Neutral & ground

[m sleem]

In NEC do we need to connect the neutral wire with ground inside the same panel ?

 

[Strathead]

In NEC do we need to connect the neutral wire with ground inside the same panel ?

Please read Article 250 in its entirety, then if you have a question feel free to ask it with code reference. Without trying to offend, this question seems like an accountant asking an electrical question. I think that is why you have gotten 30 views and no responses.

 

[don_resqcapt19]

The neutral is connected to the grounding conductor(s) at only one location.

 

[Hendrix]

In NEC do we need to connect the neutral wire with ground inside the same panel ?

hmy:hmy:

 

[templdl]

The neutral is connected to the grounding conductor(s) at only one location.

And to do otherwise would allow the EGC to share the neutral current. That's what people just don't understand as a big no no. The integrity of the neutral must be protected maintained even though it is a most commonly the grounded conductor. Just because it is a grounded conductor doesn't mean that you free to reground it again at your will.

 

[resistance]

hmy:hmy:

Those face expressions are not allowed……use these instead: :roll::?

 

[m sleem]

The neutral is connected to the grounding conductor(s) at only one location.

From the below fig. i can understand the neutral is grounded only at the transforemer




thanks for all..

:thumbsup:

 

[K_Buz]

You might want to look at those diagrams again.

 

[fmtjfw]

When you talk about the transformer (which probably belongs to the power company) and the service disconnect which belongs to the user you find that you are crossing a boundary. Between the transformer and the service disconnect you cross between the National Electric Safety Code (applies to the power company) and the NEC (applies to everything else).

What the power company does with their neutral in the transformer does not change the requirements of the NEC.

See the articles on service entrances and on grounding.

good luck,

/s/ Jim WIlliams

[Yes I know I'm glossing over some corner cases]:huh:

 

[m sleem]

The neutral is connected to the grounding conductor(s) at only one location.

Don, i think NEC is agreed with the TN-S system.......please correct me:slaphead:..!!!
..

1.1 TN-S system earthing​

A TN-S system, has the neutral of the source of energyconnected with earth at one point only, at or as near as is reasonablypracticable to the source, and the consumer?s earthing terminal is typicallyconnected to the metallic sheath or armour of the distributor?s service cable into the premises.

​

 

[meternerd]

In NEC do we need to connect the neutral wire with ground inside the same panel ?

Reading the 250 section is one thing....understanding it is something else again. The short answer to your question is...sometimes. In most cases, the neutral and ground are connected together ONLY at the service disconnect. That's where the utility and the customer meet. When you get into separately derived systems and the like, it gets a bit more confusing.

 

[don_resqcapt19]

Don, i think NEC is agreed with the TN-S system.......please correct me:slaphead:..!!!

With a utility supplied grounded system, there will be two points of connection. One at the utility transformer and the second at the service disconnect. With a Separately Derived System (most common is a transformer) their will only be on point of connection, either at the transformer or at the first disconnect.