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Old 09-27-2015, 08:57 AM   #21
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Originally Posted by davel1971 View Post
sure does. If it works everywhere he plugs in except "right there", then that narrows it down to "right there.
He said he just added his adapter and plugged into the 50 amp receptacle at the same pedestal. The 30 amp was popping and typically the breaker should pop at approximately 40.5 amps (135% or there abouts). That would not be enough to pop the 50 amp breaker.
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Old 09-27-2015, 08:58 AM   #22
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PS - if you are looking for a great used 5th wheel, check out my ad in the classifieds () Shameless plug.
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Old 09-27-2015, 09:20 AM   #23
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still only have 30 amps. Now you will just trip the inside breaker instead of the outside one, which is more likely to be aged and weak.
You're right.

I was thinking of an experience I had where the breaker was tripping at the parks power box. They had 20, 30 and 50 amp connections on the box and it would trip when I was on the 30 amp plug. I got a 30 to 50 amp pigtail and plugged up to the 50 amp. No more tripped breaker with the elec hot water on. I was still testing things out then...

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Old 09-27-2015, 09:29 AM   #24
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Thanks for the replies...I have the dog bone and will move up to the 50 amp where available. It sounds like that is cleaner power.
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Old 09-27-2015, 10:07 AM   #25
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Thanks for the replies...I have the dog bone and will move up to the 50 amp where available. It sounds like that is cleaner power.
Very confused

The power will be no "cleaner" than the socket right next to it.
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Old 09-27-2015, 12:18 PM   #26
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But the socket may well be cleaner and tighter because fewer people have 50A requirements and thus the 50A socket on the pole probably sees fewer insertions per year than the 30A.
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Old 09-27-2015, 12:28 PM   #27
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Very confused

The power will be no "cleaner" than the socket right next to it.
I think he meant as Dave said below you. Just bad terminology.... And yes that was a shameless plug. But good....
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Old 09-27-2015, 01:00 PM   #28
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He said he just added his adapter and plugged into the 50 amp receptacle at the same pedestal. The 30 amp was popping and typically the breaker should pop at approximately 40.5 amps (135% or there abouts). That would not be enough to pop the 50 amp breaker.
Can I ask where you got this information that my 30 amp trailer breaker will not open until I'm pulling 40.5 amps? God forbid if that is true. My whole trailer would probably catch on fire.
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Old 09-27-2015, 02:55 PM   #29
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More than anyone will ever care to know about AC Circuit Breakers is here:

https://www.industry.usa.siemens.com...t_breakers.pdf

On page 26 you will see something called the Time-Current Curve.

It is rated in seconds per l(n) where l is the breaker rating and the (n) is the number of MULTIPLES of that rating. The more multiples of the rating the faster the trip.

For example a 30 amp breaker will never trip with a continuous current of 30 amps.
At 120 amps l(4) the breaker will open in 1 second.

On page 27, smaller overloads and the time to trip can be determined.

At 45 amps l(1.5) it will take 1000 seconds (almost 17 minutes) to trip.

On page 28 they use l(1.25) as an example of the overload required to trip at the 10,000 second point.

At 1.25 times a 30 amp breaker = 37.5 amps and it will take 2 hours and 45 minutes to trip the breaker. Long enough to do serious damage to your cord's connections.

And that my friends is the real story.
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Old 09-27-2015, 02:58 PM   #30
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Quote:
Originally Posted by Herk7769 View Post
More than anyone will ever care to know about AC Circuit Breakers is here:

https://www.industry.usa.siemens.com...t_breakers.pdf

On page 26 you will see something called the Time-Current Curve.

It is rated in seconds per l(n) where l is the breaker rating and the (n) is the number of MULTIPLES of that rating. The more multiples of the rating the faster the trip.

For example a 30 amp breaker will never trip with a continuous current of 30 amps. At 120 amps l(4) the breaker will open in 1 second.

On page 27, smaller overloads and the time to trip can be determined.

At 45 amps l(1.5) it will take 1000 seconds to trip.

And that my friends is the real story.
To add. Ambient heat from it being 90 degrees outside and adjacent breakers causing heat will cause the main 30 amp breaker to blow, I had that happen first hand in Nashville this summer.
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