Home » Public Forums » GMCnet » [GMCnet] "Shore" power for GMC
| [GMCnet] "Shore" power for GMC [message #131816] |
Fri, 24 June 2011 09:32  |
k2gkk
Messages: 4452
Registered: November 2009
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This may likely qualify as a "dumb" question.
I know that the 6 KW Onan is 120V output. However, the
Onan's output receptacle into which the shorepower cable
connects is made for split 240V (120V-0-120V), 50A output.
I am assuming (yeah, I know) that the two "Line" conductors
to the Onan output are simply paralleled to double the contact
area to handle the total current.
The big question that I have is:
Can a "normal" 240V input satisfactorily supply the shore
power cable without damage to anything in the coach?
Would each of the two air conditioners normally be wired
to separate 120V input lines?
I am planning to install shore power connections to my
home power system and want maximum flexibility. I plan
to install 120V/30A _AND_ 120V-0-120V/50A outlets on
my manual power transfer box outside my garage.
Cheers!
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~~ ~ ~ (TZE166V101966) ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
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| Re: [GMCnet] "Shore" power for GMC [message #131821 is a reply to message #131816] |
Fri, 24 June 2011 09:50  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Mac,
The GM-fitted coaches 40A cable SHOULD be wired for 120-0-120 vac in
the breaker box. But, in view of the age & number of PO's of these
old coaches, I sure wouldn't plug into such an outlet before examining
the wiring in the box.
If the busses are still independent in the box, with no jumpers nor
other non-OEM connections between them, I''d put an ohmmeter between
them (obviously, with NO other power on the coach) to verify their
sanctity. Then plug-er-in.
Yes, the air conditioners should be on separate 120 vac busses.
JWID,
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL
www.gmcwipersetc.com
On Fri, Jun 24, 2011 at 10:32 AM, D C *Mac* Macdonald wrote:
>...
> Can a "normal" 240V input satisfactorily supply the shore
> power cable without damage to anything in the coach?
>
> Would each of the two air conditioners normally be wired
> to separate 120V input lines?
>
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Ken Henderson
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Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] "Shore" power for GMC [message #131899 is a reply to message #131816] |
Fri, 24 June 2011 21:29 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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The GMC 14-50 recept for the Onan is wired with the single Onan hot paralleled to both x and y hots. The jumper should be right in the box connecting the x and y. Technically the 14-50 NEMA should be wired with a separate leg on x and y. At the campground that is what you should find. On the GMC the Onan is wired as such so all the circuits in the coach get power from the Onan, not just x OR y. I made sure each of my OEM DuoTherms are on separate phases so the load is split when on shore power to try to balance the load as much as possible. When on the Onan, the neutral will have to carry the sum of the x and y loads as they are on the same phase and that is a good reason to inspect the condition of the aging factory cord set each year.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] "Shore" power for GMC [message #131906 is a reply to message #131816] |
Fri, 24 June 2011 23:15 |
GeorgeRud
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Registered: February 2007
Location: Chicago, IL
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In a reverse situation, can the generator's output be split into two 120 volt circuits by seperating the output of the two hot wires, and using the common neutral on both? The ground would also be split into the two circuits.
We had a major storm here in Chicago last week, and the GMC coach was a life saver. The generator was running for about 36 hours straight before the power came back on, and so we were able to keep the refrigerator, sump pump, and a few other things running during the blackout. It's nice to have a good generator with 50 gallons of gasoline for an emergency. It kept my wife much happier than having to throw out a bunch of food and having to deal with a flooded basement. I also use a CPAP machine at night, so I spent the nights in the coach running the CPAP on the coach's power (I also have a 12 volt power cable for it as well), so I had a good night's sleep as well.
I used the plug behind the fridge to power the house, and thought that it might be better to tap into the 220 volt output receptacle on the driver's side rather than run everything on the one outlet. By making up the seperated "emergency" cord, I should have the equivalent of two circuits that I could use.
Any electricians have any input? Is my idea too far fetched?
George Rudawsky
Chicago, IL
75 Palm Beach
[Updated on: Fri, 24 June 2011 23:17] Report message to a moderator |
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| Re: [GMCnet] "Shore" power for GMC [message #131907 is a reply to message #131906] |
Fri, 24 June 2011 23:35 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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Yes it is posssible but any 220 volt appliances (I have a 220 volt well) will not work.
YOU MUST BE ISOLATED FROM THE POWER COMPANY PRIOR TO ATTACHING THE GENERATOR.
