Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 

Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC Technical Forums > Solar, Charging Systems, Batteries and Electrical
Click Here to Login

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-20-2023, 05:42 PM   #1
Rotnjonny
Established Member
 
Join Date: Dec 2022
Location: Hershey
Posts: 47
M.O.C. #32150
Generator Prep / Transfer Switch

I have a 2022 Montana 3791RD with Legacy Package. It has the factory generator prep package. I want to wire an additional 50 amp input box up front for when I want to use my portable generator. I have located the box that has the terminated ends for the generator installation in the front basement (wired to transfer switch I would assume) I have a green and ground tied together. I have a red terminated and a black terminated. All this makes sense. BUT I also have a solid blue and a solid white tied together. These two I am unfamiliar with. What is the purpose of the blue and white? Is that part of the stop/ start for an onboard unit?

I used the search feature but didn’t find a diagram. Any assistance would be greatly appreciated

Thank you
Attached Thumbnails
Click image for larger version

Name:	IMG_4737.jpg
Views:	23
Size:	186.6 KB
ID:	15978  
 
Rotnjonny is offline   Reply With Quote
Old 11-20-2023, 08:13 PM   #2
rohrmann
Montana Master
 
rohrmann's Avatar
 
Join Date: Oct 2012
Location: Box Elder
Posts: 4,618
M.O.C. #12947
Red and black are the two hotlegs. Green is the ground, but where is the other wire you are calling a ground? There will only be one ground, one neutral, normally white, which is a current carrying conductor along with the two hot legs.
__________________
Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
rohrmann is offline   Reply With Quote
Old 11-21-2023, 06:24 AM   #3
Rotnjonny
Established Member
 
Join Date: Dec 2022
Location: Hershey
Posts: 47
M.O.C. #32150
In the picture, you will see a green ground, with an earth ground/neutral (copper uninsulated). There is a black and a red. Those are the hot legs. There is a solid white with a solid blue attached. That is the pair that I haven’t seen before.
Rotnjonny is offline   Reply With Quote
Old 11-21-2023, 07:53 AM   #4
Daryles
Montana Master
 
Daryles's Avatar
 
Join Date: May 2019
Location: Alton
Posts: 2,507
M.O.C. #24086
Here's a picture inside a transfer switch (not mine).
It shows a bue and white wire together in one of the terminals.
Attached Thumbnails
Click image for larger version

Name:	Electrical Generator Transfer Sw 4 -2.jpg
Views:	42
Size:	1.24 MB
ID:	15979  
Daryles is offline   Reply With Quote
Old 11-21-2023, 07:58 AM   #5
Foldbak
Montana Master
 
Foldbak's Avatar
 
Join Date: Jan 2022
Location: Shingle Springs
Posts: 1,909
M.O.C. #30417
See the attached pictures. The romex comes from the TS. Follow those colors.
Attached Thumbnails
Click image for larger version

Name:	30-50 rv service.jpg
Views:	16
Size:	64.0 KB
ID:	15980   Click image for larger version

Name:	50 Amp.gif
Views:	27
Size:	66.0 KB
ID:	15981   Click image for larger version

Name:	TS.jpg
Views:	15
Size:	64.9 KB
ID:	15982  
__________________
Tony & Donna
2022 Montana HC, 295RL, Solar Flex 400, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
Foldbak is offline   Reply With Quote
Old 11-21-2023, 10:57 AM   #6
Rotnjonny
Established Member
 
Join Date: Dec 2022
Location: Hershey
Posts: 47
M.O.C. #32150
Quote:
Originally Posted by Daryles View Post
Here's a picture inside a transfer switch (not mine).
It shows a bue and white wire together in one of the terminals.
Thank you. That confirms where they are using it on the transfer switch. I personally havenít seen a blue/white used like this.
Rotnjonny is offline   Reply With Quote
Old 11-27-2023, 08:48 PM   #7
Mark7
Montana Fan
 
Mark7's Avatar
 
Join Date: Sep 2016
Location: Fargo
Posts: 201
M.O.C. #19032
The blue wire is (correctly) identified with white tape meaning someone wanted future "electricians" to know it was not a mistake. When using any color other than white (gray for 277/480) for a neutral it needs to be identified as such.

Same goes for using a white wire as a "hot" leg. It used to be done all the time for switch legs, but it needed to be identified, usually with a wrap of black tape to ID it as a line voltage wire.

Would be curious what the other end of that blue/white wire is hooked to though... Seems funny a manufacturer would not just use a white wire.

edit: Looking again it looks like that blue wire is part of a wrapped cabe (Romex) or a drop cord some sort. Is there also a bare ground wire present in that cable? I don't think I have ever seen a 10-4 WG cable for 120VAC wiring unless it is 3PH. Then Red, Black, Blue and White would make sense. Interesting!
__________________
2004 Montana 3295RK
2019 Ram / Cummins 2500
Summer season weekend warrior
Mark7 is offline   Reply With Quote
Old 11-28-2023, 05:31 AM   #8
Rotnjonny
Established Member
 
Join Date: Dec 2022
Location: Hershey
Posts: 47
M.O.C. #32150
I am glad I am not alone in finding this situation as interesting. 😊

I have not traced the wiring back to the transfer switch yet, so I havenít seen the other end. One of the other members posted a picture of the transfer switch that is contained in the thread.

I do not claim to be a professional electrician, but I have done my fair share of electrical work as a home owner and RV owner. It strikes me as odd that there are six lines present. The black and red are capped. Those are the hot legs for sure. The solid copper and green are capped together, which I would have believed to be ground/neutral. The white and blue are capped together. The blue has the white wrapping as you identified. Thats what I found as ďcurious Ē.

I suspect once I trace the lines back to the transfer switch, it will be much more clear.
Rotnjonny is offline   Reply With Quote
Old 11-28-2023, 07:08 AM   #9
Lee-CI
Montana Master
 
Lee-CI's Avatar
 
Join Date: Dec 2021
Location: Northeast TX
Posts: 878
M.O.C. #30262
Following
__________________
Lee, Edith & Lil' Bit the furry feline alarm clock
22 MHC 331RL, Surge Guard 35550, SumoSprings, Kodiak disc brakes, 412Ah Lithium, Gen 3 Goosebox, Sailun 85s
22 Ram 3500 CC DRW 6.7 CTD Herrin Hauler Classic Bed, 45 gal AUX tank
Lee-CI is offline   Reply With Quote
Reply

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
Forum Jump

» Featured Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 03:51 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2023, vBulletin Solutions, Inc.