Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
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 07-09-2013, 11:21 AM   #1
Member
 
mikenmo's Avatar
 
Winnebago Owners Club
Join Date: Dec 2008
Location: Wherever we are
Posts: 75
? on exercising generator

So we're parked for the summer and I want to exercise the generator. We're hooked to a good 50 amp service. (2008 Winnebago Tour)
The question is, if I start the gen while hooked to the shore power does the transfer switch cut to the gen power or does the sh.pwr. trump it?
I've always turned off the breaker and then run the gen with a load but am wondering before I try it without turning off the breaker what the sequence should be or if it could cause any problems. I've heard it is good to exercise the transfer switch too, this seems like a logical way to do it.
Thanks,
Mike
__________________

__________________
08 Winnebago Tour 40TD
04 Jeep TJ
Kids Gone, No Pets, FT since 01/10
mikenmo 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 07-09-2013, 11:31 AM   #2
Senior Member
 
Dmorgan6375's Avatar
 
Join Date: May 2013
Location: Unionville, Tenn.
Posts: 3,540
I could be wrong, but on my National Rig, the shore power will take over so i un plug the shore line when we use the gen. Just MOHO Here!
__________________

__________________
Douglas M. Morgan RVM96
04 Dolphin 6375 LX W-24 Chassis #434136
"The Journey is our Destination" Unionville, Tn.
Dmorgan6375 is offline   Reply With Quote
Old 07-09-2013, 11:35 AM   #3
Senior Member
 
FlyingDiver's Avatar
 
Newmar Owners Club
Join Date: May 2007
Location: Somewhere....
Posts: 3,820
On our coach, the generator has priority so just starting it up will cause the transfer switch to cut over. When in doubt, start it up, wait for it to stabilize (less than a minute), then turn off the pedestal breaker. You should also turn off any high amperage devices (ACs, etc) while you're switching over to reduce the wear on the transfer switch.
__________________
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
FlyingDiver is offline   Reply With Quote
Old 07-09-2013, 11:36 AM   #4
Senior Member
 
lthrnk's Avatar
 
Tiffin Owners Club
Fleetwood Owners Club
Appalachian Campers
Join Date: Jul 2007
Location: Titusville, FL
Posts: 694
If you turn on the generator while still pulling power from the pedestal it will work but now you are running both through the transfer case at the same time. Not a good idea. Best to run either one or the other and keep the heavy load out of the transfer case. Just shut down the park power and your AC's then start the genny. After the power comes up start the AC's and run for an hour a month. Might want to check the oil and coolant levels in the genny before the run.
__________________
"Home is where we park it" SEMPER FI
Winnie 30 RESS UltraLite TT 2015
Ford F250 XLT 2015
lthrnk is offline   Reply With Quote
Old 07-09-2013, 11:39 AM   #5
Senior Member
 
FlyingDiver's Avatar
 
Newmar Owners Club
Join Date: May 2007
Location: Somewhere....
Posts: 3,820
Quote:
Originally Posted by lthrnk View Post
If you turn on the generator while still pulling power from the pedestal it will work but now you are running both through the transfer case at the same time. Not a good idea. Best to run either one or the other and keep the heavy load out of the transfer case.
Huh? Do you know how a transfer switch works? It's just a big set of relays with an actuator. There's only going to be current through one side of the relay or the other. Can't be both. The current is going to run through the transfer switch no matter what.

And having voltage at both sets of contacts doesn't hurt anything at all.
__________________
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
FlyingDiver is offline   Reply With Quote
Old 07-09-2013, 11:41 AM   #6
Senior Member
 
Sky_Boss's Avatar


 
Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Location: ON THE ROAD...SOMEWHERE
Posts: 6,068
I take the conservative approach....

1. Turn off all high demand devices like the air conditioner.
2. Turn off the shore power at the breaker.
3. Start generator.
4. After it stabilizes (about 1 minute) I turn on everything I can to make it work as hard as possible.
5. 30 minutes or so later start shutting things down.
6. Let genny idle 2-3 minutes with almost no load.
7. shut it off.
8. Restore shore power and back to normal operations.

I do it this way to avoid stressing the ATS any more then needed.
__________________
Don, Sandee & GSD Zeus. Guardian GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is offline   Reply With Quote
Old 07-09-2013, 11:42 AM   #7
Senior Member
 
Ford Super Duty Owner
Join Date: Dec 2009
Location: Mcdonough, Ga.
Posts: 4,382
The transfer switch is spring loaded to shore power. It will change over to generator when voltage is sensed on the generator line. Out of a couple thousand units that I worked, maybe two had been wired backward. It will work either way. You can tell yours has been wired backwards by hearing the transfer switch make a loud CLICK when you plug the cord in. It is better to unplug the motorhome before starting the generator because under load the points can arch and cause a TIT on the points that keeps them from making contact.
__________________
1998 Pace Arrow 35 ft. F53 Ford V10 2012 Honda Civic toad
32 years mechanic at Delta Air Lines 15 year motorhome service manager. 3 popups....2 travel trailers....5 motorhomes....loved them all.
ga traveler is offline   Reply With Quote
Old 07-09-2013, 11:44 AM   #8
Senior Member
 