A second thought is to just of get a cheap 220 volt Chinese generator. I have one here that I have owned for years. The only time in 32 years that I ever needed it I had loaned it to a friend who was building an airplane hanger. Over the years I have used it for other things like running a 240 volt welder when we were building my hanger. I never store it with with gasoline in it. I always run it completely dry when using it. I also run it for at least 1 hour once a year. Mine has a 12 volt starting circuit and I jump start it off of my car so I'm not out there pulling the rope.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
[Updated on: Fri, 24 June 2011 23:36] Report message to a moderator |
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| Re: [GMCnet] "Shore" power for GMC [message #131921 is a reply to message #131906] |
Sat, 25 June 2011 07:52 |
Andrew
Messages: 213
Registered: April 2011
Location: Connecticut
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| GeorgeRud wrote on Fri, 24 June 2011 23:15 |
In a reverse situation, can the generator's output be split into two 120 volt circuits by seperating the output of the two hot wires, and using the common neutral on both? The ground would also be split into the two circuits.
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If a generator puts out two 120VAC circuits that are 180 degrees out of phase, it would be a 240VAC generator, right?
Two in-phase 120VAC circuits won't get you 240VAC because the difference in potential between the two would be effectively zero.
But, you can get single-phase 240VAC (standard household "220") from a one standard 120VAC circuit by adding a step up transformer. Current availability on the output circuit depends on the transformer and fuses, but can never exceed half of the input circuit.
Like Ken said, ALWAYS make sure you're isolated from the power company. They sell those big generator cutover switches for a reason. Houses burn down and people die when these things are installed improperly.
1973 Sequoia 260 (since 2011)
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| Re: [GMCnet] "Shore" power for GMC [message #131927 is a reply to message #131906] |
Sat, 25 June 2011 09:25 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
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| GeorgeRud wrote on Sat, 25 June 2011 00:15 |
In a reverse situation, can the generator's output be split into two 120 volt circuits by seperating the output of the two hot wires, and using the common neutral on both? The ground would also be split into the two circuits.
<snipped - you can go back and read the story if you so choose>
I used the plug behind the fridge to power the house, and thought that it might be better to tap into the 220 volt output receptacle on the driver's side rather than run everything on the one outlet. By making up the seperated "emergency" cord, I should have the equivalent of two circuits that I could use.
Any electricians have any input? Is my idea too far fetched?
|
George,
BTDT - have lived in one house or another on the long end of a rural feeder for about three decades. When the well pump doesn’t run, nobody is happy. We have had generators handy all this time. One has been split to make 240V -3 wire, but it is not the coach’s Onan.
The next question has to be is the APU the original Onan NH??
If yes - the answer is NO.
If no - the answer is maybe.
All the starter cranked Onans (like BF and NH - power drawers) are what is called a rotating armature machine. (The part that actually makes the power is spinning.) They have two (2) slip rings that power get out through. Those two are 120V - end of discussion..... There may be more wires than that at the breaker, but that was just for Onan’s convenience in assembly as near as I can tell. (They all come off the same places.)
If yours is not an NH Power Drawer, but it is a Kohler or Onan auto-start lighting plant, then you do have a chance as many of those are rotating field machines with a stationary bi-filar (two conductors side by side) wound armature. The connections of the two winding can be separated and one side reversed to get 240V. This was actually done to make the units adaptable to the 200-240V 50Hz part of the world.
Nema connector things that sort of matter ***
1 = ungrounded 120 V
5 = grounded 120V (what every thing in the coach should be)
6 = ground 240 V (no neutral - like most driers - three pins only)
14 = 120/240V grounded with neutral - called 240V 3 wire - this is the GM fit coach shore power.
* - 15, 20, 30, 50 the current rating of the connector
L prefix means twist lock (like all marine shore power cables)
GM fit coaches are 14-50, others may be but many are 5-30
Now,
As to your “emergency” cord, you can make up an adapter to with a 14-50 plug and a pigtail out to what ever you like with a 5-?? receptacle to plug in your “into the house cable(s) (a quad metal box makes a good distribution point). Remember that whatever you connect will only be protected by the 50 amp breaker at the APU. So, all this wire will have to be 50 amp (i.e.6 or 8 AWG). That will leave the coach without APU power, but you could come out the other side of the box with a cable to a 14-50 receptacle that the shore power cable could make use of when needed.
I have such cables that adapt all the ways to L5-30 for life around boatyards.
I am not an electrician (anymore), and I am not a EE (leave that to KenH), but I was a ship’s electrician until I became a licensed ship’s engineer. You might guess, I have a great deal of experience with “electric machinery”. Now, if I could just sell off what I’ve learned for about a nickle on the dollar.....
