I noticed a friends's Square D panel, the
neutral and ground (from the utility company
feed) are connected to the same bar. And less
than an inch apart.
Shouldn't the ground be connected to the
separate ground bar?
Should I move the ground wire?
Mains = wire coming in from the power company.
Main disconnect = a disconnect outside the house.
(yes, I've seen these before.)
Main breaker = the breaker that shuts off power
to all the smaller breakers.
I do not call a breaker in a panel a "main
On Friday, March 4, 2016 at 9:52:48 AM UTC-5, Stormin Mormon wrote:
Just because you don't call it a "main disconnect" doesn't make you
Main disconnect <> a disconnect outside the house.
"2008 NEC Article 230.70 (A) (1)
The service disconnecting means shall be installed at a readily
accessible location either outside of a building or structure or
inside nearest the point of entrance of the service conductors."
The "breaker panel" inside the house could be a "service panel"
or a "distribution panel". If the main breaker is enclosed in that
panel and serves as the main disconnect, then the panel is a "service
panel". If the "main disconnect" is in an enclosure by itself which then
feeds another enclosure full of breakers for the individual circuits,
then the "first" enclosure is the service panel and the "second" is the distribution panel.
Review the conversation in this thread, or any other site of your choice:
(Sorry for the long link, I can not access tinyurl at this time)
On Friday, March 4, 2016 at 12:29:35 PM UTC-5, email@example.com wrote:
Not pushing back, just curious...
Do you not call it a "main disconnect" based on some official terminology or
just based on your preference? The reason I ask is this:
If I DAGS for images of Main Disconnect or images of Service Disconnect,
I get a combination of images that use either of those terms, and even a
Main Service Disconnect thrown in every now and then.
Some images come from Home Inspection sites, some come from .gov sites,
etc. There doesn't seem to be a "standard".
On Fri, 4 Mar 2016 11:04:44 -0800 (PST), DerbyDad03
The NEC refers to it as the "service disconnecting means" and that
commonly gets rounded off to service disconnect, main disconnect or
other things. As long as we understand what we are talking about it is
The main bonding jumper (the place where the neutral gets grounded)
must be in the same enclosure where the service disconnect resides.
Some AHJs have ruled that it can be anywhere in "service equipment"
and allow it in the meter can if the ground electrode conductor lands
there too. This is because most meter cans ground the neutral.
I am not sure how they justify it because 250.24(B) seems pretty
(B) Main Bonding Jumper. For a grounded system, an unspliced
main bonding jumper shall be used to connect the
equipment grounding conductor(s) and the service-disconnect
enclosure to the grounded conductor within the enclosure for
each service disconnect in accordance with 250.28.
The important thing is that the neutral does not get regrounded after
the place where the grounding electrode lands. There used to be an
exception for sub panels in another building with a grounding
electrode system but that went away during the Clinton administration.
On Fri, 4 Mar 2016 12:03:00 -0800 (PST), Uncle Monster
You only use that screw in the service disconnect enclosure. In a sub
panel you install the supplemental grounding bus and bring the
equipment grounding conductor to that (4 wire feeder)
The neutral bus remains isolated.
On Fri, 4 Mar 2016 16:56:37 -0800 (PST), Uncle Monster
The can/housing of ALL panels needs to be grounded, as does every
switch and outlet box, as well as all utility boxes. ONLY in the
"main/service disconnect" may the neutral and ground be directly
connected. The neutral bonding screw or jumper connects the neutral
buss to the case ground.
On Saturday, March 5, 2016 at 7:46:12 AM UTC-5, Stormin Mormon wrote:
to grounded? I may have the wrong vision in my head but I think I imagined
that the ground bar was in an insulated holder like the neutral bar but now
I remember the grounding bar being attached directly to the can/housing. D
rain bamage, not enough sleep. Sometimes I can't spell kat. o_O
It was answered within hours of your question, with a qualifying "if".
Since you never directly addressed the "if" it's on you.
I'll make it easy for you:
If this "if" is true, then you already have your answer:
"No if this is the service disconnect enclosure where the ground
electrode conductor lands and the main disconnect resides..."
If that "if" is not true, then you need to tell us more about
the installation. In other words, if the service disconnect is
not in the panel you are asking about, then where is it?
On Saturday, March 5, 2016 at 8:16:27 AM UTC-5, DerbyDad03 wrote:
e to grounded? I may have the wrong vision in my head but I think I imagine
d that the ground bar was in an insulated holder like the neutral bar but n
ow I remember the grounding bar being attached directly to the can/housing.
Drain bamage, not enough sleep. Sometimes I can't spell kat. o_O
IDK what he doesn't understand at this point with no additional input.
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