FlyingDiver's Avatar
 
Newmar Owners Club
Join Date: May 2007
Location: Somewhere....
Posts: 3,820
To each their own. I believe in reducing the load as much as possible before starting the generator, but I don't believe in turning off shore power first. I want to make sure the ATS actually is working the way I expect it to, which is to switch to the generator even if there's still shore power present. Which you can't test if you kill the shore power before starting the generator.
__________________
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
FlyingDiver is offline   Reply With Quote
Old 07-09-2013, 11:47 AM   #9
Senior Member
 
TonyDi's Avatar


 
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 10,442
My Gen set trumps the shore power. However, you can simply throw the main breaker in your MH to be sure. Unplugging at the pedestal is not necessary
__________________
Tony & Ruth........... FMCA#F416727
Newmar Dutch Star 4320, Spartan MM Chassis, Cat C9, Jeep Grand Cherokee Hemi, Blue Ox Aventa LX, and Brake Buddy. TST 507 TPMS
TonyDi is online now   Reply With Quote
Old 07-09-2013, 11:53 AM   #10
Senior Member
 
FlyingDiver's Avatar
 
Newmar Owners Club
Join Date: May 2007
Location: Somewhere....
Posts: 3,820
Quote:
Originally Posted by TonyDi View Post
My Gen set trumps the shore power. However, you can simply throw the main breaker in your MH to be sure. Unplugging at the pedestal is not necessary
What does throwing the main breaker in the MH accomplish? It's after the transfer switch, so it does nothing to disconnect from shore power. If you want to disconnect shore power, you need to either unplug or turn off the pedestal breaker (if there is one).
__________________
2008 King Aire 4562, Spartan K3(GT) w/ Cummins ISX 600
2014 Jeep Grand Cherokee Overland 5.7L V8 Hemi w/ Blue Ox Aventa LX Tow Bar and baseplate, SMI Air Force One brake
FlyingDiver is offline   Reply With Quote
Old 07-09-2013, 11:57 AM   #11
Member
 
mikenmo's Avatar
 
Winnebago Owners Club
Join Date: Dec 2008
Location: Wherever we are
Posts: 75
thanks to all

this forum is always great, thanks for the quick responses. this is my day off so I got a lot to do, besides sit in front of the computer!
__________________
08 Winnebago Tour 40TD
04 Jeep TJ
Kids Gone, No Pets, FT since 01/10
mikenmo is offline   Reply With Quote
Old 07-09-2013, 07:31 PM   #12
Senior Member
 
Alan_Hepburn's Avatar
 
Fleetwood Owners Club
Workhorse Chassis Owner
Join Date: Feb 2000
Location: San Jose, Ca, USA
Posts: 1,045
As has been stated the purpose of the transfer switch is to protect anybody who might be working on the power lines upstream from your connection when a generator is feeding the line. So, when you turn your generator on the transfer switch is REQUIRED to disconnect the shore power.
__________________
Alan Hepburn - San Jose, Ca
2007 Bounder 35E being pushed by a 2008 smart fortwo Passion
Good Sam Member #566004 * FMCA Member #F431612
Alan_Hepburn is offline   Reply With Quote
Old 07-09-2013, 07:37 PM   #13
Senior Member
 
stink's Avatar
 
Join Date: Apr 2012
Posts: 1,414
Quote:
Originally Posted by Sky_Boss View Post
I take the conservative approach....

1. Turn off all high demand devices like the air conditioner.
2. Turn off the shore power at the breaker.
3. Start generator.
4. After it stabilizes (about 1 minute) I turn on everything I can to make it work as hard as possible.
5. 30 minutes or so later start shutting things down.
6. Let genny idle 2-3 minutes with almost no load.
7. shut it off.
8. Restore shore power and back to normal operations.

I do it this way to avoid stressing the ATS any more then needed.
I like the checklist!!
__________________
Dave and Laura & two cats
02 Discovery with Accord toad
retired auto rv tech and teacher, wife rt nurse
stink is offline   Reply With Quote
Old 07-09-2013, 07:40 PM   #14
Community Administrator
 
Clifftall's Avatar


 
Fleetwood Owners Club
Ford Super Duty Owner
Join Date: Aug 2009
Posts: 29,121
Quote:
Originally Posted by stink View Post
I like the checklist!!
Me too . It's exactly what I do. I just did it yesterday.
__________________

__________________


Cliff,Tallulah and Buddy ( 1999-2012 )
Clifftall is offline   Reply With Quote
Reply

Tags
generator



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


» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 10:47 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.