Reply
 
Thread Tools Display Modes
Old 05-30-2016, 03:23 PM   #21
larryandamy
 
Join Date: Apr 2016
Location: Escondido, CA
Posts: 98
30A / 50A

I wrote a long and detailed explanation post on this before detailing that there is very slight risk of doing this. My recommendation is that there is no issue doing this. I can't find the post so a quick summary is below.

For something bad to happen 2 to 3 simultaneous events have to occur for there to be a burning issue. There is no single point of failure that would not be covered.
Your trailer and all the internal wiring is protected with its own 30A circuit breaker. So that CB would have to fail and CB's almost never fail by not tripping. If they fail, they trip prematurely.
The only way to draw more current than your trailer 30A wiring can handle that would not be protected by your trailer 30A CB tripping is a short in the wiring from the trailer CB to the 50A hookup. This would due to insulation abrasion or wires getting crushed or cut. And these short circuit events usually draw very short duration extremely high currents (arcing and sparking) that would trip the 50A site hookup CB.

So I concur... Just do it!
__________________

__________________
larryandamy is offline   Reply With Quote
Old 05-30-2016, 03:32 PM   #22
Senior Member
 
raspivey's Avatar
 
Join Date: Jun 2013
Location: Brazoria County, Texas
Posts: 1,361
Quote:
Originally Posted by nephi007 View Post
So i have a Progresssive Industries SSP-30X Smart Surge Protector Q: If I use a 39 to 50 amp adaptor do I now need a 50 amp PI Surge Protector?
No, the wiring in the adapter will take care of that.
__________________

__________________
2015 Chevy Silverado LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition
raspivey is offline   Reply With Quote
Old 05-30-2016, 04:36 PM   #23
Member
 
Join Date: Jul 2015
Posts: 42
Hey everybody thanks for the tip. So i will buy to 30 amp to 50 amp adaptor and use the Progressive Industries 30 amp protector and call it good.
__________________
nephi007 is offline   Reply With Quote
Old 05-30-2016, 06:13 PM   #24
Junior Member
 
Join Date: May 2016
Location: MS Gulf Coast
Posts: 16
I agree.
__________________
2016 Flagstaff 23 FB, GVWR 5385
Tundra, Double Cab, 5.7
TRD Off Road 4x4, GVWR 7200 lbs.
w/ tow package
MS Gulf Coast
Goff is offline   Reply With Quote
Old 05-30-2016, 11:30 PM   #25
Senior Member
 
Join Date: Dec 2014
Posts: 329
I always use the 50 amp plug when available, never had a problem. Most 30 amp breaker are so worn out they trip easy. Also, when it's hot with high humidity, run your a/c fan on high, not on auto. The fan will run all the time, the compressor will work when it's needed. In the evening, when it cools down, turn the fan control back to auto so it will cycle when you sleep.
__________________
tomrob1161 is offline   Reply With Quote
Old 06-01-2016, 11:29 PM   #26
Member
 
Join Date: Apr 2015
Posts: 94
Talking 30 amp breaker

Don't think I saw this in any of the posts. You said your A/C kept popping breaker. One thing to remember, each time the breaker pops, that breaker weakens and eventually will fail. So at this point your breaker could be in a weaker condition and pop easily. So you might want to replace it.
__________________
texasbuckeye is offline   Reply With Quote
Old 06-01-2016, 11:54 PM   #27
Senior Member
 
Join Date: Apr 2015
Location: Orlando
Posts: 427
Quote:
Originally Posted by Iwannacamp View Post
I posted this one time before and got backlash...
I have a Progressive Industries EMS(had on a 30amp 5er) and had a warranty issue. While talking to the tech from PI he told me to always use the 50 amp plug(with adapter) when applicable, because it was cleaner power. FWIW
That's funny. Power "cleanliness", which I assume he was referring to the quality of the waveform, is a non issue with utility power. The only issue I can see is that with a 50 amp supply you are using 1 leg to supply a 30 amp plug. A 50 amp breaker is meant to supply 25 amps to each leg. Wire size at the panel breaker may also become an issue, not sure about that one as I don't recall if wire gauge is larger when increasing from 25 to 30 amps. If you are using a generator with a 220v outlet don't use a single leg of it to supply 30 amps, the breaker will kick. If you have access to a 30 amp plug for your 30 amp RV, use the 30 amp plugs.
__________________
Brewhedd is offline   Reply With Quote
Old 06-02-2016, 12:44 AM   #28
Senior Member
 