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] "Shore" power for GMC [message #131958 is a reply to message #131927] |
Sat, 25 June 2011 11:46 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
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| mcolie wrote on Sat, 25 June 2011 07:25 |
The next question has to be is the APU the original Onan NH??
If yes - the answer is NO.
If no - the answer is maybe.
All the starter cranked Onans (like BF and NH - power drawers) are what is called a rotating armature machine. (The part that actually makes the power is spinning.) They have two (2) slip rings that power get out through. Those two are 120V - end of discussion..... There may be more wires than that at the breaker, but that was just for Onan’s convenience in assembly as near as I can tell. (They all come off the same places.)
(snip)
If yours is not an NH Power Drawer, but it is a Kohler or Onan auto-start lighting plant, then you do have a chance as many of those are rotating field machines with a stationary bi-filar (two conductors side by side) wound armature. The connections of the two winding can be separated and one side reversed to get 240V. This was actually done to make the units adaptable to the 200-240V 50Hz part of the world.
(snip)
I am not an electrician (anymore), and I am not a EE (leave that to KenH), but I was a ship’s electrician until I became a licensed ship’s engineer. You might guess, I have a great deal of experience with “electric machinery”. Now, if I could just sell off what I’ve learned for about a nickle on the dollar.....
Matt
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To add to what Matt has said, I had a 6000 watt Onan in a SOB motorhome and had the service manual on it. There were instructions on how to convert it to a 120/240 machine by changing some of the internal connections. This was not hard to do and I did it so it could be the backup generator for my home. One Christmas, we had a power failure and It was used to power the house, including cooking the turkey and running the pump, both required 240 volts.
Unfortunately, the Onan power drawer cannot be converted like that, as Matt says.
I have been working on a Honda eu 3000 inverter generator, 120 volts only. It came to me in boxes of parts, unassembled. I got it running, and yesterday did a test of it to power my well pump via a 120/240 volt transformer. It did start and run the pump, but the red "overload" light came on, which Honda says "operation when the overload light is on will shorten the life of the generator" So, it is not quite big enough for my pump. The inverter generators are great, but their overload starting capacity for motors is limited.
BTW, 120/240 volt transformers are very pricy. I got one of mine at a surplus sale for $4 and the other at Goodwill for $6. Both are over $400 in most catalogs. Stupid price, but that is what I have found. If you can find one with a center taped 240 volt side, you can use the hot legs like a household 120/240 volt system, and connect the center tap to the neutral.
Rob Allen
former owner of '76 x-PB
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| Re: [GMCnet] "Shore" power for GMC [message #131967 is a reply to message #131958] |
Sat, 25 June 2011 12:22 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Here is something that I had posted 8 years ago on this subject:
The model number designations have also changed over the years but the one that should be on the Onans used in GMCs is typically formatted like this:
6.0 NH - 1 R 9500 A
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1 2 3 4 5 6
where :
1. indicates kilowatt rating.
2. Series identification.
3. Voltage code of the generator (1=120 volts)
4. Method of starting (R = remote)
5. Factory code for designating optional equipment, if any.
6. Specification letter which advances when the factory makes production modifications.
For the voltage code, there are 26 different ones for 60 cycle but I will not list them all. There are 5 other AC frequencies available and there are 16 DC generators and 6 welders.
1=120 volt, 1 phase, 2 wire
1X (was 11)=120 volt, 3 phase, 3 wire
2=240 volt, 1 phase, 2 wire
3=120/240 volt, 1 phase, 2 wire
3C=120,240,120/240, 1 phase, 4 wire
The code 1 is not modifiable to a 240 volt system. I would think that the one marked 3 is convertible. I rather doubt that we will find it in our GMCs though.
If anyone need more info than this about their Onan just email me the model number from the plate.
Emery Stora
>
>
> mcolie wrote on Sat, 25 June 2011 07:25
>> The next question has to be is the APU the original Onan NH??
>> If yes - the answer is NO.
>> If no - the answer is maybe.
>>
>> All the starter cranked Onans (like BF and NH - power drawers) are what is called a rotating armature machine. (The part that actually makes the power is spinning.) They have two (2) slip rings that power get out through. Those two are 120V - end of discussion..... There may be more wires than that at the breaker, but that was just for Onan’s convenience in assembly as near as I can tell. (They all come off the same places.)
>>
>> (snip)
>>
>> If yours is not an NH Power Drawer, but it is a Kohler or Onan auto-start lighting plant, then you do have a chance as many of those are rotating field machines with a stationary bi-filar (two conductors side by side) wound armature. The connections of the two winding can be separated and one side reversed to get 240V. This was actually done to make the units adaptable to the 200-240V 50Hz part of the world.
