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#170839 11/13/07 03:54 PM
Joined: Oct 2002
Posts: 830
S
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I have a 50 amp 120/240 camper power cord going 250 ft. I've been trying to find what the voltage drop is. Can anyone help me with the formula? Thanks Steve
I will have to assume the amperage at 50 amps max.

Last edited by sparkync; 11/13/07 03:55 PM.
sparkync #170840 11/13/07 04:18 PM
Joined: Nov 2002
Posts: 174
K
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You can use the calculator at http://nooutage.com/vdrop.htm, but you will need to know your wire gauge.
or http://www.elec-toolbox.com/calculators/voltdrop.htm will tell you your minimum wire size is going to be #3.

kale #170847 11/13/07 08:29 PM
Joined: Oct 2002
Posts: 830
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A customer is wanting me to get this cord for him. He has a customer who is going to park a "medical RV" on his property. The RV will be approx. 250 ft. away. I'm thinking I need to discourage him from doing this at that distance. Sounds like he's going to burn something up in his RV with low voltage, as well as overheating the cable.
I don't know what the total amperage used will be, but his a/c unit, refrigeration equipment, etc. may take a toll from the lower voltage, especially if he need's #3 instead of #6. Plus the price of the cable is going to be around
$ 860.00 for that type of cable. I'm still looking for a second opinion here. I couldn't get the nooutage.com calculators, it wouldn't come up. Could be a mighty costly mistake if I get the wrong wire for him:( Thanks

sparkync #170852 11/13/07 09:13 PM
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I have an old BASIC program voltage drop calculator if anyone wants it. I can put it on my web site. It still runs with W/98, I suppose XP and Vista can do it


Greg Fretwell
Joined: Oct 2002
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Greg, I could probably use your voltage drop program if you could make it available. I have windows XP. Thanks , Steve

sparkync #170889 11/14/07 09:19 AM
Joined: Oct 2002
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Greg, what is your website? Thanks

sparkync #170890 11/14/07 09:29 AM
Joined: Jul 2004
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This is in the ftp area

http://esteroriverheights.com/electrical/info.zip

This is a lot more than just voltage drop but the voltage drop is in "electrical". I suppose you could pare down the rest of the stuff if you are a BASIC guy but this thing is not really that big. I did not write this. It was an IBM guy I knew. Set your shortcut to run "info.bat"


Greg Fretwell
Joined: Dec 2000
Posts: 4,288
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electure #170895 11/14/07 01:22 PM
Joined: Jun 2007
Posts: 301
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Try the calculators listed above. I use them all the time, to save time.

JValdes #170901 11/14/07 03:41 PM
Joined: Dec 2000
Posts: 4,288
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"Try the calculators listed above. I use them all the time, to save time."
You seem to be skipping over the thread to save time, too.

Read the thread carefully. According to the Original Poster:

"Can anyone help me with the formula?"
and
"I couldn't get the nooutage.com calculators, it wouldn't come up."


Try Googling "Voltage Drop Calculator" if that's what you want. Any one of a number of calculators should pop up.









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