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Old 01-07-2012, 11:59 PM   #1
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Wiring a sub panel


I am under the impression that at ANY time after the main panel in a home you must separate your grounds and neutrals. Is this correct? The reason I ask is because I watched a youtube video recently about a guy remodeling a house and running a sub panel to the second story of the home. He said to connect the ground to the neutral lug. I always thought if the panel did not contain a ground bar with it you must buy it separately so you could basically be using a 4 wire feeder cable. The guy in the video stated he was not going to use the bonding screw so it kind of has confused me as to what is correct. Furthermore, what is the exact way to apply this concept in a main panel setting after the meter? Basically I am asking when to use 3 or 4 wire cable and how would you go about grounding in both situation with the ground rod. Thanks for any help!

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Old 01-08-2012, 12:02 AM   #2
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Wiring a sub panel


It was you-tube

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Old 01-08-2012, 12:09 AM   #3
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Wiring a sub panel


Yes, I am fully aware of the lack of knowledge on youtube but the guy was saying some factual statements and he seemed sure of what he was doing and was prepared to have it inspected so I wanted to double check my own thoughts on the matter.
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Old 01-08-2012, 12:11 AM   #4
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Wiring a sub panel


He only SEEMED sure of what he was doing.....actually maybe HE was sure, but he was also wrong.
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Old 01-08-2012, 09:51 AM   #5
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Wiring a sub panel


You can do a search on this forum for sub-panels and get a wealth of information. It’s probably one of the most previously discussed topics.

To shed some light on your question, the main service disconnect is the ONLY place a connection between neutral and ground is made, barring a few exceptions allowed for existing installations. New installations of sub-panels require 4 wires, and the neutrals and grounds are kept separate. A ground wire in a 4-wire feeder is an equipment grounding conductor, not a grounding electrode conductor.

Ground rods for sub-panels are only required if the sub-panel is installed in a detached building. A sub-panel installed in the same building as the main disconnect doesn’t require additional grounding electrodes.
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Old 01-08-2012, 01:35 PM   #6
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Wiring a sub panel


Did someone add a comment to the Youtube video stating that connecting the ground to the neutral was wrong?
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Old 01-08-2012, 03:00 PM   #7
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Wiring a sub panel


So exactly how did he connect it? He ran a 4-wire feeder, terminating ground and neutral both on the same isolated terminal bar, and without the bonding screw installed? That's definitely not right. That makes the chassis of the panel ungrounded.

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