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Old 05-19-2012, 05:26 PM   #1
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What vintage is this fuse circuit breaker ?

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I just left this CG in Carlsbad NM and had a 50 amp site with this fuse a a circuit breaker I've never seen one of these in all my travels. I once had a site with 15 amps and they had screw in glass fuses.
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Old 05-19-2012, 06:12 PM   #2
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That looks like the fuse used on our 220VAC electric water heater. If you install it right side up it's on and upside down it's off.
I have also seen that kind of fuse used on 220 VAC Air Conditioners.

There is no reason it couldn't be used for a 50 Amp service in a RV park except when it blows it costs money to replace the fuse instead of just resetting the breaker. One fuse is required for each 115 VAC leg of the 50 AMP service.

Dick
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Old 05-19-2012, 06:19 PM   #3
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That is the same as we use in our A/C units it is made by midwest
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Old 05-19-2012, 06:23 PM   #4
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Quote:
Originally Posted by Theberrys
That looks like the fuse used on our 220VAC electric water heater. If you install it right side up it's on and upside down it's off.
I have also seen that kind of fuse used on 220 VAC Air Conditioners.

There is no reason it couldn't be used for a 50 Amp service in a RV park except when it blows it costs money to replace the fuse instead of just resetting the breaker. One fuse is required for each 115 VAC leg of the 50 AMP service.

Dick
Thanks Dick. That all sounds feasible to me
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Old 05-19-2012, 06:32 PM   #5
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That's a cartridge fuse. They do the same as a circuit breaker, except when you blow it, it's about $5-10 to replace it. (retail) In a campground, I can't believe they haven't upgraded to circuit breakers just for the savings! I'm not sure of the vintage, I know the name for the round screw in fuses are called Edison fuses!
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Old 05-19-2012, 06:34 PM   #6
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Not if you cut a piece of copper tubing to fit.
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Old 05-19-2012, 06:37 PM   #7
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Yeah, a penny works in an Edison fuse socket, but not the safest way to deal with it. That's why I'm surprised a campground could even get away with fuses. Too easy to bypass if you blow it and the office is closed.
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Old 05-19-2012, 07:16 PM   #8
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By the way, the power sucked. I was down to 106 amps yesterday. We left a day early and got a refund for the early departure. To be fair it was 96 degrees. But for $42 , I expect to be able to run my stuff.
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Old 05-19-2012, 07:26 PM   #9
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I hope you mean 106 volts! That many amps would over power 2 50 AMP RVs!
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Old 05-19-2012, 07:48 PM   #10
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Quote:
Originally Posted by BFlinn181
I hope you mean 106 volts! That many amps would over power 2 50 AMP RVs!
You are correct sir. It's happy hour here.
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Old 05-19-2012, 08:25 PM   #11
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To actually answer your question:
Those fuse holders came into common use in the late forties and were very common in residential service until the early sixties when circuit breakers became less expensive to install.

It does surprise me to see it in a 50amp RV service because that came enough later that I would have thought that breakers would have been cheaper by then, but local codes may have held them back. That happened in many places in the country.

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Old 05-19-2012, 10:37 PM   #12
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I had an electrician tell me I have never seen a fuse not blow but I have seen a breaker not trip.
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Old 05-19-2012, 10:45 PM   #13
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Fuses blow more quickly than circuit breakers, but I still like the convenience of resetting a breaker than pulling a holder, prying out the blown fuse, and installing a new one.
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Old 05-20-2012, 12:17 PM   #14
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In the 60s and 70s this type of pedestal was very common in trailer parks because that's what most mobile homes had for power (50 or 60 amp) so I'm guessing that maybe that park is a old mobile home park or they used some equipment left over from a mobile home park either way old fuse blocks clips can be a big problem . Parks that old are very rarely wired heavy enough to handle the load requirement that newer RVs. Some of your house A/C units used that type of fuse block because the A/C equipment wasn't rated for circuit breaker for over current protection.

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