Aluminum vs Copper? [RE-wrenches]

[Jeff Clearwater]

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Hi Ron,

Basic 3-phase formula:  P/V/1.73=I

Or Power divided by Voltage divided my 1.73 = Amperage per leg  (1.73 
is the square root of 3).

: )

Jeff C.
Village Power Design



>Hi Chris,
>Do you have a formula for this?
>
>Ron
>
>On 3-Sep-06, at 7:26 AM, Chris Worcester wrote:
>
>>
>>Hi Ron,
>>
>>This is 3 phase wild AC from the turbine with 3 conductors going to the
>>Proven ECM2502. The math is different for three phase, you do have an extra
>>conductor carrying the current. The 2500 watt 48 volt calc comes in at 30.07
>>amps per phase. These values I quoted you for the 300' distance are using a
>>3 phase calc.
>>
>>2% voltage Drop = 4/0 copper
>>3% VD = 2/0 copper
>>4% VD =1/0 Copper
>>5% VD =1 AWG copper
>>
>>You can use the aluminum if you like, just be sure to use an anti-oxidant on
>>all connections. I don't use aluminum as I don't feel it's as durable.
>>
>>Sincerely,
>>
>>Chris Worcester
>>NABCEP Certified PV Installer
>>USA Distributor of Proven Wind Turbines
>>Toll Free: 877-682-4503
>>Fax: 530-582-4603
>>www.solarwindworks.com
>>chris at solarwindworks.com
>>"Proven Energy Solutions"
>>-----Original Message-----
>>From: Ron Young [mailto:solareagle at solareagle.com]
>>Sent: Saturday, September 02, 2006 4:26 PM
>>To: RE-wrenches at topica.com
>>Subject: Aluminum vs Copper? [RE-wrenches]
>>
>>
>>Wrenches,
>>This may have been discussed previously but would appreciate input. I'm
>>using a long run of wire 2/0 ga. copper would put me right on the line
>>for 5% line loss (wind turbine @48v approx. 52 amps max. output, 2.5kw)
>>. 4/0 aluminum would be about 6.3% voltage drop according to my
>>calculations. The aluminum is a much bigger piece of wire but less than
>>half the price. Any comments on working with one vs. the other?
>>
>>Ron Young
>>Solareagle
>>
>>
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>
>
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-- 
~~~~~~~~~~~~~
Jeff Clearwater
Village Power Design
Sustainable Energy & Water Solutions for Home & Village
http://www.villagepower.com
gosolar at villagepower.com
NABCEP (tm) Certified Solar PV Installer

530-470-9166
877-SOLARVillage
877-765-2784
72 Baker Rd.
Shutesbury, MA 01072
425 Nimrod St.
Nevada City, CA 95959
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~`~


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