starting a 1 HP well pump with a VFX3648 [RE-wrenches]
William Miller
wrmiller at charter.net
Sat Jan 27 01:55:10 PST 2007
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Colleagues:
I have published a voltage drop calculation spreadsheet on my web site
(http://mpandc.com/resources/resources.html) that I think has some distinct
advantages over any others I have seen:
-It allows you to view voltage drops for a wide variety of conductors at a
glance. This is very useful when making a judgement call on what gauge to
select by considering a range of sizes.
-The spreadsheet works for AC and DC circuits.
-The spreadsheet works at any voltage and amperage you choose to input.
Let me know if you use it and like it. It makes me smile when I can help a
colleague.
William Miller
At 01:21 PM 1/26/2007, you wrote:
>Hi Kurt and Todd
>Yes I agree with Kurt, volt drop in the wire is very
>important, Measure the running amps, look up the wire
>size, look in NEC Chapter 9 Table 8 and find the wire
>size--ohms/1000 feet and calculate the volt drop VD= I
>x ohms/kft x (total ft round trip)/1000, This should
>not bemore than 3 or 5%
>
>As to capacitor size, we always put a larger capacitor
>on a hard starting motor. (there may be some trick in
>regards to the inverter that I am unaware of however.}
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