Meter before main swbd

[Alwayslearningelec]

Have 11 incoming sets from utility feeding main switchboard. They show a meter as you see which makes sense.
Obviously 11 sets aren't terminating at the meter but those conductors must pas though the meter I believe which seems not practical,
How would this install work? The meter and metered conductors that is. Thanks

 

[infinity]

For a 4000 amp switchboard you would use a 10 point meter pan and 4000:5 amp CT's.

 

[Dennis Alwon]

In our area the power company will dictate what size the ct cabinet will be and they supply all the ct's.

 

[Alwayslearningelec]

For a 4000 amp switchboard you would use a 10 point meter pan and 4000:5 amp CT's.

Ok, but all 11 sets terminate in the meter pan? Doubt it. Well actually each conductor does get a CT, right?

 

[Dennis Alwon]

Ok, but all 11 sets terminate in the meter pan? Doubt it. Well actually each conductor does get a CT, right?

No they terminate in the ct cabinet

 

[Dennis Alwon]

The meter usually only requires a small conductor which goes from meter to ct's

 

[Dennis Alwon]

These are CT's that go in the cabinet with service wires run thru them. The terminals on top get connected to the meter. The meter carries very little load

 

[infinity]

I would post a set photos but the forum software is not cooperating.

 

[augie47]

It's a conversation you need to have with the utility. They all have specific requirements for CT metering.
In some cases here the metering would be handled by POCO in the transformer and in some cases a CT cabinet meeting their requirements needs to be installed.

 

[Alwayslearningelec]

I would post a set photos but the forum software is not cooperating.

Please do when able to. I get What Dennis is saying but pic would help.
Essentially the 11 sets land on a CT cabinet and then exit CT cabinet to main switchboard??

 

[augie47]

Please do when able to. I get What Dennis is saying but pic would help.
Essentially the 11 sets land on a CT cabinet and then exit CT cabinet to main switchboard??

As you can see from the pictures, the CTs are like big donuts so the conductors may not "land" (as in terminate) in the CT cabinet but are simply routed through the CTs

 

[petersonra]

 

[Alwayslearningelec]

View attachment 2557162

Thanks.

 

[Dennis Alwon]

Please do when able to. I get What Dennis is saying but pic would help.
Essentially the 11 sets land on a CT cabinet and then exit CT cabinet to main switchboard??

Yes.... they can loop thru the ct or be connected to a bar depending on what is in the cabinet. In with the service and out to the panel. Small conductor from CT to the meter- we always used a 100 amp meter base but I think you need to check with the power company .

 

[infinity]

A 4000 amp service will have bus section for installation of the CT's.

 

[Alwayslearningelec]

here's a different pic of what I first posted. So separate CT cabinet that's part of the switchboard.

 

[Alwayslearningelec]

A 4000 amp service will have bus section for installation of the CT's.View attachment 2557163

So the bus runs through the CT's and not wire terms on the CT themselves?

 

[jim dungar]

So the bus runs through the CT's and not wire terms on the CT themselves?

It depends on the revenue style CTs used by the utility.

 

[infinity]

So the bus runs through the CT's and not wire terms on the CT themselves?

This is ConEd right? Look at the 4000 amp CT in post #15, that's a ConEd 4000 amp CT.

 

[infinity]

Photo editor is now working so here's a few photo's of a ConEd standard 4000 amp CT cabinet and 10 point meter pan.