Question about a zinsco service panel

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Old 02-14-12, 10:11 PM
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Question about a zinsco service panel

Can you run a modern 100 amp sub panel (going to detached garage/shed) to a 100 amp zinsco style service panel?

And do you need a certain breaker to do so or will a 100amp double pole breaker work and just wire to sub panel

Also do you have to use a 2 pole breaker for a sub panel or will a single poll work also?
 
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Old 02-15-12, 07:41 AM
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Zinsco breaker boxes haven't been made for three or four decades and are considered a potential fire hazard. You would have to find a Zinsco after market 100 amp breaker. That would cost you more then $100. Of course in some cases a panel is not rated to handle a branch circuit breaker as large as the main breaker. I'm not sure on a Zinsco box. You may want to consider having your Zinsco box replaced. Is My Electrical Panel Safe? - Important Information About Federal Pacific Electric, Zinsco and Outdated Electric Panel Boxes

What loads do you have at the shed that warrant a 100 amp feed. Even with compressors and welders 60 amp is often enough.
 
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Old 02-15-12, 06:18 PM
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Can you run a modern 100 amp sub panel (going to detached garage/shed) to a 100 amp zinsco style service panel?
Yes, you can, but I wouldn't. First of all, I would assume your intent is not to run a full 100 amps to the subpanel. I would also assume that even with limited electrical knowledge you would understand that you could probably only safely provide 30 or 40 amps MAX to the subpanel with only a 100 amp main panel. Now, if money is an issue, I'd first put my money on replacing that fire hazard of a panel you have with that Zinsco. Yes, you can purchase breakers to fit an obsolete Zinsco, but they are expensive. A better use of your money would be to apply it to a service panel change to a good copper bus panel and then look at installing a subpanel in your garage. Here is some more info on Zinsco for you to review. You can't make good decisions without good information.

Zinsco Sylvania Kearney Electrical Panel and Circuit Breaker Hazards, Failures, Inspection, Detection, Repair, Replacement - Sylvania Zinsco circuit breakers and panel hazards
 
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Old 02-16-12, 06:27 PM
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Yes I was only planning on getting 30-40 amps out there and I have certainly looked into changing out the zinsco or at least doing one of those retro fit jobs... This is all still in planning stages now not ready to pull the trigger on anything I'm just trying to lay all of my options out get some quotes and look things over. I do agree that in the near future the zinsco has to go I don't feel safe with that service panel. Thank you for your input and the links you have been most helpful.
 
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