New Ground to Bus |
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td_in_nc
Senior Member Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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Posted: April-11-2020 at 9:55pm |
Trying to deal with a some Perfectpass issues and one of the things recommended is a good ground. If a ran a new ground from the bus to the motor with 6 gauge wire would that be acceptable? I saw some post which said run a new ground from bus to battery, but I think running directly from bus to engine ground would be better, am I missing something?
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Far north downunder
Newbie Joined: May-11-2018 Location: Australia Status: Offline Points: 37 |
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Most people are running the new ground to the engine, not sure what is better. If the issue is not fixed you may need to upgrade the positive feed from the engine to the dash. I just upgraded the feeds from the ignition breakers to the key, and ground to the engine and it fixed my PP issues.
6 gauge should be fine, most people are using 8 gauge for the ground upgrade. |
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1994 SNOB
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10652 |
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Seems to me that it doesn't make any difference whether you go to the engine or the battery with your new ground wire.
One way might use a longer wire than the other One way might be easier to run the wire and attach it. Sounds like a personal preference type of thing. Why do you think it's better going to the engine? |
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Very good question. Is closer to the alternator better or closer to the battery. Cast iron isn't the best conductor of electricity. As a compromise, I'd go to the same spot on the engine block where the negative battery cable is connected. |
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KENO
Grand Poobah Joined: June-06-2004 Location: United States Status: Offline Points: 10652 |
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I think I answered my own question
Here's a semi long read in the link below that would suggest the block is best And...........the original ground point for the dash is the block when you follow that black wire backwards from the dash. link |
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td_in_nc
Senior Member Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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Thanks everyone - I ran it back to block where the ground for the battery was connected - I figured it was less connections to the place the battery grounds, It may be bad logic but it is done now. I will check out the link.
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td_in_nc
Senior Member Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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After reading the article, I now have another question, should I remove the original ground from the busfuse bar, All I did was add in the new ground, now I am wondering if I should have removed the original ground wires which were there, before adding the new ground.
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8122pbrainard
Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41040 |
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Tom, You are fine as is. The extra wire doesn't create a ground loop. (see the article). In wiring, it's very common to run multiple conductors when amps are high and it's not feasible to run one large conductor. Many times it's even easier to run multiple. |
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td_in_nc
Senior Member Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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Thanks Pete - You nailed my concern about the ground loop.
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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And I thought a ground loop was bad tail dragger landing!
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Jonny Quest
Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Online Points: 2843 |
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A ground loop on landing is an ugly thing! |
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Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
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td_in_nc
Senior Member Joined: March-30-2012 Location: Clayton NC Status: Offline Points: 381 |
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Okay I looked it up and I cannot find out what ground loop means related to skiing. Someone has to explain....
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tryathlete
Platinum Member Joined: April-19-2013 Location: Lake Villa, IL Status: Offline Points: 1797 |
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In case of sarcasm, my apologies. A ground loop as it relates to flying a plane is essentially wipe out when you swap ends with a tail wheel airplane when landing. It can be a minor embarrassment all the way to a nasty crash. I flew a Turbo Beaver floatplane that subsequently (a few years later) was water-looped but fortunately the engine did not ingest water. It was much cheaper to repair as a result. That was a very cool plane. It still is. |
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