250.24 (A) (5) 2020 Graphic

[Solar Flare Luminare]

I am a little confused by the 250.24 (A) (5) Load Side Ground Connections graphic from the 2020 Ground and Bonding video at the 2:24:10 timestamp.

Is it missing an incoming ground wire?

On the final panel to the right, should there be another ground coming in from the ground rods/concrete encased electrode/etc. with it being terminated on the ground bar with the ground from the 12/2 that is terminated there?

Sorry, I cant figure out how to add the image directly here.

 

[Solar Flare Luminare]

On the final panel to the right, should there be another ground coming in from the ground rods/concrete encased electrode/etc. with it being terminated on the ground bar with the ground from the 12/2 that is terminated there?

Sorry, not to the ground rod or other grounding means, but with a ground wire ran with the phase conductors that returns to the first disconnect after the meter and is connected to a ground bar in that panel immediately after the meter. That should be there shouldn't it?

 

[Dennis Alwon]

Sorry, not to the ground rod or other grounding means, but with a ground wire ran with the phase conductors that returns to the first disconnect after the meter and is connected to a ground bar in that panel immediately after the meter. That should be there shouldn't it?

Need to see the graphic but there is no equipment grounding conductor between the meter and the first disconnect. The neutral is grounded in the meter and thus grounds the service disconnect.

 

[infinity]

Sorry, not to the ground rod or other grounding means, but with a ground wire ran with the phase conductors that returns to the first disconnect after the meter and is connected to a ground bar in that panel immediately after the meter. That should be there shouldn't it?

So you mean the conductors on the line side of the service disconnect? There is no "ground wire" on the line side of the servcie disconnect. There may be a SSBJ if there is a metal service raceway.

 

[Solar Flare Luminare]

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[Tulsa Electrician]

I am a little confused by the 250.24 (A) (5) Load Side Ground Connections graphic from the 2020 Ground and Bonding video at the 2:24:10 timestamp.

Is it missing an incoming ground wire?

On the final panel to the right, should there be another ground coming in from the ground rods/concrete encased electrode/etc.with it being terminated on the ground bar with the ground from the 12/2 that is terminated there?

Sorry, I cant figure out how to add the image directly here.

No.

 

[Tulsa Electrician]

In the picture is is showing the parrelle path if you do ground the netural on the load side of the service disconnect where the MBJ is installed. Wich is a code violation.
The yellow arrows are showing the path of unwanted current flow in normal operation.

 

[infinity]

Sent from my iPhone using Tapatalk

We're trying to help you but please don't just post a graphic with no explanation or comment. What does that graphic show in relation to your question?

 

[augie47]

The ground rod, UFER, and any grounding electrode conductors would connect at or before the service panel and not at the subpanel (right side).
From the picture it appears the subpanel (and grounding bar) are connected to the main by a metallic conduit which can serve as the required equipment ground to that panel.

 

[Solar Flare Luminare]

We're trying to help you but please don't just post a graphic with no explanation or comment. What does that graphic show in relation to your question?

The introduction paragraph has the question


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[don_resqcapt19]

The introduction paragraph has the question


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and the answer is no

 

[Solar Flare Luminare]

The ground rod, UFER, and any grounding electrode conductors would connect at or before the service panel and not at the subpanel (right side).
From the picture it appears the subpanel (and grounding bar) are connected to the main by a metallic conduit which can serve as the required equipment ground to that panel.

Oh! Right! I totally forgot the raceway can serve as the grounding conductor! Thank you so much!

 

[Solar Flare Luminare]

Suppose that the raceway was pvc, would you need a ground going to the panel furthest right then?

 

[infinity]

Suppose that the raceway was pvc, would you need a ground going to the panel furthest right then?

The conductors between the service disconnect and the panel is a feeder. A feeder would require an EGC. Can be a metal raceway if it qualifies as an EGC.

 

[Tulsa Electrician]

Suppose that the raceway was pvc, would you need a ground going to the panel furthest right then?

The term EGC ( equipment grounding conductor) would be used. If PVC was used between the service disconnect enclosure and the panel to the right. In that case it would a wire type EGC.
Have a look at 250.118
Practice using the correct term.
It will help guide you through artical 250.


Keep in mind that green screw ( MBJ/SBJ) in the panel to the right of the picture is gone. Has to be removed. If not then the EGC ( wire type) will be a parallel path for current to flow under normal operating conditions just like the raceway would. Points for using the term raceway.

If the raceway between the meter and the service disconnect enclosure was PVC nothing would be done. Nothing added since the MBJ and GEC are in that enclosure.