This is not how you do isolated ground ....

Status
Not open for further replies.
Answer: Maybe because they only had black wire to extend those particular circuits to the so called "IG Panel". :)

JAP>
 
kwired said:
The feeder EGC lands on the EGC bus bolted directly to the cabinet. The left "neutral bus" which has all the "IG" conductors landed on it, has had it's jumper to the right neutral bus removed and is insulated from the EGC and the cabinet. All that connects to it is the "IG" conductors and the ground rod.
Click to expand...

Thus no fault clearing capabilities on the IG as Cow pointed out earlier.

JAP>
 
Everything looks normal except that 5 of the branch circuits' egc's (including the mwbc) are only connected to their own ground rod.
I'm assuming the bar they're using to connect the isolated egc's and gec used to be a neutral bar with the factory jumper removed?

I wonder why only 1 of the 8 circuits are on L2?
 
jap said:
If we're going to pick it apart why are all of the 1p breakers on A phase only?

JAP>
Click to expand...
Used to be common to require all items that have communication links between them to be on the same line or phase as well as the isolated ground. May have been some justification to both at one time. Most newer equipment doesn't matter though.
 
RAKocher said:
Everything looks normal except that 5 of the branch circuits' egc's (including the mwbc) are only connected to their own ground rod.
I'm assuming the bar they're using to connect the isolated egc's and gec used to be a neutral bar with the factory jumper removed?

I wonder why only 1 of the 8 circuits are on L2?
Click to expand...

Because that is a red and it's a 2p breaker.
I was just joking earlier about only having black wire and that's why they landed all of the "Blacks" on A phase but that seems to be exactly what they did.
Had they extended the circuits with Red wire all of the breakers would have only been place on B Phase and A would have been left empty.

JAP>
 
kwired said:
Used to be common to require all items that have communication links between them to be on the same line or phase as well as the isolated ground. May have been some justification to both at one time. Most newer equipment doesn't matter though.
Click to expand...

I agree, so we need to at least give them credit for pulling a neutral for each of the 3 circuits on the same phase. :)

JAP>
 
jap said:
Because that is a red and it's a 2p breaker.
I was just joking earlier about only having black wire and that's why they landed all of the "Blacks" on A phase but that seems to be exactly what they did.
Had they extended the circuits with Red wire all of the breakers would have only been place on B Phase and A would have been left empty.

JAP>
Click to expand...

Even though the black and red are not oriented correctly on the 2p breaker if that's what they were trying to accomplish. :)

JAP>
 
jap said:
Because that is a red and it's a 2p breaker.
I was just joking earlier about only having black wire and that's why they landed all of the "Blacks" on A phase but that seems to be exactly what they did.
Had they extended the circuits with Red wire all of the breakers would have only been place on B Phase and A would have been left empty.

JAP>
Click to expand...
What ever happened to balancing the load in that panel 1 phase has almost all load.


Sent from my SM-T350 using Tapatalk
 
Daniel malack said:
What ever happened to balancing the load in that panel 1 phase has almost all load.


Sent from my SM-T350 using Tapatalk
Click to expand...
From what I understand it is mostly POS equipment and there probably is pretty minimal load to begin with. Might even been able to put them all on just one or two breakers and never had a trip on overload.
 
jap said:
Even though the black and red are not oriented correctly on the 2p breaker if that's what they were trying to accomplish. :)

JAP>
Click to expand...
If there isn't another voltage system on the premises, there is no requirement to identify each conductor by system and phase. The feeder conductors are both the same color. The feeder neutral needs to be white or gray and not taped if it is smaller then 4 AWG, which it looks like it may be.
 
kwired said:
If there isn't another voltage system on the premises, there is no requirement to identify each conductor by system and phase. The feeder conductors are both the same color. The feeder neutral needs to be white or gray and not taped if it is smaller then 4 AWG, which it looks like it may be.
Click to expand...

It is and always has been common practice around here to see red wire being pulled for B phase even if it's a 240v single phase panel even though not required.

It's just easier to keep track of the circuits that way.

JAP>
 
And though called out to be actually orange to phase the wild leg in a 240v delta system, most generally around here it is always phased red and it's the blank spaces on every B phase in the panel where single poles are installed that tips you off to it being such.


JAP>
 
I took a closer pic of the IG bar for those that may be missing what's wrong .....

c156c2b8dea3bd200dc8a7de38b9c0e8.jpg



Sent from my iPhone using Tapatalk
 
It appears to me that the incoming wire EGC is connected to the ground bar on the right. the conduit EGC is connected to the box. So they are bonded together back at the source.

if it makes you feel better run a wire between the two ground bars.
 
This is not how you do isolated ground ....

petersonra said:
It appears to me that the incoming wire EGC is connected to the ground bar on the right. the conduit EGC is connected to the box. So they are bonded together back at the source.

if it makes you feel better run a wire between the two ground bars.
Click to expand...

No, they're not connected at all.

The IG bar is totally isolated, and goes straight to a ground rod. There is no EGC at the devices.

The steel boxes are bonded, but as the name implies, the device EGC is isolated from the yoke.

Sent from my iPhone using Tapatalk
 
petersonra said:
It appears to me that the incoming wire EGC is connected to the ground bar on the right. the conduit EGC is connected to the box. So they are bonded together back at the source.

if it makes you feel better run a wire between the two ground bars.
Click to expand...

The single GEC coming into the back of the panel and landing on the ground bar that is insulated from the panel is connected to a ground rod outside and does not have a jumper to the Ground bar that is fastened to the box.

So they are not bonded together back at the source.

That's the whole issue we've been discussing.

JAP>
 
Status
Not open for further replies.
Top