BigSkiff02
Member
Morning Troops! This be my 1st post on this Blog, so be gentle...lol...
Will try to keep this query as concise as possible..!
My Background: Old retired DOD civil servant, 40+ years experience with Comms Systems & AC Distribution, SHORE BASED ONLY, NEVER worked on Boats/Ships etc
My son buys this old semi-derelict, approx 40 yr old Cheoy-Lee 55' Long Range Cruiser & I was 'volunteered' to rewire it...
The Boat will have Shore Power hookup as well as onboard Onan 12KW 2-Phase Generator...
Trying to stay within ABYC E-11 as much as possible...
E-11, as well as other specs, state that all AC Neutrals (da White wire) shall be 'bonded' to the Safety Ground (da Green wire) ONLY at the power source. That means on-shore somewhere in case of Shore Power, and at the Generator itself in case of Shipboard power..
We want a scenario where we can use both Shore Power and Generator Power at the same time.
Our single Green-Ground bus will leave the boat thru a Galvanic Isolator.
I can very easily keep the 2 Neutrals separate on the boat, but what worries me is the Green-Ground bus. It is not unusual to
have a few volts on Neutral, especially 2-phase 240/120...
Therefore you could have an AC voltage difference between the 2 Neutrals at the points where they each 'bond' with Green-Ground ,
which could result in residual AC current on the Green Bus, which is UNGOOD.....
We will also have a 'Master Ground' point on the 'Engine Block', where we will 'tie together': Green Bus, DC Negative (da Yellow wire);
'Ships Ground' (Sea Cocks, 'Zincs', Onan Frame, etc)
So I guess my question is: Has anybody out there in 'Boat Land' got any ideas or tried this before....
Signed: Frustrated Louisiana Landlubber...
Will try to keep this query as concise as possible..!
My Background: Old retired DOD civil servant, 40+ years experience with Comms Systems & AC Distribution, SHORE BASED ONLY, NEVER worked on Boats/Ships etc
My son buys this old semi-derelict, approx 40 yr old Cheoy-Lee 55' Long Range Cruiser & I was 'volunteered' to rewire it...
The Boat will have Shore Power hookup as well as onboard Onan 12KW 2-Phase Generator...
Trying to stay within ABYC E-11 as much as possible...
E-11, as well as other specs, state that all AC Neutrals (da White wire) shall be 'bonded' to the Safety Ground (da Green wire) ONLY at the power source. That means on-shore somewhere in case of Shore Power, and at the Generator itself in case of Shipboard power..
We want a scenario where we can use both Shore Power and Generator Power at the same time.
Our single Green-Ground bus will leave the boat thru a Galvanic Isolator.
I can very easily keep the 2 Neutrals separate on the boat, but what worries me is the Green-Ground bus. It is not unusual to
have a few volts on Neutral, especially 2-phase 240/120...
Therefore you could have an AC voltage difference between the 2 Neutrals at the points where they each 'bond' with Green-Ground ,
which could result in residual AC current on the Green Bus, which is UNGOOD.....
We will also have a 'Master Ground' point on the 'Engine Block', where we will 'tie together': Green Bus, DC Negative (da Yellow wire);
'Ships Ground' (Sea Cocks, 'Zincs', Onan Frame, etc)
So I guess my question is: Has anybody out there in 'Boat Land' got any ideas or tried this before....
Signed: Frustrated Louisiana Landlubber...