mjf
Senior Member
Anyway to tell for sure what a jumper bar in an old meterbank is rated at?
Jumper bar
- Thread starter mjf
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kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
mjf
Senior Member
they go from load side of meter to line side of main disconnect.....Breaker snaps right on to jumper bars.
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
mjf
Senior Member
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Well I would guess that they are 125 amp rated if typical plug on miniature circuit breakers is what is used, but there is some chance they could be limited to 100 amps. Is not likely they are limited to any less than 100 as there would not be as much demand for one designed for less than 100.
Is there manufacturer and model information available, that would be a big help.
mjf
Senior Member
All I know is it's a zinsco (yeah, I know) 6 meter/main unit from the 50's or 60's. There are presently 6 40amp main disconnects and one owner is looking to upgrade.
I can get a breaker, just need to know for sure if the jumper bar has acceptable rating.
Maybe I'll check the other sevices at this complex to see if I can find a rating label.
fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
Zinsco breakers! They need to be rated 1 gigaAmp:happyyes:
kwired
Electron manager
- Location
- NE Nebraska
- Occupation
- EC
Could just use one of those molded case switches that plugs onto panel bus and is a switch only - no overcurrent protection. You would still have a disconnecting means - and would also have similar overcurrent protection:happyyes:
mjf
Senior Member
found a label in an identical piece of equipment.
Zinsco Cat# MTML 22-ST
It did list which zinsco type breakers were ok to use, but unfortunately nothing about maximum OCP.
At this point, I'm leaning towards just running a seperate drop to a new meter pan/main disconnect.
Thanks for your effort.
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