>>
>> (snip)
>>
>>
>> I am not an electrician (anymore), and I am not a EE (leave that to KenH), but I was a ship’s electrician until I became a licensed ship’s engineer. You might guess, I have a great deal of experience with “electric machinery”. Now, if I could just sell off what I’ve learned for about a nickle on the dollar.....
>>
>> Matt
>
>
> To add to what Matt has said, I had a 6000 watt Onan in a SOB motorhome and had the service manual on it. There were instructions on how to convert it to a 120/240 machine by changing some of the internal connections. This was not hard to do and I did it so it could be the backup generator for my home. One Christmas, we had a power failure and It was used to power the house, including cooking the turkey and running the pump, both required 240 volts.
>
> Unfortunately, the Onan power drawer cannot be converted like that, as Matt says.
>
> I have been working on a Honda eu 3000 inverter generator, 120 volts only. It came to me in boxes of parts, unassembled. I got it running, and yesterday did a test of it to power my well pump via a 120/240 volt transformer. It did start and run the pump, but the red "overload" light came on, which Honda says "operation when the overload light is on will shorten the life of the generator" So, it is not quite big enough for my pump. The inverter generators are great, but their overload starting capacity for motors is limited.
>
> BTW, 120/240 volt transformers are very pricy. I got one of mine at a surplus sale for $4 and the other at Goodwill for $6. Both are over $400 in most catalogs. Stupid price, but that is what I have found. If you can find one with a center taped 240 volt side, you can use the hot legs like a household 120/240 volt system, and connect the center tap to the neutral.
>
>
>
>
>
>
>
> --
> Rob Allen
> former owner of '76 x-PB
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Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] "Shore" power for GMC [message #131982 is a reply to message #131816] |
Sat, 25 June 2011 14:58 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
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I have a Generac Primepac 50 in my coach, so I think I can split the feed to get two 120 volt circuits. the generator has two 20 amp beakers on it's panel, so I think I should be fine. I will use a square metal bos with two regular household receptacles, one fed off of each leg, to get me both 120 volt circuits.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: [GMCnet] "Shore" power for GMC [message #132041 is a reply to message #131984] |
Sat, 25 June 2011 23:02 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Mr ERFisher wrote on Sat, 25 June 2011 16:30 |
au contraire mon fraire
the 6k has been converted to 220 volts at least 2 times that I know of
http://www.gmcmotorhome.info/generator.html
gene
> Unfortunately, the Onan power drawer cannot be converted
--
Gene Fisher -- 74-23,77PB/ore/ca
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Gene,
Mais si, je dois insister!
I do not mean to discount the service your online documentation provides, but I believe you missed this one.
The cited link takes one to a note about making changes to Onan models that are either BGE or NHE. As I recall, the Emerald series (what the E means) was introduced in the mid to late 80's. It is not likely that this was ever original installed equipment in a GMC. It is a very different machine than the NH Power Drawer. In fact the only commonality is the NH type engine on the front.
As George Rud is the proud owner of a '75 Palm Beach, it will only have something other than a 6Kw Onan NH Power Drawer if it has been changed by him or some PO. I made this stipulation early in the response.
George, please read Emery's note on model numbers and if it is a 3 or 3c in position 3, send me the schematic and we will figure it out.
Don't stop doing what you are doing Gene.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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| Re: [GMCnet] "Shore" power for GMC [message #132150 is a reply to message #131906] |
Sun, 26 June 2011 21:08 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| GeorgeRud wrote on Fri, 24 June 2011 23:15 |
In a reverse situation, can the generator's output be split into two 120 volt circuits by separating the output of the two hot wires, and using the common neutral on both? The ground would also be split into the two circuits.
I used the plug behind the fridge to power the house, and thought that it might be better to tap into the 220 volt output receptacle on the driver's side rather than run everything on the one outlet. By making up the separated "emergency" cord, I should have the equivalent of two circuits that I could use.
Any electricians have any input? Is my idea too far fetched?
|
George as you DO NOT have an original Onan in your coach (the original is sittin in my barn, thank you) you may have a 120/240 machine. In any case if you want some help with this give me a call or PM me. I can come down and we can figure out the best way to do this and put it all together. We should be able to geterdone in one day. We should be able to get you more than two circuits and do it in a way that will not get ComEd excited. Sorta like what we talked about for your veterinary office coolers. It could also be set up to do the office OR the house.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] "Shore" power for GMC [message #132221 is a reply to message #131816] |
Mon, 27 June 2011 09:49 |
sgltrac
Messages: 2797
Registered: April 2011
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I was planning on having an electrician friend of mine wire me up a 240 volt set up off of my 6k onan so I would be able to run my tig welder when off racing. That is a disappointment if it cannot be done.