Join Date: Jan 2013
Posts: 1,477
Quote:
Originally Posted by Brewhedd View Post
That's funny. Power "cleanliness", which I assume he was referring to the quality of the waveform, is a non issue with utility power. The only issue I can see is that with a 50 amp supply you are using 1 leg to supply a 30 amp plug. A 50 amp breaker is meant to supply 25 amps to each leg. Wire size at the panel breaker may also become an issue, not sure about that one as I don't recall if wire gauge is larger when increasing from 25 to 30 amps. If you are using a generator with a 220v outlet don't use a single leg of it to supply 30 amps, the breaker will kick. If you have access to a 30 amp plug for your 30 amp RV, use the 30 amp plugs.
I believe a 50 amp, 220 volt circuit supplies 50 amps to each leg. Check the breaker at the pedestal or in your RV and you will see double 50 amp breakers ganged together...
__________________
2016 Siverback 33IK
2015 Ford F-250 Lariat 6.7L V8 Diesel 4WD Super Cab

"If you don't know where you are going, any road will get you there."
dalford is online now   Reply With Quote
Old 06-02-2016, 05:47 AM   #29
Site Team
 
wmtire's Avatar
 
Join Date: Nov 2010
Location: Northeast Louisiana
Posts: 15,043
Quote:
Originally Posted by Brewhedd View Post
That's funny. Power "cleanliness", which I assume he was referring to the quality of the waveform, is a non issue with utility power. The only issue I can see is that with a 50 amp supply you are using 1 leg to supply a 30 amp plug. A 50 amp breaker is meant to supply 25 amps to each leg. Wire size at the panel breaker may also become an issue, not sure about that one as I don't recall if wire gauge is larger when increasing from 25 to 30 amps. If you are using a generator with a 220v outlet don't use a single leg of it to supply 30 amps, the breaker will kick. If you have access to a 30 amp plug for your 30 amp RV, use the 30 amp plugs.
Quote:
Originally Posted by dalford View Post
I believe a 50 amp, 220 volt circuit supplies 50 amps to each leg. Check the breaker at the pedestal or in your RV and you will see double 50 amp breakers ganged together...
Dalford is correct. A 50 amp 120/240 volt split phase service is TWO 50 amp hot legs with TWO 50 amp breakers ganged together in essence.....which provides 100 amps total.

The double pole breakers are tied together because they share a common neutral wire between them, which carries the return load imbalance between the two sides.

These links will explain it better:

Electrical Tutorial - Chapter 3 - 30 Amp versus 50 Amp

RV Electric

and this pic helps:

__________________
2011 Flagstaff 831 RLBSS

Ducks are just all-terrain chickens
wmtire is online now   Reply With Quote
Old 06-02-2016, 08:52 AM   #30
Senior Member
 
Join Date: Apr 2015
Location: Orlando
Posts: 427
Quote:
Originally Posted by dalford View Post
I believe a 50 amp, 220 volt circuit supplies 50 amps to each leg. Check the breaker at the pedestal or in your RV and you will see double 50 amp breakers ganged together...
That would be the first time I've heard of that. A 50 amp breaker in a supply panel, say the one in your home, is rated for 50 amps total not 100. There seems to be a large misconception that because a 50 amp breaker is marked 50 amps on each leg it can carry 100 amps. That is not the case, it is a 50 amp breaker.


Here's a 50 amp breaker, as you can see it's rated @ 50 amps.
New Cutler Hammer BR 2 Pole 50 Amp Breaker Free Shipping | eBay
__________________

__________________
Brewhedd is offline   Reply With Quote
Reply

Tags
50 amp

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 12:04 PM.