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

Go Back   iRV2 Forums > RV SYSTEMS AND TECHNOLOGIES FORUMS > RV Systems & Appliances
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 09-18-2021, 05:35 PM   #1
Senior Member
 
Join Date: May 2018
Posts: 239
AC wiring of Magnum msh3012rv

I am planning to upgrade my inverter and add lithium. I have decided on a Magnum msh3012rv hybrid inverter.

I have a 34 ft class A. I want to connect everything in the coach with the exception of the water heater to the inverter. That way I should be able to run anything (obviously not everything) off the inverter plus when I have a 30 amp connection I should be able to pull more then 30 amps as long as the average is not over 30 amps.

I understand that others have done this using 10 guage wire which I am puzzled by. 10 guage can handle 30 amps which is plenty for me when hooked up to 50 amps since there are 2 legs which are out of phase. My concern is when hooked up to 30 amps or when running the generator where the 2 legs will be on the same phase and thus the neutral leg will need to carry well over 30 amps at times(think both AC plus microwave and maybe coffee maker or toaster).

Why do others with this inverter not have problems with 10 guage wire?

I am leaning towards using 6 guage wire although 8 guage may be okay. I suppose another option would be to use 10 guage wire but somehow double up the neutral wire by using a 4 conductor plus ground wire or maybe split those wires over 2 cables.

Does anyone using this inverter have any insight on AC wiring?

TIA.
dssl is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 09-18-2021, 08:23 PM   #2
Senior Member
 
Join Date: May 2018
Posts: 239
For some reason it doesn't give me the option to edit the post.

Was trying to research about doubling up the neutral wire and it sounds like that isn't considered kosher, so I shouldn't consider that. I guess I could maybe use a 10/2 wire for the hot wires and ground and then a separate 6 guage wire for the neutral .
dssl is offline   Reply With Quote
Old 09-18-2021, 09:12 PM   #3
Senior Member
 
Damon Owners Club
Join Date: Apr 2020
Posts: 2,378
Blog Entries: 3
I would think that a 3k inverter would not be sufficient to pass current enough for 2 AC units along with say a microwave. Go online and read the manual on the inverter. You will probably find that 10 gage is recommended for that inverter. Your neutral wire should never carry the full load of the power source.
__________________
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.
Retired AF
HarryStone is offline   Reply With Quote
Old 09-18-2021, 09:18 PM   #4
Senior Member
 
Join Date: May 2018
Posts: 239
Quote:
Originally Posted by HarryStone View Post
I would think that a 3k inverter would not be sufficient to pass current enough for 2 AC units along with say a microwave. Go online and read the manual on the inverter. You will probably find that 10 gage is recommended for that inverter. Your neutral wire should never carry the full load of the power source.
It's a hybrid inverter with a 50 amp X 2 bypass. The idea is if the generator or 30 amp shore power isn't sufficient it can add. For example if you had a 30 amp source you could pull more then 30 amps.

The manual recommends 6 guage wire. But I will never draw near 50 X 2 amps so it's a bit of overkill to use 6 guage wire except for the neutral.
dssl is offline   Reply With Quote
Old 09-18-2021, 11:40 PM   #5
Senior Member
 
Join Date: Jul 2014
Posts: 28,594
You may never draw 50 amps x 2 but you certainly could draw more the 30amps on one leg or the other.

Since your 50 amp shore power input is running thru this inverter, use 6 gage wire, as recommended.

While on 30 amp shore power, the hybrid inverter is designed to boost that amperage above that, up to 50 amps.
twinboat is offline   Reply With Quote
Old 09-19-2021, 07:13 AM   #6
Senior Member
 
Join Date: May 2018
Posts: 239
Quote:
Originally Posted by twinboat View Post
You may never draw 50 amps x 2 but you certainly could draw more the 30amps on one leg or the other.

Since your 50 amp shore power input is running thru this inverter, use 6 gage wire, as recommended.

While on 30 amp shore power, the hybrid inverter is designed to boost that amperage above that, up to 50 amps.
I was thinking of having 30 amp fuses but I guess it's silly I may as well just go with 6/3.

Next question not sure if you know. When I search for 6/3 wire this THN wire which is for submersible pumps comes up at a very good price. I was assuming I would use romex nm wire but if this is cheaper. Do you know if it would be appropriate?


https://nassaunationalcable.com/products/6-3-heavy-duty-flat-grnd-thw-copper-600v?gclid=Cj0KCQjwv5uKBhD6ARIsAGv9a-zT6FUc9_G4rLfcYIX2uDsVd0zYYVtAAVN2-G48AkqZFRtxumK-KEYaAtTMEALw_wcB
dssl is offline   Reply With Quote
Old 09-19-2021, 10:52 AM   #7
Senior Member
 
Damon Owners Club
Join Date: Apr 2020
Posts: 2,378
Blog Entries: 3
I don't see why not. It's temp rating is sufficient and the jacket is weather and sunlight resistant.
__________________
2006 Damon Daybreak 3276 35'with 5 Star Tuner. 3 200 Amp Lithium batteries and 2000 watt PSW inverter/charger. 2013 Elantra on a Master Tow dolly.
Retired AF
HarryStone is offline   Reply With Quote
Reply

Tags
wiring



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
Magnum MS2812RV TO MSH3012RV UPGRADE Vickie 4369 Newmar Owner's Forum 35 04-24-2021 01:59 PM
Upgrade Magnum MS2012H to MSH3012RV Jimmyb12015 RV Systems & Appliances 9 02-17-2021 11:14 AM
Xantrex RV3012GS to Magnum MSH3012RV vsheetz RV Systems & Appliances 1 12-02-2019 07:56 AM
Upgrading from Magnum ME-2000 MSW inverter to Magnum ME-2800 PSW inverter. Stan&Jacquie MH-General Discussions & Problems 7 11-12-2015 07:54 PM
1997 Beaver Patriot on a Magnum chassis Wiring Diagram jimkitch Monaco Owner's Forum 4 01-30-2013 05:40 PM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 11:24 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.