Where Do I Ground???
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=1311
Printed Date: December-04-2024 at 9:43pm
Topic: Where Do I Ground???
Posted By: Bradley950
Subject: Where Do I Ground???
Date Posted: March-09-2005 at 9:55pm
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I am putting a new system in my old boat which never had one. Where would you ground amps and the head unit. Back to the negative terminal???? Where is the best grounding point for these components??? -Brad- Its a 76 ski nautique. ------------- Brad Miller bradley950@yahoo.com |
Replies:
Posted By: Guests
Date Posted: March-10-2005 at 1:27am
| What type and year engine? |
Posted By: 882001
Date Posted: March-10-2005 at 11:25am
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yes to the neg terminal.
------------- kemah texas http://www.correctcraftfan.com/diaries/details.asp?ID=163&yrstart=1986&yrend=1990 - 1988 skinautique "2001" |
Posted By: Tim D
Date Posted: March-10-2005 at 12:09pm
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Yeah the neg terminal, and check your spark plugs.(resistor type for noise) ------------- Tim D |
Posted By: Jim_In_Houston
Date Posted: March-10-2005 at 4:58pm
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I checked mine. My spark plugs are positively and without a doubt gounded. ------------- Happy owner of a '66 and a '68 Mustang |
Posted By: captan1
Date Posted: March-10-2005 at 5:01pm
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There's more printed about grounding marine electrical systems than all other aspects. I don't make it a practice to add any ground wires to the battery because off the corrosion factor, the best thing to do in my opinion is add a negative ground bus bar close to the engine and connect the neg cable from the battery to this and run all the ground wires from this. I run the engine ground, ignition ground and dash ground to this point, also the gas tank ground. I ground the engine to the head and have a ground cable from the head to the other head in the rear of the motor, I even ground the choke to the bus bar, thats called a star ground, all points to one ground.
------------- http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique |
Posted By: Bradley950
Date Posted: March-10-2005 at 10:20pm
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My boat is a 76 Ski Nautique. I like the way that star ground sounds. Thanks captan1
-Brad- ------------- Brad Miller bradley950@yahoo.com |
Posted By: curbsidegold
Date Posted: March-11-2005 at 7:23pm
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Hey captan1 ... a question about grounding the gas tank? My tank was previously connected to the engine by copper tube, so I figure it was grounded to the engine and then on to the bus bar from there. I replaced the copper with a newer flexable (non metal) fuel line. Should I consider running a ground from the tank directly to the bus bar??
------------- sm |
Posted By: nates78ski
Date Posted: March-11-2005 at 9:36pm
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run that ground to the buss bar, but you might want to add a small buss in the rear of the boat. also do not forget to ground that fuel tank filler neck if it has a rubber hose connecting it to the fuel tank ------------- Nathan http://correctcraftfan.com/diaries/details.asp?ID=1463&sort=&pagenum=3&yrstart=1978&yrend=1978" rel="nofollow - My '78 Ski Nautique <a href="http://photobucket.com/Nates78ski" rel="nofoll |
Posted By: captan1
Date Posted: March-12-2005 at 3:26am
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Well guy's, the fuel sender needs a ground, I've never seen the fuel tubing acting as a ground but I haven't seen everything.
I guess if you wanted to cut down on wires you could add a neg. bus bar back there, couple of grounds for the gas tank, rear light needs a ground and only one wire up to the engine bus bar. Good point about the filler neck, I don't think mine is grounded, used for static type of situation? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique |
Posted By: 66polyhead
Date Posted: March-13-2005 at 2:43am
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The only problem I see with the copper gas line I have found, is: vibration. My 66 had a copper gas line feed to the pump. It eventually developed a vibration, stress crack, and started leaking. I replaced it with aircraft, poly hose, from the tank, to the fuel pump. Of course, electricity seeks the best path to Earth, or ground. The negitive side of the battery is grounded to the rear of the motor block! All gauges are wired in series from the block. I'm a dinosaur, so I don't have a stereo. My advise to you would be: run a #6 braided ground wire to the front of your boat for your stereo, amp whatever. run a # 10 braided ground for the speakers, wolfer, etc.. As for the fuel neck... the last time I checked, it's a boat, not a helocopter, I don't need a static ground. Check out page 21 of the Mercruiser manual!!! Page 22 might clear things up!! ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=220&yrstart=1925&yrend=1970" rel="nofollow - KY Wildcat |
Posted By: Guests
Date Posted: March-15-2005 at 12:50pm
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Here is the uscg regs for fuel system grounding
[Code of Federal Regulations] [Title 33, Volume 2] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR183.572] [Page 857] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 183--BOATS AND ASSOCIATED EQUIPMENT--Table of Contents Subpart J--Fuel Systems Sec. 183.572 Grounding. Each metallic component of the fuel fill system and fuel tank which is in contact with fuel must be statically grounded so that the resistance between the ground and each metallic component of the fuel fill system and fuel tank is less than 100 ohms. Tests Just thought you like to know. Any other question reguarding USCG specs chech this site http://cfr.law.cornell.edu/cfr/cfr.php?title=33&type=part&value=183 |
Posted By: Bradley950
Date Posted: March-15-2005 at 5:46pm
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Wow nice reserch!!! Thanks to all -Brad- ------------- Brad Miller bradley950@yahoo.com |
Posted By: captan1
Date Posted: March-15-2005 at 7:05pm
I might have a couple extra.... Who wants to buy an ohm? ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=452&sort=&pagenum=1&yrstart=1978&yrend=1978 - 1978 Ski Nautique |
Posted By: Jim_In_Houston
Date Posted: March-15-2005 at 9:25pm
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I'm looking for a 3 bedroom ohm with an attached garage. ------------- Happy owner of a '66 and a '68 Mustang |
Posted By: curbsidegold
Date Posted: March-16-2005 at 1:25am
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Thanks ohm boyz!!
So my next question is what's the best way to secure a braided ground wire to the fuel tank? My tank is the original steel cylinder type tank, holds about 15 gallons. It has three female threaded fittings 1. top center threaded opening 2" to accomodate filling up the tank, 2. top right - threaded opening fits a brass fitting that connects to the fuel line, and 3. bottom threaded 1/2" opening that holds drain plug. Should I use a compression strap to secure the ground wire to one of these fittings? Another option might be connecting the ground to the galvanized steel staps holding the tank in its seat, but at the moment, I have rubber gasket material between the tank and straps to cut down on vibration ... it seemed like the right thing to do at the time, but may be overkill. SM ------------- sm |
Posted By: Guests
Date Posted: March-16-2005 at 10:48am
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You could simply attach a ground wire to the filler neck using a hose clamp then connect it to your ground source(buss bar, etc...).
These USCG reg apply to boats the year in which it was built. So in reality if your boat is old these may not apply. But grounding for static charge is not a bad idea. The wire for attachment does not need to be "braided wire", but can be just stranded copper wire like you would for any other connection. A 14 or 16 ga wire is good. |