Tuesday, November 4, 2014

[Electric Boats] Re: Electric 220 to 110 volt Conversion question

 

http://m.campingworld.com/shopping/item/110v-electrical-power-outlet-box-30-amp/20811

You need to install a 30a breaker in your power distribution panel, then a proper 30a receptacle fed from the breaker with appropriately sized wire. The sum total current rating should not exceed your main breaker. No, don't try to use one leg of a 220v circuit. It won't give you anything but trouble. You really need to have a licensed electrician come in and do it. It is probably illegal for you to do this yourself and an electrician will do everything to code and give you a safe installation.

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Re: [Electric Boats] Electric 220 to 110 volt Conversion question

 



Short answer is yes, but there are stipulations...
If the 26.+ amp welder is 220/240 (really the same), then you will need to make sure the wiring is up to the task and you have outlets that each use an opposite leg if the 220/240 and both use the neutral of that circuit.  The HFT welder is going to need a 15-20 amp supply.  Each welder outlet should have its own disconnect between the 220/240 line and the respective outlet.  All this being said, you should check with a good electrician that knows the current NEC.  Although some things are functional, there are engineers and bureaucrats that will say otherwise.  I have been an electrician but am not current on the code.
Dan
 
----- Original Message -----
Sent: Tuesday, November 04, 2014 10:05 AM
Subject: [Electric Boats] Electric 220 to 110 volt Conversion question

 

I have a question for the group.


In boats sometimes I need to have clean welding done, so i bought a Harbor freight 20 amp MIG wire feed welder ( 60 to 120 amp out).   A friend also gave me an older Dayton brand 26.6 amp input  "buzz box" welder (100 amps out) that both run on 110 volt AC wall plug type input.  Can they be run, one at a time, from a single 220 v. washer / dryer box circuit??  


 I don't think that using the house 110 volt would be safe, not so good for my older home wiring in the country.   The buzz box I will hope to use with magnesium rod,.mostly for steel sheet cutting.  The wire feed machine for building  stuff.  I have a good gas welder/cutter now, but like the MIG option.


I have an extra 220 clothes dryer plug, that might work if I could convert it to 110 safely.  Is there a plug, or a power changing box, with an extension cord, that can go from the 220v to a single leg 110, without having a wiring rework to do ??  Probably some others here have done this change. 


Thanks,  Cal

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Respectfully,
Dan Hennis
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Posted by: "Dan Hennis" <dhennis@centurytel.net>
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[Electric Boats] Re:Trolling motor for small DIY bow thruster?

 

Consider disconnecting the power completely before the motor.  Stray salt water or other currents can do damage to aluminum Minn Kota Motors.  One of mine has the rear shell ring corroded in short order.  I had the battery off, but I think there was residual current at work.  A sudden appearance on a $400 dollar motor, ouch.


Thanks,  Cal 

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Posted by: h20dragon@centurytel.net
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[Electric Boats] Electric 220 to 110 volt Conversion question

 

I have a question for the group.


In boats sometimes I need to have clean welding done, so i bought a Harbor freight 20 amp MIG wire feed welder ( 60 to 120 amp out).   A friend also gave me an older Dayton brand 26.6 amp input  "buzz box" welder (100 amps out) that both run on 110 volt AC wall plug type input.  Can they be run, one at a time, from a single 220 v. washer / dryer box circuit??  


 I don't think that using the house 110 volt would be safe, not so good for my older home wiring in the country.   The buzz box I will hope to use with magnesium rod,.mostly for steel sheet cutting.  The wire feed machine for building  stuff.  I have a good gas welder/cutter now, but like the MIG option.


I have an extra 220 clothes dryer plug, that might work if I could convert it to 110 safely.  Is there a plug, or a power changing box, with an extension cord, that can go from the 220v to a single leg 110, without having a wiring rework to do ??  Probably some others here have done this change. 


Thanks,  Cal

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Posted by: h20dragon@centurytel.net
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[Electric Boats] Re: Electric trimaran conversion

 

Have you considered motorizing your port and starboard hulls? Keeping the diesel, maybe with a folding prop? If you hung removable rudders on the outer hulls with a gudgeon and pintle setup, you would have the advantages of twin screw maneuverability. Could be inboard electric, or those neat little pod motors. The Perkins like you say has low hours. You could mount two big alternators for charging the banks, one to either side of the PTO, and not place a lateral load on the shaft.

Or mount a pulley on the prop shaft driving/driven by a motor. Running the engine in gear then would charge the batteries via regen. With the gearbox in neutral the electric motor could either turn the prop or charge batteries via regeneration courtesy of the trailing prop. You could still carry a portable generator but you would also have the diesel for charging and propulsion. You wouldn't need a thrust bearing since the prop shaft is still coupled to the diesels gearbox.

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Re: [Electric Boats] Re:Trolling motor for small DIY bow thruster?

 

Yeah that was my major concern. I wonder how those pod motors manage it? Well it's not a pressing issue and it's not the end of the world if my 38 year old boat doesn't get a bow thruster. I just thought it would be way cool to have one. Maybe a jet ski pump unit... I bet I can find one cheap with a blown engine and power it with my spare 5kw motor.

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Re: [Electric Boats] Re:Trolling motor for small DIY bow thruster?

 



I think the main problem will be that trolling motors are not designed to be immersed for months.
It may go well, it may go bad, I would not trust them is such a situation.
On the other hand; your life is not depending on them (if the electric circuit is well fused).
 
Carel.
----- Original Message -----
Sent: Saturday, November 01, 2014 3:49 AM
Subject: [Electric Boats] Re:Trolling motor for small DIY bow thruster?

 

I won't be sailing. The entire boat will eventually be shaded by a hard canopy with solar panels on top and all sail rigging is coming down. I considered the trolling motor rigged as you suggest but it will want more support, and be ugly and awkward. I thought about a motor well but that would mean giving up my vee berth. I think I want it in a tunnel, or not at all.

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Posted by: "Carel Ruysink" <c.ruysink@hetnet.nl>
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