120/240 VAC wiring diagram with transformer request

[krush]

Can somebody please post up a scan or picture of their Hatt AC wiring diagram that is 120/240 that includes an isolation transformer. I just want to see how the factory did it for some ideas.

I'm specifically looking for shore power and generator connections to the main panels. I don't need wiring from the panel circuit breakers to each appliance/plug.

 

[SKYCHENEY]

Can somebody please post up a scan or picture of their Hatt AC wiring diagram that is 120/240 that includes an isolation transformer. I just want to see how the factory did it for some ideas.

I'm specifically looking for shore power and generator connections to the main panels. I don't need wiring from the panel circuit breakers to each appliance/plug.

Krush,
I'll be on my boat this weekend. I'll take a few pics of the schematics and post them or text them to you.

 

[Boatsb]

Keep in mind the 41c of that era did not have 240 volt systems

 

[SKYCHENEY]

Keep in mind the 41c of that era did not have 240 volt systems

But he's a smart young whipper snapper. He'll figure it out.

 

[krush]

Keep in mind the 41c of that era did not have 240 volt systems

No shit, I didn't know!

 

[SEVEN]

Krishna, I looked up your profile to see which Hatt you own. It shows not currently an owner. What size and year do you have? I didn't want to do a lot of research for the wrong info.

 

[Boatsb]

My point was more to reinforce that there will not be an easy way to add it to his boat.

 

[SEVEN]

Krush, sorry spell check.

 

[krush]

Krishna, I looked up your profile to see which Hatt you own. It shows not currently an owner. What size and year do you have? I didn't want to do a lot of research for the wrong info.

41c, but as I said, I just want some schematics from any hatteras with a 120/240 system that INCLUDES an isolation transformer. I think SkyCheney has me taken care of, but the more schematics, the better.

My point was more to reinforce that there will not be an easy way to add it to his boat.

It has two 30amp plugs with each going to a different distribution panel (one was added during the refit). Wouldn't be too hard to do some magic and add a small 2 pole 240v panel with a few circuits. And remember, I'm adding a transformer.

 

[dottieshusband]

Hope your eyes are much better than mine!

 

[dottieshusband]

It's 4 corners

 

[krush]

Awesome. Thanks for posting. I appreciate all other posting up theirs as well.

Another question: Does the shorline selector switch only allow one of the three outlets to be selected at a time?

 

[SKYCHENEY]

Awesome. Thanks for posting. I appreciate all other posting up theirs as well.

Another question: Does the shorline selector switch only allow one of the three outlets to be selected at a time?

If its like mine, then yes. The shore lines go to breakers with a slide so only one inlet can be selected at a time. I'll take some pics of the panel so you can see how it matches up to the schematic.

 

[dottieshusband]

Likewise on mine. There are 2 rotary switches, each with 3 options..1p, 1s, 2p, 2s, and 3p, 3s ..1 is the top 50, 2 is the bottom 50, and 3 is the 120v...P is port, S starbord..so I think I could do a 50 on one side and 50 on the other...but lextricy is my weakest link! I can tell you that those rotary switches are about $850 each, and a true bear to swap out!

 

[nautibake]

Likewise on mine. There are 2 rotary switches, each with 3 options..1p, 1s, 2p, 2s, and 3p, 3s ..1 is the top 50, 2 is the bottom 50, and 3 is the 120v...P is port, S starbord..so I think I could do a 50 on one side and 50 on the other...but lextricy is my weakest link! I can tell you that those rotary switches are about $850 each, and a true bear to swap out!

Just curious, do our old isolation transformers (mine is circa 1977) meet the current ABYC standard: section A-28 of the Standards and Technical Information Reports for Small Craft? I was just researching and came across this seemingly more stringent standard.

 

[krush]

Just curious, do our old isolation transformers (mine is circa 1977) meet the current ABYC standard: section A-28 of the Standards and Technical Information Reports for Small Craft? I was just researching and came across this seemingly more stringent standard.

Not sure, but here's a good article about isolation vs polarization transformers on boats http://www.iamimarine.org/iami/IAMI_OCT06.pdf

 

[nautibake]

Not sure, but here's a good article about isolation vs polarization transformers on boats http://www.iamimarine.org/iami/IAMI_OCT06.pdf

Thanks krush - very helpful for learning the basics. Looks like an excellent pub overall. Much appreciated...

Jerry

 

[krush]

Thanks krush - very helpful for learning the basics. Looks like an excellent pub overall. Much appreciated...

With that said, connecting the grounds like in a polarization configuration kind of defeats the purpose of the transformer. Really, what needs to happen is some sort of ground fault protection at the dock-side. A GFCI supplying the transformer solves all the safety concerns. Also, if the boat has a transformer, it's less likely to have nuisance trips of a GFCI due to wiring issues aboard (since the transformer isolates the two systems)...more info on that here: http://www.samsmarine.com/forums/sh...-Marinas-especially-fresh-water.-Ground-Fault

A GFCI, simple terms, makes sure all the electricity (current) that goes out one wire, comes back the other wire.