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Old 06-21-2010, 04:45 PM   #1
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Generator Cord Length


What is the maximum length for a portable generator cord that is #10 gauge, 30 amp/240?

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Old 06-21-2010, 05:13 PM   #2
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Generator Cord Length


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Originally Posted by TNtmblweed View Post
What is the maximum length for a portable generator cord that is #10 gauge, 30 amp/240?
A 5% drop at 240v is 12v and 12v @ 30A is 0.4 ohm and this is 200' of two conductor copper #10.

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Old 06-21-2010, 09:40 PM   #3
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A 5% drop at 240v is 12v and 12v @ 30A is 0.4 ohm and this is 200' of two conductor copper #10.
Yoyizit do your math again that number did not come up right and that is too long a distace for the 240 v 30 amp load and what more OP mention Generator cord and that useally rated at 25 amp not the 30 amp BTW.

The max distance is actally is 125 feet not the 200 feet because you did not took a account of the type of cord.

Merci,Marc
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Old 06-21-2010, 10:38 PM   #4
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Originally Posted by frenchelectrican View Post
Yoyizit do your math again that number did not come up right and that is too long a distace for the 240 v 30 amp load and what more OP mention Generator cord and that useally rated at 25 amp not the 30 amp BTW.

The max distance is actally is 125 feet not the 200 feet because you did not took a account of the type of cord.

Merci,Marc
Like they say in school, "Show your work." You already have my calcs.
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Old 06-21-2010, 10:45 PM   #5
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Generator Cord Length


Ouais .,,,,

But next time you should take a account of the type of cord and the cord have diffrent ampacity than standard building wires that something you should be aware with it.

Most common genereator cord I have ran into they are SJOW or SJOOW one of the two and with 3 conductor 6.0mm have rated to 25 amp max if you have doubts I will snag up North Americian verison of this type of cord and it will have a ampacity chart you will go from there.

Merci,
Marc
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Old 06-22-2010, 10:25 AM   #6
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Originally Posted by frenchelectrican View Post
Ouais .,,,,

have rated to 25 amp max
The French equivalent of "yeah"?

In that case it is 30/25 of 200' = 240' for a 5% drop for #10 AWG annealed copper at 20C if the table, my reasoning and my arithmetic is correct.

But, OP's are never wrong, by definition.

Last edited by Yoyizit; 06-22-2010 at 01:57 PM. Reason: arith right, reasoning not
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Old 06-23-2010, 01:34 AM   #7
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Originally Posted by Yoyizit View Post
The French equivalent of "yeah"?
Yep you got it right it French word for Yeah.

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Originally Posted by Yoyizit View Post
In that case it is 30/25 of 200' = 240' for a 5% drop for #10 AWG annealed copper at 20C if the table, my reasoning and my arithmetic is correct.

But, OP's are never wrong, by definition.


The 20C is that for the ambemnt tempture ?? due I know the portable cord have diffrent tempture rating so let me dig up the info so give me a jour ou duex.

Merci.
Marc
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Old 06-23-2010, 01:53 PM   #8
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Originally Posted by frenchelectrican View Post
Yep you got it right it French word for Yeah.

The 20C is that for the ambemnt tempture ??
My automated online translator cartoon lady is teaching me French.

It's the temperature that the copper has a resistance of 1 ohm per thousand feet.

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