Bonding

jsbraga · Oct 12, 2019

The images show the bonding strip on both sides of our boat. My concern is the port side looks like it’s been damaged, maybe by stuff stored in the lazarrette slamming against it. The zincs appear to be doing their job and have been replaced once by myself since buying the boat. It has spent at least 9 months on the hard in the 2 years I have owned her. Comments.

RT Firefly · Oct 12, 2019

Greetings,
Mr. js. Sorry. Maybe not enough coffee this morning but I only see some corrosion in the top picture which, if not right through the strip is cosmetic only. And which is which? Port/starboard? Is the first picture side ways? Difficult to figure out orientation and location...More coffee...

jsbraga · Oct 12, 2019

RT Firefly said:
Greetings,
Mr. js. Sorry. Maybe not enough coffee this morning but I only see some corrosion in the top picture which, if not right through the strip is cosmetic only. And which is which? Port/starboard? Is the first picture side ways? Difficult to figure out orientation and location...More coffee...

The 1st image is from the port side and is vertical. The 2nd is from the starboard side and also vertical. Do I go for my 3rd cup???

C lectric · Oct 12, 2019

The straps look like brass flat strips.

Unless the straps are actually broken then continuity will remain regardless of appearance or any dings or dents.

THe corrosion showing should not matter UNLESS any connections where bonding wires are secured are corroding or are loose. In that case it should simply be mtc. needed.

Remove those with problems, clean them up including the strap at that point and apply a dielectric compound, Silicone grease, or a product like NoAlox.

Then test for any resistance across the connection.

The green verdegris on the strip surface won't matter.

Comodave · Oct 12, 2019

I agree. I might have to clean off the chunks of corrosion just because of my OCD but the chunks won’t hurt. Check for continuity with less than 1 ohm.

jsbraga · Oct 13, 2019

Mtc?

What does MTC mean?

C lectric said:
The straps look like brass flat strips.

Unless the straps are actually broken then continuity will remain regardless of appearance or any dings or dents.

THe corrosion showing should not matter UNLESS any connections where bonding wires are secured are corroding or are loose. In that case it should simply be mtc. needed.

Remove those with problems, clean them up including the strap at that point and apply a dielectric compound, Silicone grease, or a product like NoAlox.

Then test for any resistance across the connection.

The green verdegris on the strip surface won't matter.

Pete Meisinger · Oct 13, 2019

My boat has a combination of fairly heavy insulated copper wire and some strips which I assumed were copper but could be brass for bonding. Is this acceptable ? What is the difference between bonding and grounding ?

I am in fresh water so it may not be as important but I am still confused.

Maybe I should open a new thread but this one seems pretty close.

pete

Comodave · Oct 13, 2019

jsbraga said:
What does MTC mean?

Where did that come in at?

Comodave · Oct 13, 2019

Pete Meisinger said:
My boat has a combination of fairly heavy insulated copper wire and some strips which I assumed were copper but could be brass for bonding. Is this acceptable ? What is the difference between bonding and grounding ?

I am in fresh water so it may not be as important but I am still confused.

Maybe I should open a new thread but this one seems pretty close.

pete

Bonding is to prevent corrosion by tying all the underwater metals to your anodes. Grounding is a safety ground so that if there stray electrical current it will be conducted to ground and not to your body or the water.

jsbraga · Oct 13, 2019

Mtc.

Comodave said:
Where did that come in at?

THe corrosion showing should not matter UNLESS any connections where bonding wires are secured are corroding or are loose. In that case it should simply be mtc. needed

Tuttouomo · Oct 13, 2019

Maintenance.

jsbraga · Oct 13, 2019

What maintenance is suggested? Any help is appreciated. [emoji41]

Comodave · Oct 13, 2019

Just cleaning up the connections. Maybe put an ohm meter on the connections and check for resistance, should be less than 1 ohm.

C lectric · Oct 13, 2019

mtc. Yes, maintenance but I added to the lack of clarity by missing the 'E'
Should have been mtce.

78puget-trawler · Oct 13, 2019

That wouldn't have helped either. Maint. would be the most easily understood abr. for maintenance, in proper context of course.

Bonding

jsbraga

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RT Firefly

Enigma

jsbraga

Senior Member

C lectric

Guru

Comodave

Moderator Emeritus

jsbraga

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Pete Meisinger

Guru

Comodave

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Comodave

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jsbraga

Senior Member

Tuttouomo

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jsbraga

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Comodave

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C lectric

Guru

78puget-trawler

Guru

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