Yes, there is safety concern if you have more than one bond. Equipment ground is connected to the frame of every appliance in the home, so you want only emergency (fault) voltage and current on that side. It's what consumers touch, so you want the equipment ground pathway back to transformer along the ground system to be entirely resistance free. If there is resistance on the line somewhere downstream, and if the neutral current is allowed to jump over to the ground side at an incorrect subpanel bond, you'll get enough voltage on all those appliance frames to cause a shock hazard, everywhere. In our TNC-S system the ground and neutral share the same wire back to transformer at service entrance, so you want the singular bond between the two to be at only one place where service entrance meets the main panel.
CORRECTLY SAID I think in all my years of working with current, I never heard that statement about . We separate all our conductors in boxes, fixtures nd circuts . Why would you not in your subpanel ? Well said sir , nd I’m going to use this analogy going forward. Knew I liked this channel from the first time I saw it . Going on a few weeks now . Going to share it with a few of my colleagues at work . Much appreciation for all your contributions, editing , nd knowledge …
Old detach building can be under a different of rules. It must be fed with two hot a neutral and a ground to remove that bonding screw so a 4 wire feed...
I just discovered your channel, so I haven’t had the chance to look at the rest of your videos, but have you covered what happens to the neutral feeder when there are balanced loads in the electrical system? Such as if you had a second hot plate in your demonstration that pulled the same amount of current as the first one? This, I believe, would be a valuable learning demonstration for new apprentices.
If you do not isolate the grounds and neutrals inside of a sub panel you can shock yourself just by touching the sub panel. A lot of people forget that the white neutral wire is a conductor so if you bond it after the MSP you are adding voltage to the ground and the sub panel is grounded meaning if you touch it it can transfer through to you.
Thank you I've been asking that question for a long time and never could get an answer that I can understand correctly that makes all the sense that's all they ever had to say every path proportionate to the load that explains a lot
Places wired in the '80s all wired "wrong" there has been no electrocutions, have we been unusually lucky? Should I run a separate ground which back then everything was direct bury (no conduit) ??? I am on a farm with 4 barns all with 3 wire 2 110v legs and a neutral & grounds to earth from their boxes. Are you guys saying the 7amps is getting back to the main through the ground (earth)?
The danger created is call objectionable current. If left alone and done right its hard to hurt ppl but can be fatal if working on it even if the power is off where you are working. Separate grounds and neutral remove the hazard completely. Have you ever seen the videos of drain pipes sparking? That is caused by not separating grounds and neutrals. It was always a code violation to not separate them even back in the 40s. The two exception used to be the first panel in a detached building (changed in 2008) and stoves and dryers(changed in 1996). I have a old code book collection back to 1940...
@@Stevenj120volts badass man. I'm a Texas Journeyman myself. What you're doing is meaningful and you're helping green guys you don't even know. #respect
I never do my own electrical work not because I cant or don't want to its that I'm not getting paid and most days I've had enough of electrical work by the time I get home. 😄😄@@gregfazenbaker6033
