| [GMCnet] Buzz Box Replacement Ground wire [message #212760] |
Sat, 29 June 2013 16:29  |
mmmm ka
Messages: 45
Registered: May 2012
Karma: 0
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Hi folks,
Replacing the original buzz box with a Progressive Dynamics PD9260. The original buzz box uses chassis ground for its (-) negative leg and hooks its (+) to the house fuse panel.
The Progressive Manual says:
"CAUTION RISK OF FIRE:"
" Chassis bonding wire must be a separate wire ran directly from the Grounding Lug provided on the converter. DO NOT connect Output Negative to chassis using the same wire."
So this sounds to me like they want a separate wire from the ground lug of the charger/converter to the motorhome chassis in addition to a wire from Output Negative on the charger/converter.
Is it OK to use the original buzz box negative cable connected to the Output Negative terminal on the PD 9260 and run a separate cable to chassis for the ground lug ? Or would it be preferable to run another cable from the house battery(s) to the Output Negative terminal and use the existing chassis ground cable to the PD 9260 ground lug ??
PD9200 PD9200
(+) --------------> fuse block (+) --------------> Fuse block
(-) ----------------> Chassis -or- (-) ---------------> Battery (-) terminal
(ground lug) ----> Chassis (Ground lug)------> Chassis
Thanks and best regards,
Mark Kasiewicz
'77 Kingsley
Eau Claire, WI
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| Re: [GMCnet] Buzz Box Replacement Ground wire [message #263655 is a reply to message #212760] |
Tue, 07 October 2014 04:02  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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The master ground is the aluminum body of the coach.
Run BOTH cables (ground and -12 volt) to the Aluminum body of the coach.
Run positive to the un-fused side of the fuse box. It is assumed that there is an another (OEM) positive cable on the same fuse box connection that runs from there on to the battery and boost relay of the coach.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Buzz Box Replacement Ground wire [message #263667 is a reply to message #212760] |
Tue, 07 October 2014 07:04 |
mickey szilagyi
Messages: 273
Registered: January 2013
Karma: 0
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Senior Member |
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We installed a PD9260 on the back wall of the electric closet. We couldn't loosen the ground screw that the buz box was grounded to so we cut the main ground to the buz box just behind the buz box. We left enough on the buz box in case we wanted to connect another ground to it to use as a bench 12V source. We had enough of the old ground cable to attach to the PD9260. We ran the second ground from the PD9260 to another screw right next to the old ground on the aluminum ground plate. We drilled a new hole for this new ground. Didn't make sense to have to run the second ground like that but we did anyway as the instructions stated. We've had this working since last year and everything has been working perfectly. Make sure you put dielectric grease on all the connections and clean them up before you do.
http://www.gmcmhphotos.com/photos/g6410-new-pd9260-converter.html
Mickey
1977 Kingsley, 403, Lansing, MI
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