Difference between revisions of "Bonding system (task)"
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| + | == Task Specification == | ||
| + | |||
| + | === New Primary Bonding Conductor Needed === | ||
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The '''primary bonding conductor''' is a copper wire that runs from the stern to the bow along the bottom of the boat. This wire is badly corroded in some parts and should be replaced anyway by a much bigger wire. Ideally, it should be able to carry as much current as the starter motor cables. | The '''primary bonding conductor''' is a copper wire that runs from the stern to the bow along the bottom of the boat. This wire is badly corroded in some parts and should be replaced anyway by a much bigger wire. Ideally, it should be able to carry as much current as the starter motor cables. | ||
| − | All stanchions, shrouds, stays, pulpits, and the mast should be directly connected to the primary bonding conductor, preferably by very big wires. There should be a metal '''ground plate''' on the exterior of bottom of the boat that is also connected to the primary bonding conductor. | + | === Lightning Protection === |
| + | |||
| + | All stanchions, shrouds, stays, pulpits, and the mast should be directly connected to the primary bonding conductor, preferably by very big wires. There should be a metal '''ground plate''' on the exterior of bottom of the boat that is also connected to the primary bonding conductor. Ideally, the electrical path between the mast and the ground plate should be short, through very heavy gauge wire, and should have no turns. | ||
| + | |||
| + | === Galvanic Protection === | ||
In addition, to prevent galvanic corrosion the following items should be connected to the primary bonding conductor: | In addition, to prevent galvanic corrosion the following items should be connected to the primary bonding conductor: | ||
| + | * Engine | ||
* Fuel tanks | * Fuel tanks | ||
* Rudder (because of its connection to the autonav system) | * Rudder (because of its connection to the autonav system) | ||
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All bonding conductors should be either bare wire, or colored green. | All bonding conductors should be either bare wire, or colored green. | ||
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| − | |||
The following things should all be connected together at ''one point only'', referred to as the '''engine negative terminal''': | The following things should all be connected together at ''one point only'', referred to as the '''engine negative terminal''': | ||
* the primary bonding conductor | * the primary bonding conductor | ||
| − | |||
* the engine block | * the engine block | ||
* the negative terminals of all batteries | * the negative terminals of all batteries | ||
| + | |||
| + | === Shore Power Grounding === | ||
| + | |||
| + | Please note that the grounding conductor of the 110v shore power system '''MUST NOT''' be connected to the bonding system unless a [[galvanic isolator]] or [[isolation transformer]] is in place. | ||
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| + | == Status June 7, 2008 == | ||
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| + | A 50-foot-long #4 AWG solid copper wire has been run the length of the ship. It has been primed and painted green to help prevent against corrosion. This new primary bonding conductor has been bolted to the ship's stem fitting which connects to the forestay. It has not yet been connected at the stern of the ship. | ||
| + | |||
| + | It has been decided that the prop strut will make an effective ground plate for galvanic protection. | ||
| + | |||
| + | A heavy gauge wire will connect directly between the mast and the nearest keel terminal bolt. The keel itself will act as a ground for lightning protection. | ||
| + | |||
| + | == To Do == | ||
| + | |||
| + | * Mount the new primary bonding conductor to the underside of the floorboards (keep it out of the bilge) | ||
| + | * Trim the the primary bonding conductor to the correct length and attach it to the backstay. | ||
| + | * Connect the engine negative terminal to the primary bonding conductor | ||
| + | * Connect the prop strut bolts to the primary bonding conductor | ||
| + | * Connect the Mast to the nearest keel terminal bolt | ||
| + | * Connect both keel terminal bolts to the primary bonding conductor | ||
| + | * Connect the shroud chainplates to the to the primary bonding conductor | ||
| + | * Connect the electric bilge pump chassis to the primary bonding conductor | ||
| + | * Connect the rudder/autonav system to the primary bonding conductor | ||
| + | * Connect the fuel tank to the primary bonding conductor | ||
| + | * Connect the water heater to the primary bonding conductor | ||
| + | * Diagnose shore power connection to make sure ground is isolated | ||
[[Category:Maintenance Tasks]] | [[Category:Maintenance Tasks]] | ||
Revision as of 04:50, 7 June 2008
Contents
Task Specification
New Primary Bonding Conductor Needed
The primary bonding conductor is a copper wire that runs from the stern to the bow along the bottom of the boat. This wire is badly corroded in some parts and should be replaced anyway by a much bigger wire. Ideally, it should be able to carry as much current as the starter motor cables.
Lightning Protection
All stanchions, shrouds, stays, pulpits, and the mast should be directly connected to the primary bonding conductor, preferably by very big wires. There should be a metal ground plate on the exterior of bottom of the boat that is also connected to the primary bonding conductor. Ideally, the electrical path between the mast and the ground plate should be short, through very heavy gauge wire, and should have no turns.
Galvanic Protection
In addition, to prevent galvanic corrosion the following items should be connected to the primary bonding conductor:
- Engine
- Fuel tanks
- Rudder (because of its connection to the autonav system)
- Bilge pump metal housing
- Metal chassis of other equipment
All bonding conductors should be either bare wire, or colored green.
The following things should all be connected together at one point only, referred to as the engine negative terminal:
- the primary bonding conductor
- the engine block
- the negative terminals of all batteries
Shore Power Grounding
Please note that the grounding conductor of the 110v shore power system MUST NOT be connected to the bonding system unless a galvanic isolator or isolation transformer is in place.
Status June 7, 2008
A 50-foot-long #4 AWG solid copper wire has been run the length of the ship. It has been primed and painted green to help prevent against corrosion. This new primary bonding conductor has been bolted to the ship's stem fitting which connects to the forestay. It has not yet been connected at the stern of the ship.
It has been decided that the prop strut will make an effective ground plate for galvanic protection.
A heavy gauge wire will connect directly between the mast and the nearest keel terminal bolt. The keel itself will act as a ground for lightning protection.
To Do
- Mount the new primary bonding conductor to the underside of the floorboards (keep it out of the bilge)
- Trim the the primary bonding conductor to the correct length and attach it to the backstay.
- Connect the engine negative terminal to the primary bonding conductor
- Connect the prop strut bolts to the primary bonding conductor
- Connect the Mast to the nearest keel terminal bolt
- Connect both keel terminal bolts to the primary bonding conductor
- Connect the shroud chainplates to the to the primary bonding conductor
- Connect the electric bilge pump chassis to the primary bonding conductor
- Connect the rudder/autonav system to the primary bonding conductor
- Connect the fuel tank to the primary bonding conductor
- Connect the water heater to the primary bonding conductor
- Diagnose shore power connection to make sure ground is isolated
