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400 Amp Meter Main 1969

507 Views 6 Replies 5 Participants Last post by  SWDweller
Hi, please look at the two pictures. I think this is a 400 amp meter main. There are 4 Federal Pacific 100 amp disconnect switches in the garage, directly behind this meter main, which provides the disconnect for this equipment.
What is the yellow device in the middle of the picture? What is the u-shaped equipment that connects the left side line side to the load side bus? The right side of the equipment it appears the line side bus and load side bus are not connected. I think the #12 conductors tapped off of the bus is for the meter, which leads me to think this yellow device is some sort of current or voltage transformer, however it does not look like a transformer. Please help with determining how this equipment operates. Would removing the meter de-energize the load side? See pics. Thank you.

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To follow up with the description, I was not able to test the equipment with my digital multi-meter because I did not have proper PPE, however there is power to the house it serves. There was no nameplate or sticker on this panel to indicate the make and model.
 

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I have no idea what that is but I am sure someone on this forum has run into it. Are you on the west coast?
 

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The yellow thing is the CT for measuring one phase.

Incoming wire is mighty small for 400 amps.

Are you sure there is 240v inside? It does not look like the right side is continuous (?)

Pulling the meter has no effect on the power. Your looking at an old Meter CT cabinet.

No I have not see one exactly like this. Better verify the fault current before you go very far.
 

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Only one way to verify- open that secondary. No don't . I'm joking. What you should do here is call the poco to cut power to the building while you install a new service and bring it up to date. Get rid of the FPE equipment while you are at it. I think it is a 200 amp service , go outside and look at the wire from the poco.
 

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Thank you for your replies. This meter-main is located in Sonoma, CA. The load side conductors are pretty big maybe as large as 400 MCM, I could not read the cloth insulation and they are old. There are 4 100 amp Federal Pacific disconnects and 1 old 100 amp square d disconnect in garage. The large sub feeders and these 5 disconnects led me to believe it’s a 300 or 400 amp service.
I have no idea what that is but I am sure someone on this forum has run into it. Are you on the west coast?
Sonoma, CA
 
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