120volt meters?

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GerryB

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woodbridge, ct. USA
I have never seen this before but in this apartment building which is a 3 story brick building with 30 units there are some 120 volt meters. They actually have only 200 amps overall coming in. Then it distributes to different areas like where I was working with a disconnect and a bank of 6 meters. Four of them were newer in their own meter socket, 240 volt. The other two were the old style meter above the fused disconnect, 120 volt. The neutral was also fused. Every thing comes off a trough. There is only 30 amps to each apartment, a four fuse box in each apartment, (and the feed to each apartment is 12-3 bx, don't know how they got away with that.). The job is to upgrade each apt to 60 amps and circuit breakers for the future (next summer) expansion or some basement apartments and service upgrade probably to 1200amps. My question is if I run the 60 amps to the current locations can I splice these in the future when the new service will probably have all the meters in one location?
 
ABOUT THE METERS....there are two kinds of single phase meters that are 120V. Form 1S, 4 jaw (top jaw left hot, right neutral) are usually 100A and form 12S, 5 jaw (208 on to jaws, 120v from each top jaw to fifth jaw are usually 200A. Form 1S meters (one leg of 240V and neutral) are pretty much old school. Not used anywhere for new services I know of. 12S meters are used on 120/208 banks where any two phases and neutral give you single phase 208/120V. Neutral should not be fused.
 
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meternerd said:
ABOUT THE METERS....there are two kinds of single phase meters that are 120V. Form 1S, 4 jaw (top jaw left hot, right neutral) are usually 100A and form 12S, 5 jaw (208 on to jaws, 120v from each top jaw to fifth jaw are usually 200A. Form 1S meters (one leg of 240V and neutral) are pretty much old school. Not used anywhere for new services I know of. 12S meters are used on 120/208 banks where any two phases and neutral give you single phase 208/120V. Neutral should not be fused.
Click to expand...
They were 4 jaw, I couldn't pull the meter because it had a lock on it, but removing the grey wiring cover you had on the four terminals left to right line-neutral-neutral-load. Then the load hot and neutral each went to a 30 amp fuse block.
 
GerryB said:
They were 4 jaw, I couldn't pull the meter because it had a lock on it, but removing the grey wiring cover you had on the four terminals left to right line-neutral-neutral-load. Then the load hot and neutral each went to a 30 amp fuse block.
Click to expand...

If you were wiring maybe around 75+ years ago this may be something you commonly saw on a somewhat daily basis.
 
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