re: [DIY] electric voltage drop to an RV

 

5 % is 6 volts

Try these

http://www.powerstream.com/Wire_Size.htm

 

http://www.csgnetwork.com/wiresizecalc.html

 

and 3/0 aluminum running single phase 240 will handle the 40 amp load.

 

Ck

 

 

From: DoIt_Yourself@yahoogroups.com [mailto:DoIt_Yourself@yahoogroups.com] On Behalf Of OOWONBS@Netscape.net
Sent: Thursday, June 07, 2012 3:10 AM
To: DoIt_Yourself@yahoogroups.com
Subject: Re: [DIY] Fw: [DIY] electric voltage drop to an RV

 

> The very max in voltage drop at the farthest used 120V device can not be more 

than 5% of connected 120V supply.  So at the 700' distance you have spec. your 

voltage can not be below 119.5 volts.

> AGAPE, 

> jdb, txredneck

Works for me, aside from codes, EXCEPT that J works hard and 

long and isn't seeing that 5% of 120 has to be 5+ and not 

0.5 vac. We ALL get too-tired days................

I did an RV/Trailer thing a few weeks ago and I deduced that 

for him to use his available 10ga wire he could only draw 

5 or 10 amps. I believe it was about 300 ft. Going to 3 wire,

(use the gnd as a neutral, so it's "2wire") and send 2phase 

or 208vac (often incorrectly called 220 or 240) is a thought.

He gets then, 2 legs of 120vac, just like most homes.

BillSF9c

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