RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 12-10-2019, 02:30 PM   #21
Rivet Master
 
Mollysdad's Avatar

 
2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 5,226
Blog Entries: 1
Quote:
Originally Posted by overlander63 View Post
Not true.
50 amp service is 50 amp service. 30 amp+20 amp =50 amp. You don't add 2+2 and get 22.
Yes, true.

50 amp service is two legs of 50 amp 120 v. service.
So think of it like this:
Leg 1, 50 amp x 120 v. = 6,000 watts.
Leg 2, 50 amp x 120 v. = 6,000 watts.
Total available watts = 12,000 watts.

In your example to equate 30 + 20 = 50:
30 amps x 120 v = 3,600 watts.
20 amps x 120 v. = 2,400 watts.
Total available watts = 6,000 watts, exactly half of the 50 amp service.

30 amp only service:
30 amps x 120 v. = 3,600 watts.

The difference between 50 amp and 30 amp 12,000 - 3,600 = 8,400 watts!
Mollysdad is offline   Reply With Quote
Old 12-11-2019, 06:40 AM   #22
Half a Rivet Short
 
2017 30' Classic
Carlisle , Pennsylvania
Join Date: May 2017
Posts: 9,061
Quote:
Originally Posted by Al and Missy View Post
Bob,

If not fed with 240, then the current available is only 50A so shouldn't be a problem, right?

Same situation as if the loads on the one phase are not in use - i.e. second AC.

Al
Hi

You have breakers that trip at a total of 100A. If you wire them to 110V, there is nothing stopping you from pulling the full 100A. So indeed it can be a problem.

With "everything" running on a big trailer, you can go over 50A total drain. If it's cold out, you can hit that without trying very hard ( two A/C's running plus the electric furnace plus ...). The wire / connectors are "happy" running at 80% of the rated load ( = 40A). As you go over this, you are getting into the "wear out faster" zone.

Why does this matter?

If the post you are plugged into is not wired correctly, you are set up for a problem on the neutral. Miss-wired the connector will wear out quicker. That just makes things worse.

If you ever have a connector melt down on you in a campground ... check the voltage !!!! If it's a 50A circuit wired with 110V, you have a *very* good reason to get them to replace things at their expense !!!

Bob
uncle_bob is offline   Reply With Quote
Old 12-11-2019, 08:56 AM   #23
Rivet Master
 
Mollysdad's Avatar

 
2017 26' Flying Cloud
Tampa , Florida
Join Date: Feb 2017
Posts: 5,226
Blog Entries: 1
Quote:
Originally Posted by uncle_bob View Post
You have breakers that trip at a total of 100A. If you wire them to 110V, there is nothing stopping you from pulling the full 100A.
Yes and no.
Remember, there are two 50 amp legs, each with a 50 amp breaker.
So, in theory, you could pull 100 amps as long as the load was balanced perfectly between the two legs. But it won't be.
Mollysdad is offline   Reply With Quote
Old 12-15-2019, 04:13 PM   #24
Rivet Master
 
jeffmc306's Avatar
 
2019 27' Globetrotter
McHenry , Illinois
Join Date: Apr 2018
Posts: 1,108
Blog Entries: 4
Another telltale sign of a 30A unit is the presence of a generator hookup on the front of the trailer. Units with 50A do not have it.
__________________
2019 27 Globetrotter FBT Walnut/Dublin Slate
2018 FC23FB
2019 Ram 2500 6.4 Hemi Laramie Blue Ox 1000#
WBCCI# 10258
RETIRED!
jeffmc306 is offline   Reply With Quote
Old 12-15-2019, 07:41 PM   #25
Rivet Master
 
tjdonahoe's Avatar
 
2013 31' Classic
billings , Montana
Join Date: Feb 2010
Posts: 2,795
Quote:
Originally Posted by link2dks View Post
50 amp not mentioned on my "window sticker" either. I have two AC/Heat Pumps and 50 amp service in my trailer.

Dave S


Attachment 357393
It looks like standard with 1 ac...30 amp service...then at the bottom the 2 ac was added...with 50 amps
tjdonahoe is offline   Reply With Quote
Old 12-16-2019, 09:36 AM   #26
Rivet Master
 
2019 27' Globetrotter
Salem , Oregon
Join Date: Nov 2015
Posts: 660
The answer to the question is on the Airstream sheet shown on the above attachment from tjdonahoe. Notice before an items are listed.


(THE FOLLOWING ITEMS ARE STANDARD ON THIS MODEL UNLESS REPLACED BY OPTIONAL EQUIPMENT)


Dave
NoResults is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
upgrading coverter - battery query jeftec Batteries, Univolts, Converters & Inverters 3 06-30-2007 08:40 PM
New wire Query. Annabel Electrical - Systems, Generators, Batteries & Solar 9 09-16-2006 10:34 AM
food query norbert Off Topic Forum 8 12-15-2004 08:46 PM
A/S Factory query blucloud Off Topic Forum 1 07-13-2004 09:58 AM
Re: Horn 2nd query Orland Dewey General Motorhome Topics 14 07-11-2003 03:19 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 06:25 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.