competition in price to not have to run another string of copper. Should be against code. Our electrical code is extremely outdated, especially when it comes to EV charger installs.
It might be Code, but code is the minimum. I would rather be safe and pull the green.
Klein makes screw drivers made for set screws and they're the best. flatheads always slip off
thanks coach for the advice on good note is to take the time do it right the first time as my lead guy would always tell me on every job when i was in training keep the good fight going coach
EMT for the equipment ground.
New information to us.
Good advice as always. Thank you for the “heads up” related to reconnecting the loose EMT connections.
Fantastic information,
Very well presented.
Excellent example very important
One time I felt a barely noticeable shock from a piece of tie wire used to hold up ceiling grids. My foreman thought I was lying since nothing was energized yet, but you never know. My best guess was that someone was using their own generator to power a plug in power tool and the insulation on the cord got damaged and the exposed wires were contacting the structure of the building.
There is a different level of skills required in doing say a new installation vs coming out to a really old building with some hacked up electrical. You need to know how to use your meter properly so you can determine if something is safe to touch. Should have at least two meters imo so you can check them against each other. Every electrical tinkerer must never stop learning, and take care of mind/body to be as alert as possible.
One more fun fact. I was browsing through the submittal that my company sent to the GC and looked at a regular switch you would have in your house and the document said it was rated for 1,000,000 switches. Thought that was hilarious
Great video as always
Not everywhere, local codes prevails over national code
So when you don’t run a ground wire the pipe is it just connected to the connectors?
Let’s get to it fighting the good fight
Is there a rule about EMT bonding and concentric knock outs?
That rule is general. You need bonding bushings when using eccentric or concentric knockouts. And for 480V/277V systems, you cannot use a knockout period (even if it is not concentric or eccentric) unless the box is marked as suitable for use as a bond. There will be a stamped marking on the inside of the box if that is the case.
In your emt graphic you have a gfci, wouldnt the gfci still trip.
most "newbies" don't learn.. they make a dollar hr wage and don't care...
hard to manage w/o proper supervision from all uppers...
work with your people to save lives.... been there. lived thru it- so fae
I just took out some EMT and was thinking I'm just going to put a board up to protect the wires. Later learned there were no ground wires.
Here in Chicago that's all we deal with. No Romex here
I get why we want those screws tight, but it would seem, short of the pipe actually seperating from the couplings, there is way more metal touching than there is with a set screw, it should trip. Unless, like I said, the pipe was not touching the couplings. Not arguing against tight screws, just saying, there is still 99.95 of the conduit touching.
You are correct, but if it's not tight enough it will not offer enough resistance and it will remain energized or worse.
Touching is not enough. It has to have a low enough impedance.
Sometime we touch the live wire intentionaly if the wire has power hehe human tester
you had me reeled as always...
appreciate you...
but at the last 20 sec you said Idk.
it felt out of your element.. fmo
Not in cali
I really don't know why anyone thought this was a good idea outside of undercutting the competition in price to not have to run another string of copper. Should be against code. Our electrical code is extremely outdated, especially when it comes to EV charger installs.