Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×


Reply
 
Thread Tools Display Modes
Old 02-03-2017, 12:35 AM   #21
Senior Member
 
MNtraveler's Avatar
 
Join Date: Oct 2015
Posts: 2,058
Pedestal 30 amp Breaker

Quote:
Originally Posted by gectisme View Post
Not saying your wrong, every RV is going to be a little different and don't forget the Converter/Battery Charger too. But, we ran all summer with A/C, Electric Water Heater, 2 fridges without ever tripping the breaker. The only time we have tripped a breaker was when we ran the microwave with all those things on.



True - also the power control center (converter).

On our Forester 2401R, in amps:

A/C Dometic 459196 15,000 BTU: compressor 13.3A + fan 2.0A = 15.3A

Atwood 6 gal. GC6... not in manual, Atwood service manual online refers to 1400W/12.7A

PDI Power Control Center PD4060K: 1000W input = 8-9A (based on stated 110-120V range)

Total if all running at max (not counting A/C startup mode demand): 36-37A

So that combo is a no-go on a 30A system.

The converter may be presumed to run lower after the battery is charged, but even without any of that, the load is 28A so very close to capacity.

"Your results may vary."
__________________
2016 FR Forester 2401R
Towing 2014 Honda CR-V
MNtraveler is offline   Reply With Quote
Old 02-18-2017, 11:24 AM   #22
Senior Member
 
Join Date: Mar 2016
Location: Marion, IL
Posts: 488
Brought my 50 to 30 back with me after I took wife home to IL. She had to go back to work. Flipped main breaker off in trailer, installed 50 to 30, turned trailer breaker back on. I've been back in Florida 3 days now and no problems yet.

Thanks for the advice.
__________________
2012 Windjammer 3001W
2016 Sunset Trail Super Lite 250RB-For Sale
2015.5 Chevrolet Silverado 2500HD LTZ crew cab Z71 4x4
KingFisher is offline   Reply With Quote
Old 02-18-2017, 11:37 AM   #23
Left Coast
 
Join Date: Dec 2014
Location: vancouver,washington
Posts: 15,649
Send a message via Yahoo to bob caldwell
Turn water heater off
bob caldwell is offline   Reply With Quote
Old 02-18-2017, 04:12 PM   #24
Senior Member
 
SailorSam20500's Avatar
 
Join Date: Jun 2016
Posts: 3,755
Reading thru this tread piqued my curiosity. I vaguely remembered reading somewhere that breakers really had 2 ratings - max and continuous. So I did some surfing. Based on what I found, you can expect your 30 amp breaker to pop if you exceed 30 amps but it may take an hour to pop! It doesn't have to pop immediately. Also the breaker will likely pop if you pull around 24 amps for an extended period of time. These comments are based on finding the following info...

1. T-M breakers trip upon reaching the rated current.
T-M breakers trip according to a trip curve, which includes both 135 percent and 200 percent trip times. At 135 percent of rated current, the breaker must trip in 1 hour or less. The trip curve is non linear as loads approach the breaker ratings (FIGURE 1), therefore, at even 5 percent above trip rating, there is no guarantee that the breaker will ever trip.
2. T-M circuit breakers always trip immediately.
These breakers trip thermally in seconds to minutes (depending on current level), per the published trip curve, in overload situations. In short circuit situations, trip times can be several cycles (ac voltage inversions).

The general run of molded case circuit breakers in frame sizes of 400 A and below are rated to carry only 80 percent of their rated trip current on a continuous basis. Particularly when these breakers are mounted close to each other in a panelboard, the extra heat generated by carrying 100 percent of the trip rating will both lead to false tripping and cause long-term degradation of the insulating material of which these breakers are made.
__________________
Al
Save the Earth. Itís the only known planet with Beer.
When everything is coming your way, you're in the wrong lane.

S.E. Mich. Flagstaff 26FKWS / 2019 F-150 3.5 EcoBoost SCrew Propride
SailorSam20500 is online now   Reply With Quote
Old 02-19-2017, 09:15 PM   #25
Junior Member
 
Join Date: Aug 2015
Posts: 7
On the subject of dogboning from 30 to 50 amp, can I still use my portable 30amp PI EMS while doing that?
mordecai is offline   Reply With Quote
Old 02-19-2017, 10:00 PM   #26
Senior Member
 
Join Date: Jun 2015
Location: payson, az
Posts: 3,056
i'm assuming you mean a 30 amp male to 50 amp female dogbone. sure you can use a portable 30 amp ems. you will have to plug it into the pedestal and then plug the 30 amp male end of the adapter into it. remember you really only have a 30 amp circuit into your rv, even though it is travelling down a 50 amp cable.
__________________
2015 cardinal model 3825fl
2015 dodge ram 3500 dually
CHICKDOE is offline   Reply With Quote
Old 02-19-2017, 10:34 PM   #27
Left Coast
 
Join Date: Dec 2014
Location: vancouver,washington
Posts: 15,649
Send a message via Yahoo to bob caldwell
The dog bone splits the voltage...
bob caldwell is offline   Reply With Quote
Old 02-19-2017, 10:45 PM   #28
Site Team
 
wmtire's Avatar
 
Join Date: Nov 2010
Location: Northeast Louisiana
Posts: 25,939
Quote:
Originally Posted by mordecai View Post
On the subject of dogboning from 30 to 50 amp, can I still use my portable 30amp PI EMS while doing that?
Yes. The way the 50 amp male to 30 amp female dogbone adapter works (which I am assuming you have a 30 amp RV thus the 30 amp EMS) is that the adapter just terminates one of the 120/240 legs that a 50 amp RV utilizes (50 amp has TWO 120 volt hot legs where a 30 amp just has one). It's just not connected to anything feeding your RV.

Since the adapter terminated one of the hot legs inside the adapter, you only have the single leg 120 volts feeding into your RV's 30 amp power cord. Although it is capable of providing 50 amps (instead of 30), your EMS will function as normal. You just want to keep your power usage to 30 amps as you normally would when connected to a 30 amp power supply. Everything else functions as normal.

This schematic may help:

__________________
2011 Flagstaff 831 RLBSS

If I eat myself will I become twice as big?...or disappear all together?
wmtire is offline   Reply With Quote
Old 02-19-2017, 11:29 PM   #29
Junior Member
 
Join Date: Aug 2015
Posts: 7
Great! Thanks, folks.
mordecai is offline   Reply With Quote
Old 02-22-2017, 07:27 AM   #30
Senior Member
 
Join Date: Nov 2016
Posts: 865
For some campers with electrical understanding is is frequently better to create 2, 50-30 adaptors, rather than purchase one at the camping store..

As the diagram above shows one 120v leg is used from the two power legs that create the 240V 50A.

AS almost all the store plugs are wired the same , at times lots of folks will be drawing from the same 120V leg.

With 2 adaptors and a volt meter it is easy to select the less used leg with the highest voltage.

This will not get more amps to your rig , but with the higher voltage the air cond will labor less and last longer.
FFred is offline   Reply With Quote
Reply

Tags
breaker

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


» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



All times are GMT -5. The time now is 02:21 AM.