Sully
77royale
------Original Message------
From: mr.erfisher@gmail.com
Sender: gmclist-bounces@temp.gmcnet.org
To: gmclist@temp.gmcnet.org
ReplyTo: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] "Shore" power for GMC
Sent: Jun 25, 2011 3:42 PM
Why do this?
Gene
FREE WIFI @ Mickey D
On Jun 25, 2011, at 12:58 PM, George Rudawsky <GeorgeRud@aol.com> wrote:
>
>
> I have a Generac Primepac 50 in my coach, so I think I can split the feed to get two 120 volt circuits. the generator has two 20 amp beakers on it's panel, so I think I should be fine. I will use a square metal bos with two regular household receptacles, one fed off of each leg, to get me both 120 volt circuits.
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] "Shore" power for GMC [message #132241 is a reply to message #132231] |
Mon, 27 June 2011 10:52 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| Robert Mueller wrote on Mon, 27 June 2011 10:28 |
Could you get a step up transformer for the TIG welder?
Regards,
Rob M.
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An autotransformer would only have to be 1/2 the size of a stepup transformer.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] "Shore" power for GMC [message #132251 is a reply to message #132231] |
Mon, 27 June 2011 11:40 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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And those 120V tools made for 60 Hz operation
in North America won't last as long on the
50 Hz power of most of the world, even if
operated through a step-down transformer.
It's a matter of that inductive reactance
once again. There will be MORE current
drawn on the lower frequency power because
(as I said) the reactance is in a DIRECT
proportion relationship to the frequency.
The lower the line frequency, the more
windings and core must be in transformers
and motor windings.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
--------------
> From: robmueller@iinet.net.au
> To: gmclist@temp.gmcnet.org
> Date: Tue, 28 Jun 2011 01:28:04 +1000
> Subject: Re: [GMCnet] "Shore" power for GMC
>
> Sully,
>
> I retired to Australia with lots of 120 VAC tools. I have a number of step
> down transformers which take the power from 240 VAC to 120 VAC. The tools
> run slower because of the 50Hz.
>
> Could you get a step up transformer for the TIG welder?
>
> Regards,
> Rob M.
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
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| Re: [GMCnet] "Shore" power for GMC [message #132266 is a reply to message #132251] |
Mon, 27 June 2011 12:23 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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Mac, I am thoroughly confused now. Is there no feasible way to take the 120 volt outputs and merge them into one 40amp 240v outlet (assuming that you can run nothing else off the generator while the 240 is in use)?
Sully
77royale
Sent from my Verizon Wireless BlackBerry
-----Original Message-----
From: D C *Mac* Macdonald <k2gkk@hotmail.com>
Sender: gmclist-bounces@temp.gmcnet.org
Date: Mon, 27 Jun 2011 11:40:45
To: <gmclist@temp.gmcnet.org>
Reply-To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] "Shore" power for GMC
And those 120V tools made for 60 Hz operation
in North America won't last as long on the
50 Hz power of most of the world, even if
operated through a step-down transformer.
It's a matter of that inductive reactance
once again. There will be MORE current
drawn on the lower frequency power because
(as I said) the reactance is in a DIRECT
proportion relationship to the frequency.
The lower the line frequency, the more
windings and core must be in transformers
and motor windings.
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
~~ ~ D C "Mac" Macdonald ~ ~~
~ ~ Amateur Radio - K2GKK ~ ~
~ ~ USAF and FAA, Retired ~ ~
~ ~ ~ Oklahoma City, OK ~ ~ ~
~~ ~ ~ "The Money Pit" ~ ~ ~~
~ ~ ~ ex-Palm Beach, 76 ~ ~ ~
~ www.gmcmhphotos.com/okclb ~
~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
--------------
> From: robmueller@iinet.net.au
> To: gmclist@temp.gmcnet.org
> Date: Tue, 28 Jun 2011 01:28:04 +1000
> Subject: Re: [GMCnet] "Shore" power for GMC
>
> Sully,
>
> I retired to Australia with lots of 120 VAC tools. I have a number of step
> down transformers which take the power from 240 VAC to 120 VAC. The tools
> run slower because of the 50Hz.
>
> Could you get a step up transformer for the TIG welder?
>
> Regards,
> Rob M.
> Sydney, Australia
> AUS '75 Avion-The Blue Streak TZE365V100428
> USA '75 Avion-Double Trouble TZE365V100426
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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