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Old 09-22-2015, 08:33 AM   #51
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Yes, Thank you...electric work scares the crap outta me...any advice is always welcome...

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Originally Posted by mowdoc View Post
Ha Ha, Joe - gotcha!! Your comments make good sense now.


Everyone reading - - - if you are a first time owner and have no experience with RV electrical, ALWAYS shut off all 120V loads BEFORE you start or stop the genny OR connect or unplug your shore power plug from a pedestal.


Having heavy loads such as A/C turned on will cause the contacts in the transfer box to arc which shortens the life of them dramatically.


Normal performance is to hear the transfer switch make a thump noise when the shore power begins, normally when the plug blades enter the socket.


When starting the Onan genny, it will normally run a minute or two before the transfer switch connects. This gives the engine time to warm and find correct RPM before pulling a load.


In our Precept coaches the transfer switch is located under the master bed.


ALSO, very important, if you hear the transfer switch clicking over and over there is too much load turned on. It is trying to engage but senses the load and backs off. You will need to find the load and remove it to correct this condition. Usually this will be an A/c in the on position.
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Old 09-22-2015, 09:43 PM   #52
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I noticed the post about transfer switch. I am reading this in a campground in Colorado. Apparently my transfer switch is out. I have power on the generator but nothing on shore power. Is this a common problem? I have a Jayco Seneca with a cummins generator. Everything I read states that the transfer switch defaults to shore power. Where is the transfer switch normally located?
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Old 09-23-2015, 04:56 AM   #53
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I may be 180 degrees out here, but I think my transfer switch defaults to generator. That is the reason you hear that "thunk" when first connecting to shore power after the delay. That is the switch transferring from it's default position to shore power position.

If I'm wrong please correct me.
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Old 09-23-2015, 07:17 AM   #54
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Try this... turn off all your AC loads (use breakers if possible), then disconnect shore power... see if it makes the loud noise without a load on it. I believe the noise is in the electronic relays which have heavy duty springs to snap the relay contacts.

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Old 09-23-2015, 07:34 AM   #55
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seneca37rb15, I would verify the pedestal has power and the pedestal breaker is on. In older CGs it is not uncommon to find a bad leg or open neutral in the 50 amp supply too. Perhaps you can reach another pedestal with your plug to try that one? Try one that you know works on another RV.


From there I would check the breakers in RV panel. At this point it could be anything. Broken wire in your shore wire, bad transfer switch, loose wore anywhere on the rig - just about anything connected can give trouble.


What you are experiencing is not common. The transfer switch on the Precept is under the master bed. Not sure about the Seneca except they are nice rigs!! The Precept bed lifts up like a trunk lid on a car does. Under there you will see a sheet of paneling with 4 screws holding it in place. Remove screws and paneling and you will see a big ole gobbed up mess of wiring. It's a shame how Jayco just leaves all the wiring loose and unlabeled. Color code is very poor too so you need to kinda understand electricity to even attempt a fix.
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Old 09-30-2015, 09:52 PM   #56
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Installed a Surge Guard with a remote power monitor between the xfer switch and the coach power box. That way it will monitor both the generator or shore power. when power is applied, the surge guard monitors both hot legs and if there is a problem, it will not pass the power. If all is ok, after 128 seconds it passes power thru. Needed the remote as I installed the surge guard under the bed. found a loose neutral wire on the xfer switch during the install. BTW what a mess of wires under that bed.
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Old 10-01-2015, 06:30 AM   #57
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Installed a Surge Guard with a remote power monitor between the xfer switch and the coach power box. That way it will monitor both the generator or shore power. when power is applied, the surge guard monitors both hot legs and if there is a problem, it will not pass the power. If all is ok, after 128 seconds it passes power thru. Needed the remote as I installed the surge guard under the bed. found a loose neutral wire on the xfer switch during the install. BTW what a mess of wires under that bed.
Oh yeah, they get no points for neatness with the transfer switch wiring...horrible
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Old 10-01-2015, 07:46 AM   #58
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Yes, after you take one look at that fire hazard it makes you think twice if you want to sleep there!!
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Old 10-01-2015, 11:24 AM   #59
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That mess also gets hot and radiates heat up to the bed. It is the primary reason we are shopping for a different motorhome. We actually installed a smoke detector in that compartment for some peace of mind.
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Old 10-01-2015, 11:34 AM   #60
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That mess also gets hot and radiates heat up to the bed. It is the primary reason we are shopping for a different motorhome. We actually installed a smoke detector in that compartment for some peace of mind.

I am going to install a hard wired power monitor soon with remote display. I plan to tidy up that wiring mess while I am there but your smoke detector idea is golden!

I'll mount a Home Depot smoke detector under the bed this weekend.

THANKS FOR A GREAT IDEA!!
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