Reality Check...

[1793]

I need a Reality Check...

If you keep seeing things that are wrong or incorrect you start to question what you know to be correct.

In the past few weeks I've run across two "subpanels" that were wired like the one in the photo. In each incident the panels were in the same structure as the Main panel.

Is it just me or does this panel violate 250.24(A)(5)

 

[augie47]

Not just you.
It appears to be a violation of 250.24(A)(5).
In addition, in order to correct the neutrals and equipment grounds would have to swap bars and, if I am not mistaken, the feeder might be URD (based on the yellow stripe)

 

[1793]

Not just you.
It appears to be a violation of 250.24(A)(5).
In addition, in order to correct the neutrals and equipment grounds would have to swap bars and, if I am not mistaken, the feeder might be URD (based on the yellow stripe)

It does look like URD and if you look closely at the top of the "bar" on the right you will see a bare #10 CU landed there coming in with the "AL" feeder. I have not had a chance to open the LB outside to see what they have done.

 

[kwired]

It does look like URD and if you look closely at the top of the "bar" on the right you will see a bare #10 CU landed there coming in with the "AL" feeder. I have not had a chance to open the LB outside to see what they have done.

URD is not a problem as long as the conductors also have a marked rating of RHW or RHH or something like that. The #10CU may be too small for EGC. What is feeder OCP size?

 

[1793]

URD is not a problem as long as the conductors also have a marked rating of RHW or RHH or something like that. The #10CU may be too small for EGC. What is feeder OCP size?

While I don't have a problem with using URD, I have in the past, I question the #10CU. The markings on the "subpanel" list 100A.

I'm going to wait to see what the Inspector has to say when they come to look at my work.

 

[kwired]

While I don't have a problem with using URD, I have in the past, I question the #10CU. The markings on the "subpanel" list 100A.

I'm going to wait to see what the Inspector has to say when they come to look at my work.

Marking on subpanel means that is maximum rating. You can feed it with less than that, that is why I ask what is feeder OCP? If it is 60 amp or less 10 AWG copper may be acceptable. Now we have to increase EGC if circuit conductors are increased in size for any reason so that has to be considered also.

 

[1793]

Marking on subpanel means that is maximum rating. You can feed it with less than that, that is why I ask what is feeder OCP? If it is 60 amp or less 10 AWG copper may be acceptable. Now we have to increase EGC if circuit conductors are increased in size for any reason so that has to be considered also.

Markings on this panel are hand written. I have not yet seen the main panel where the feed come from.

 

[kwired]

Markings on this panel are hand written. I have not yet seen the main panel where the feed come from.

Since when were we allowed to field mark the max rating of panelboards:?

 

[1793]

Since when were we allowed to field mark the max rating of panelboards:?

After I posted my reply I thought I should have use "LABELED" 100A, hand written.