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  #1 (permalink)  
Old 02 Nov 2006, 09:30 am
Art
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Default 12 volt power supply

I am thinking of installing a wheelchair lift in the back of my 2006 Odyssey
for occasional use. That would enable me to easily put my father's power
chair in the back of the minivan once in a while. These things take about
20 amps. There are 3 12 volt (10 amp) power supplies in the minivan, and
rather than permanently installing a wire to the battery as is recommended,
since the lift will only be used once in a while, I was thinking of making a
connector so I could connect all 3 power adapters already installed by the
factory to the lift when I use it. I presume that 3 times 10 amps will give
me 30 amps which is 10 more than it needs. Not being an electronics genius,
anyone knows if there is a problem with my idea? Thanks.


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  #2 (permalink)  
Old 02 Nov 2006, 10:39 am
Woody
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Default Re: 12 volt power supply

Do it right and run the wire to the battery and place the fuse at the
battery. The 10 amp outlets in the car are probably all on the same fuse so
you will still only have 10 amps.


"Art" <begunaNOSPAMPLEASE@mindspring.com> wrote in message
news:Kao2h.970$L6.826@newsread3.news.pas.earthlink .net...
>I am thinking of installing a wheelchair lift in the back of my 2006
>Odyssey for occasional use. That would enable me to easily put my father's
>power chair in the back of the minivan once in a while. These things take
>about 20 amps. There are 3 12 volt (10 amp) power supplies in the minivan,
>and rather than permanently installing a wire to the battery as is
>recommended, since the lift will only be used once in a while, I was
>thinking of making a connector so I could connect all 3 power adapters
>already installed by the factory to the lift when I use it. I presume that
>3 times 10 amps will give me 30 amps which is 10 more than it needs. Not
>being an electronics genius, anyone knows if there is a problem with my
>idea? Thanks.
>



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  #3 (permalink)  
Old 02 Nov 2006, 12:52 pm
John Horner
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Default Re: 12 volt power supply

Art wrote:
> I am thinking of installing a wheelchair lift in the back of my 2006 Odyssey
> for occasional use. That would enable me to easily put my father's power
> chair in the back of the minivan once in a while. These things take about
> 20 amps. There are 3 12 volt (10 amp) power supplies in the minivan, and
> rather than permanently installing a wire to the battery as is recommended,
> since the lift will only be used once in a while, I was thinking of making a
> connector so I could connect all 3 power adapters already installed by the
> factory to the lift when I use it. I presume that 3 times 10 amps will give
> me 30 amps which is 10 more than it needs. Not being an electronics genius,
> anyone knows if there is a problem with my idea? Thanks.
>
>


Bad idea. You will need a separate 30 amp circuit. The existing power
outlets are most likely all on one circuit, but as multiple plugs in
your home can all connect to one circuit.

You need someone well versed in automotive electronics to do it right.

John

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  #4 (permalink)  
Old 02 Nov 2006, 01:12 pm
Matt Ion
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Default Re: 12 volt power supply

John Horner wrote:
> Art wrote:
>
>> I am thinking of installing a wheelchair lift in the back of my 2006
>> Odyssey for occasional use. That would enable me to easily put my
>> father's power chair in the back of the minivan once in a while.
>> These things take about 20 amps. There are 3 12 volt (10 amp) power
>> supplies in the minivan, and rather than permanently installing a wire
>> to the battery as is recommended, since the lift will only be used
>> once in a while, I was thinking of making a connector so I could
>> connect all 3 power adapters already installed by the factory to the
>> lift when I use it. I presume that 3 times 10 amps will give me 30
>> amps which is 10 more than it needs. Not being an electronics genius,
>> anyone knows if there is a problem with my idea? Thanks.
>>

>
> Bad idea. You will need a separate 30 amp circuit. The existing power
> outlets are most likely all on one circuit, but as multiple plugs in
> your home can all connect to one circuit.
>
> You need someone well versed in automotive electronics to do it right.


I'll second that (and Woody's post as well).
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  #5 (permalink)  
Old 02 Nov 2006, 02:36 pm
Art
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Default Re: 12 volt power supply

That was what I figured. Kind of hate to add a high amp wire the length of
the chasis even if done by someone who knows what they are doing. Seems
like a problem waiting to happen.


"Matt Ion" <soundy106@gmail.com> wrote in message
news:hqr2h.248165$R63.241046@pd7urf1no...
> John Horner wrote:
>> Art wrote:
>>
>>> I am thinking of installing a wheelchair lift in the back of my 2006
>>> Odyssey for occasional use. That would enable me to easily put my
>>> father's power chair in the back of the minivan once in a while. These
>>> things take about 20 amps. There are 3 12 volt (10 amp) power supplies
>>> in the minivan, and rather than permanently installing a wire to the
>>> battery as is recommended, since the lift will only be used once in a
>>> while, I was thinking of making a connector so I could connect all 3
>>> power adapters already installed by the factory to the lift when I use
>>> it. I presume that 3 times 10 amps will give me 30 amps which is 10
>>> more than it needs. Not being an electronics genius, anyone knows if
>>> there is a problem with my idea? Thanks.
>>>

>>
>> Bad idea. You will need a separate 30 amp circuit. The existing power
>> outlets are most likely all on one circuit, but as multiple plugs in your
>> home can all connect to one circuit.
>>
>> You need someone well versed in automotive electronics to do it right.

>
> I'll second that (and Woody's post as well).



