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Old 03-07-2009, 11:38 AM   #1
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Where do I ground converter?

I just bought an inteli-power 9100 converter for my globetrotter and cannot figure out where I ground it. The instructions say to ground it to the chassis; however, my converter goes underneath one of the gauchos and it doesn't seem like grounding to the chassis is a possibility. I figure I must be missing something and it's probably something obvious but I just can't figure out what it is.
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Old 03-07-2009, 11:48 AM   #2
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If your unit had a converter in it before there should be a ground wire allready there from the old one. If not see where your batteries are grounded and ground at that point. Somehow the trailer chassis ground and the batteries ground have to be connected to complete current flow.

If you have to install a new wire to complete this make sure it is the same size as the positive going between the converter and the batteries.
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Old 03-07-2009, 11:48 AM   #3
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It should hook up like the old one did. Your ground wire should already be there and grounded.
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Old 03-07-2009, 12:29 PM   #4
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The old Univolt was hardwired into the 120v and it had connections out to the distribution panel. No other wires. I may try to post a picture of the distribution panel as I have no clue where the battery is grounded. The whole thing looks a bit Rube Goldberg to me.
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Old 03-07-2009, 01:24 PM   #5
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If you trailer had a battery in it with the old univolt then the wire are there. There should have been 2 wires coming from the univolt to the panel. 1 was positive and 1 was ground. If you don't remember which was which, with the converter not installed, take a volt meter and check polarity of the battery connection at the panel. Once you have astablished which is positive do the same with the converter while it is plugged into 120. Now just connect positive to positive and ground to ground. Do not rely on wire color code to define positive or ground because not everyone udes the same codes back then.
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Old 03-07-2009, 02:21 PM   #6
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Quote:
Originally Posted by tphillips View Post
I just bought an inteli-power 9100 converter for my globetrotter and cannot figure out where I ground it. The instructions say to ground it to the chassis; however, my converter goes underneath one of the gauchos and it doesn't seem like grounding to the chassis is a possibility. I figure I must be missing something and it's probably something obvious but I just can't figure out what it is.
I think what tphillips is refering to is exactly what he is calling a ground wire. This would be a 3rd wire, the first 2 being the postive and negative( also called a ground) leading from the converter to the fuse panel. My old Univolt was not grounded, i.e have a separate, 3rd, ground wire. It also was hard wired to 110 and did not have a plug. Here is what I did: I put in a GFI 110 outlet to plug the Intellipower into and ran a wire from the Intellipower ground (attached to the chassis of the converter) and took the other end and riveted to the skin.
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Old 03-07-2009, 02:27 PM   #7
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My old converter had the standard 3 prong 120 volt plug along with positive and negative 12 volt lines. My new 9245 has those as well as an addition ground line for the frame of the converter. I attached a piece of wire and screwed it into the wall at a rib.
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Old 03-07-2009, 02:46 PM   #8
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It's the ground for the frame of the converter that I can't find a place to connect. On the good side, the converter seems to be working properly. I measure 13.72 volts across the battery connectors.
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Old 03-07-2009, 03:04 PM   #9
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Sorry I was thinking ground wire on the 12 volt side. The ground for the 120 side wants to go the the trailer frame. If you look at the shore line coming to the trailer you will see that it is connected to the trailer frame. Just make sure this is a good solid paint free connection or use spider washers between the wire bug and the frame to brake through the paint.

I would not use a GFI receptacle. Some power supplies have a filter capacitor on the input side of the transformer. These capacitor often cause a problem with GFI and trip them on start up. If trailer is properly grounded and the converter is not mounted to metal this is redundancy that may cause you problems and is not covering any portion of the trailer using 120 volts.
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