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 > marginal park power on hot days

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valhalla360

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Posted: 07/03/20 03:56pm Link  |  Quote  |  Print  |  Notify Moderator

dockmasterdave wrote:

We have a Hughes autoformer. If the voltage drops it kicks on and boosts my voltage back up to @120. I might only get 28 amps instead of 30 but my appliances are safe and my whole TT works.


That's our first line of defense...Even with the Hughes, we were dropping below 106v this afternoon, which implies the pedestal is running about 96v.

About an hour ago, we switched over to the Yamaha 2400w. Air/Con is doing fine and we are running a steady 118v.

There are probably 8-10 generators running around camp right now.


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wanderingaimlessly

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Posted: 07/03/20 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

And think how much better it will be when 30% or more of the folks in there are trying to charge their electric tow vehicles.

CavemanCharlie

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Posted: 07/03/20 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

My Travel Trailer has a 30 amp plug. I've had good luck at some campgrounds by buying a 50 amp to 30 amp cheater plug and plugging into the 50 amp receptacle.

I almost always keep the power converter shut off, (I charge my batteries at home before I leave), I run the fridge on propane, and my water heater only has propane.

I am just a weekend camper so I am never out camping for more then a few days.

time2roll

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Posted: 07/03/20 05:09pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingaimlessly wrote:

And think how much better it will be when 30% or more of the folks in there are trying to charge their electric tow vehicles.
You mean pulling 20 amps off a 50 amp connector from midnight to 7AM?


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wanderingaimlessly

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Posted: 07/03/20 05:32pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

wanderingaimlessly wrote:

And think how much better it will be when 30% or more of the folks in there are trying to charge their electric tow vehicles.
You mean pulling 20 amps off a 50 amp connector from midnight to 7AM?

Do you really think they will go out at midnight to connect?
They will start connecting as soon as they arrive and then complain that their AC isn't working, anything but admit it's their own doing.

afidel

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Posted: 07/03/20 05:34pm Link  |  Quote  |  Print  |  Notify Moderator

The vehicle will probably be programmed to start charging then since that's when they'll charge at home, it's not like as soon as you plug in they start pulling max current.


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BB_TX

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Posted: 07/03/20 05:37pm Link  |  Quote  |  Print  |  Notify Moderator

CavemanCharlie wrote:

My Travel Trailer has a 30 amp plug. I've had good luck at some campgrounds by buying a 50 amp to 30 amp cheater plug and plugging into the 50 amp receptacle.
..........


That’s not a cheater. Simply a 50 to 30 adapter. Many 30 amp people do that as the 50 amp receptacle is often better.

Lynnmor

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Posted: 07/03/20 06:12pm Link  |  Quote  |  Print  |  Notify Moderator

The voltage will be the same at both the 50 & 30 amp receptacles.





time2roll

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Posted: 07/03/20 06:38pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingaimlessly wrote:

time2roll wrote:

wanderingaimlessly wrote:

And think how much better it will be when 30% or more of the folks in there are trying to charge their electric tow vehicles.
You mean pulling 20 amps off a 50 amp connector from midnight to 7AM?

Do you really think they will go out at midnight to connect?
They will start connecting as soon as they arrive and then complain that their AC isn't working, anything but admit it's their own doing.
Car has a timer. Will be sound asleep.

CA Traveler

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Posted: 07/03/20 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

Gdetrailer wrote:

CA Traveler wrote:

CGs like houses are usually wired to supply about 40-50% of the pedestals amp rating. Hence every summer low voltage is common with lots of A/Cs running.

In my experienc 50A pedestals are not likely to have low voltage due to better wiring and 12000W rating vs 3600W for 30A.


????

No, not true that CGs like "houses" are wired to supply 40%-50% of the service rating.

If it was there would be many more service entrance wiring fires.
Actually, the NEC code allows for derating factor and that is common. And the panels main CB would trip to provide protection from overloading and fire.

Here are 2 examples:

My 2006 house built to code has a 200A panel or 48,000VA max and of course the main CB would trip if either leg exceeds 200A. Adding all of the single and dual CBs in the house panel yields 97,000VA or 51% derating..

In 2007 I was in a new CG that had a 100,000VA transformer supplying 18 50A sites. The sites totaled 216,000VA or 54% derating. Another view is that the sites are limited to an average of [email protected] not 50A or [email protected] not 100A.

My house has never tripped the main CB and I’m confident that the CG has never had 18 50A rigs averaging more than [email protected] Otherwise it would be extremely and wasteful and costly for everything from the utility to the transformer to supply 100% of the power.


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Bob


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