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  #6 (permalink)  
Old 02 Nov 2006, 03:47 pm
Joe LaVigne
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Default Re: 12 volt power supply

On Thu, 02 Nov 2006 20:36:13 GMT, Art wrote:

> That was what I figured. Kind of hate to add a high amp wire the length of
> the chasis even if done by someone who knows what they are doing. Seems
> like a problem waiting to happen.


Not if the fuse is up front, by the battery. A short further back will
just blow the fuse.

--
Joseph M. LaVigne
jlavigne@hits-buffalo.com
http://www.thelavignefamily.us/MyPipePages/ - 11/2/2006 4:46:43 PM
Tobacconist Brick and Mortar Database: http://bam.tobaccocellar.org/

A pipe gives a wise man time to think and a fool something to stick in
his mouth. -- Anonymous
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  #7 (permalink)  
Old 03 Nov 2006, 12:21 am
Matt Ion
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Default Re: 12 volt power supply

Art wrote:
> That was what I figured. Kind of hate to add a high amp wire the length of
> the chasis even if done by someone who knows what they are doing. Seems
> like a problem waiting to happen.


Not if it's done properly. This is common practice for high-powered stereo
systems, often with much larger wires carrying far higher current. Your purpose
shouldn't require anything bigger than 6ga. or at most 4ga. (see
http://www.engineeringtoolbox.com/am...uge-d_730.html) - imagine double-0
gauge wire over 3/8-inch thick!

Grommets anywhere it passes through metal, an appropriately-rated fuse at the
battery end, and all should be fine (be sure whoever does it upgrades the
battery's ground wire if necessary too - a too-thin ground lead defeats the
whole purpose). If nothing else, any decent car-audio shop should have the wire
in stock in their install bay and should have the job done in less than an hour.
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  #8 (permalink)  
Old 03 Nov 2006, 04:05 pm
Andy & Carol
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Default Re: 12 volt power supply

Go to a Professional 2- way radio dealer...I was a installer in one for
years. Do not try to do it without info! I saw where a fire chief thought,
he knew it all, and installed a 50 amp light bar on his brand new fire red
pickup.

He was answering a fire call one day, when his truck caught on fire and
burnt,total,
before his own fire dept was able to put it out! He took # 12 solid wire,
from the battery, no fuse,
thru a ragged hole in the firewall, just a bad job! Don't take changes!

d
"Art" <begunaNOSPAMPLEASE@mindspring.com> wrote in message
news:Kao2h.970$L6.826@newsread3.news.pas.earthlink .net...
>I am thinking of installing a wheelchair lift in the back of my 2006
>Odyssey for occasional use. That would enable me to easily put my father's
>power chair in the back of the minivan once in a while. These things take
>about 20 amps. There are 3 12 volt (10 amp) power supplies in the minivan,
>and rather than permanently installing a wire to the battery as is
>recommended, since the lift will only be used once in a while, I was
>thinking of making a connector so I could connect all 3 power adapters
>already installed by the factory to the lift when I use it. I presume that
>3 times 10 amps will give me 30 amps which is 10 more than it needs. Not
>being an electronics genius, anyone knows if there is a problem with my
>idea? Thanks.
>



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  #9 (permalink)  
Old 03 Nov 2006, 11:31 pm
Matt Ion
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Posts: n/a
Default Re: 12 volt power supply

Andy & Carol wrote:
> Go to a Professional 2- way radio dealer...I was a installer in one for
> years. Do not try to do it without info! I saw where a fire chief thought,
> he knew it all, and installed a 50 amp light bar on his brand new fire red
> pickup.
>
> He was answering a fire call one day, when his truck caught on fire and
> burnt,total,
> before his own fire dept was able to put it out! He took # 12 solid wire,
> from the battery, no fuse,
> thru a ragged hole in the firewall, just a bad job! Don't take changes!


Oooooo that smarts!

As I stated before, any "good" car-audio shop should be able to do the job as
well, as they'll be experienced with, and have the wire and accessories for,
high-current installations.

One other thought, though, Art: you may want to consider using a separate
battery with a battery isolator to run your lift. The isolator will allow both
batteries to be charged normally, while preventing the lift from draining your
main battery and potentially leaving you stranded. Again, any high-end
car-stereo shop should be able to do it for you, OR a place that does camper
installs/conversions, which is probably the most common use of isolated
two-battery setups.
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  #10 (permalink)  
Old 04 Nov 2006, 10:56 am
Art
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Posts: n/a
Default Re: 12 volt power supply


Thanks to everyone for the valuable posts.


"Matt Ion" <soundy106@gmail.com> wrote in message
news:MAV2h.249939$5R2.57002@pd7urf3no...
> Andy & Carol wrote:
>> Go to a Professional 2- way radio dealer...I was a installer in one for
>> years. Do not try to do it without info! I saw where a fire chief
>> thought,
>> he knew it all, and installed a 50 amp light bar on his brand new fire
>> red pickup.
>>
>> He was answering a fire call one day, when his truck caught on fire and
>> burnt,total,
>> before his own fire dept was able to put it out! He took # 12 solid
>> wire, from the battery, no fuse,
>> thru a ragged hole in the firewall, just a bad job! Don't take changes!

>
> Oooooo that smarts!
>
> As I stated before, any "good" car-audio shop should be able to do the job
> as well, as they'll be experienced with, and have the wire and accessories
> for, high-current installations.
>
> One other thought, though, Art: you may want to consider using a separate
> battery with a battery isolator to run your lift. The isolator will allow
> both batteries to be charged normally, while preventing the lift from
> draining your main battery and potentially leaving you stranded. Again,
> any high-end car-stereo shop should be able to do it for you, OR a place
> that does camper installs/conversions, which is probably the most common
> use of isolated two-battery setups.



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