How To Wire Up My Boat

Corrosion CAUSE prevented, permanently
Corrosion CAUSE prevented, permanently. 8 year guarantee, warranty and support.

Suggested reading:
Marine corrosion prevention here.

SeaBis Master System with How to Prevent Corrosion causes your vessel to be in compliance with the ABYC Wiring Rules.

Comply, and SeaBis Master will indicate Normal. Comply, and you will not cause electrolysis corrosion. Failure to comply may void insurance.

Contact us with SeaBis Master results, and we will step you through How to Wire up Your Boat to prevent 97% of the CAUSE of marine corrosion.

The remaining 3% is Galvanic corrosion. Galvanic corrosion is easily prevented when electrolysis – the 97% – is prevented FIRST. Galvanic corrosion is caused by different metals in very close proximity.  The ONLY instances I know of is a stainless-steel ladder touching an aluminium hull without insulation and stainless steel knobs on aluminium cupboards.   They can be prevented by insulation between the two metals contact points.  At the hull and drive locations, anode/s will prevent galvanic corrosion; when the vast majority cause, electrolysis (stray current) is prevented by SeaBis Master System. 8 years guarantee AND warranty. We supply 8 years free support as CAUSES will reoccur.

© 2003 American Boat & Yacht Council (ABYC) Reference: E-11 

The same physics as were true when these rules were drafted have not changed.  They are hard facts based on physics that have never changed. Manufacturers have changed.  Use SeaBis Master on proposed purchases before you buy.

References to ABYC Wiring Rules:

ABYC Wiring Rules in italics:

The ABYC Wiring Rules are recognised by all authorities, World-wide as per-eminent, correct and legally binding.

ABYC Wiring Rules must be complied with to eliminate the cause of electrolysis (metal corrosion) otherwise your insurance may NOT be valid. If you chose not to eliminate the stray current that is the ONLY cause of electrolysis, you will have no insurance from marine electrolysis or metal corrosion. The critical (paste and copy) excerpts follow and the entire ABYC Wiring Rules via a link at the end of the rules.

The ABYC Wiring Rules are accepted World-wide and form a solid base for insurance companies to accept or refuse claims for electrolysis.

The SeaBis System eliminates the CAUSE of all stray current that is the ONLY  CAUSE of electrolysis.  The SeaBis System complies with ABYC. No additional coating, plating, moving parts or through hole.

ABYC references in italics:

  1. This is rock hard and definite. The Bonding or DC grounding conductor shall not be used as battery negative:

11.5.2.2. DC Grounding Systems and Bonding – A metallic hull, or the bonding and DC grounding systems, shall not be used as a return conductor. (See Figures 9A and 9 B, and Figures 10 A and 10 B, and E-11.18 DC Grounding and Bonding.)

  1. This is rock hard and definite. The DC Grounding conductor must carry no current. Battery negative carries 80% of the battery positive. So, battery negative must not be used for Grounding,

Definitions – Continued that is intentionally maintained at boat ground potential. DC grounding conductor – A normally non-current carrying conductor used to connect metallic non-current carrying parts of direct current devices to the engine negative terminal, or its bus, for the purpose of minimising stray current corrosion.

  1. This is rock hard and definite. Battery negative must be insulated from engine and drive train:

11.16.4.2.2.3. The ungrounded battery cable shall be routed to avoid contact with any part of the engine or drive train.

  1. This is rock hard and definite. Battery negative carries 80% of battery positive current, so must be insulated:

11.17.2.1. Appliances and fixed DC electrical equipment shall be designed so that the current carrying parts of the device are insulated from all exposed electrically conductive parts

  1. This is rock hard and definite. Third wire! The battery negative is not to be used as DC grounding conductor.

11.18.2.2. Routing – The DC grounding conductor shall be routed from the device to the engine negative terminal or the DC main negative bus by one of the following means: 11.18.2.2.1. The DC grounding conductor shall be routed together with the current carrying conductors as a third wire.

  1. This is rock hard and definite. The battery negative is not to be used as DC grounding conductor.

11.18.2.2.2. The DC grounding conductor shall be routed as a separate conductor.

  1. Radio (HF SSB) Ground Plate. We fit a special capacitor (0.47 micro farad, BI-POLAR (NOT electrolytic), rated at 2,000 volts – try Kermit), or battery switch to DC negative, in series with the Tuner / Transceiver connection to the (metal) hull to stop battery negative on the Tuner / Transceiver metal body causing electrolysis. The capacitor allows the Radio to work correctly (pass AC while stopping DC).

11.18.2.7. Radio Ground Plate – If the radio ground plate is connected to the engine negative terminal, the connecting conductor shall meet the requirements of ABYC E-4, Lightning Protection, since a radio ground plate may also function as a lightning ground plate.

 

DC (battery) current in AC (shore power):

In a lifetime of defeating corrosion, I have never known shore (AC) power to be a cause of stray current that causes electrolysis.  IF shore power were to generate DC (battery power) every appliance powered by AC would incinerate in a few seconds. The reason is DC does not generate Counter-electromotive force (Back EMF or CEMF). Therefore, an infinite current flows, causing instant burn out.

Link: Wikipedia CEMF – back EMF

IF there were DC in the Shore or inverter or generator power, SeaBis Master WILL flash Critical (red).

 

 
To test shore power for DC (stray current / battery power): 

First, with shore unplugged, get the entire boat to Normal then plug in the shore. SeaBis Master will immediately indicate either no stray current, Normal or DC (stray current) as Red.

 
Galvanic corrosion.  The 3% of all corrosion:

Natural inter-metal voltage differences that would otherwise cause galvanic corrosion can be vastly reduced by use of anodes and bonding.  Bonding is small wire around the inside of the hull connected to anode conductive mounting bolts that themselves make a good contact to the metal (hull/prop shaft/etcetera).  So, the natural inter-metal voltage differences are reduced, and the anodes are sacrificed rather than your metal.

 
Link to ABYC Wiring Rules. © 2003 American Boat & Yacht Council (ABYC) Reference: E-11
The same physics as form the basis for these Wiring Rules were true when I first went to sea in 1964 as they are today.

Glen Bishop of SeaBis
Preferred contact as it gives me time to think: [email protected]
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