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Go Back   SailNet Community > On Board > Gear & Maintenance > Grounding strips
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Topic Review (Newest First)
10-31-2011 12:35 PM
kd3pc
Quote:
Originally Posted by Kwasiemoto View Post
Currently, bounded to all thru hulls, strut, rudder, copper screen in bedded it hull, Icon 120 tuner, and keenwood ts340t radio.
You need to do some research...the counterpoise is not meant to be a bonding system or voltage sink for non radio stuff...if you are seeing a spark - there is something amiss..ground loop? or something feeding that tape? Stray current from shore power or mis wired boat near by....

I would not attach it, until you find the source...you are asking for galvanic issues...and damage to electronics...

YMMV, and I am sure others will post...
10-31-2011 12:03 PM
Kwasiemoto Currently, bounded to all thru hulls, strut, rudder, copper screen in bedded it hull, Icon 120 tuner, and keenwood ts340t radio.
10-28-2011 11:57 AM
mitiempo What is the strip attached to besides the thru hull?
10-28-2011 11:27 AM
Kwasiemoto I have just installed a 2" copper tape for my HF radio, and just as I started to make the connection to the thru hull, I noticed a small yellow spark. I mesured the ciurrent and found it to be fluctuating , but seemed to be around .68 volts. I hope someone has a explanation for why this has occured. There is no power going to this tape.
08-13-2011 08:06 PM
brokesailor I do have an SSB Radio though I have not been able to get it to receive anything. I guess the copper strips go from it up to the thruhulls at the companionway. I guess I need to dive behinfd the engine and do some more scoping out. I am just surprised that nothing is connected to the grounding plates.
08-13-2011 07:22 PM
kd3pc most likely a counterpoise for an SSB or Ham radio rig...tape/foil is of no use in bonding for the long term..

YMMV
08-13-2011 05:17 PM
fairbank56 Ah, but the water going through that seacock is conductive and therefore a stray current path may very well be provided through that less than desirable "connection". Better to have a good clean solid wired connection than not? There may also be a current path on the inside of the hull because of moisture on the inside of the hull. Not saying I'm for or against bonding but there are pro's and con's to both sides.

Eric
08-13-2011 03:47 PM
mitiempo The problem with bonding all underwater metal is that seacocks are all of one metal and don't really need protection. In today's marinas with both AC power on boats and shorepower everywhere, not always in good condition, this invites the seacocks into an electrical mix that can cause problems they don't have if not bonded.
The link posted above to an article by Stan Honey explains it very well. Here it is again. Grounding
08-13-2011 02:16 PM
fairbank56 Copper strap is a very poor choice for a bonding system if you so choose to have one. Since the copper straps go to the aft section of your boat and aren't connected to anything there, it's likely that there was an HF antenna tuner there at one time that the straps would have been connected to. Bonding is a controversial subject. It's use has to do with managing destructive galvanic and stray currents. The term, "electrolysis", while commonly used, is a misnomer in this regard.

Eric
08-13-2011 02:04 PM
bandaidmd Grounding

heres some reading material
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