|
Posted by RoyJ on July 13, 2008, 9:46 am
Please log in for more thread options
Your load could be (maginally) handled by a #10 wire in terms of not
overheating the wire and insulation. So that means you need to size the
wire for voltage drop. A quick calc (assuming 2 wire circuit) says that
#10 copper will give you slightly over 10% voltage drop out at the well
head, #8 gives 6% drop, #6 would give you 4% drop. If this is an extreme
service unit (running for weeks on end during the summer when the grid
supply voltage is sagging), go with the heavier wire.
Karl Townsend wrote:
> You may remember I asked about the pressure switch wire for my pump last
> week...
>
> The group convinced me to replace all the wires and put in conduit. More
> investigation shows I should move the pump control box to near the pressure
> switch at the same time, in the basement.
>
> Anyway, I now will have a 380 foot run from the basement to the well with 2"
> conduit installed. The pump uses three wires with loads as follows: red
> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I learned I
> need THWN wire last week. What wire sizes should I order?
>
> Karl
>
>
|
|
Posted by Karl Townsend on July 13, 2008, 12:53 pm
Please log in for more thread options
> Your load could be (maginally) handled by a #10 wire in terms of not
> overheating the wire and insulation. So that means you need to size the
> wire for voltage drop. A quick calc (assuming 2 wire circuit) says that
> #10 copper will give you slightly over 10% voltage drop out at the well
> head, #8 gives 6% drop, #6 would give you 4% drop. If this is an
...
>> conduit installed. The pump uses three wires with loads as follows: red
>> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I
I assume you're talking the red wire. How does a #6 red, #8 black, and
#10 yellow compute? I need to order Monday morning.
This is just a V=IR problem. Anybody know where to find R per 100' on
different wire sizes?
Karl
|
|
Posted by aarcuda69062 on July 13, 2008, 4:12 pm
Please log in for more thread options
> > Your load could be (maginally) handled by a #10 wire in terms of not
> > overheating the wire and insulation. So that means you need to size the
> > wire for voltage drop. A quick calc (assuming 2 wire circuit) says that
> > #10 copper will give you slightly over 10% voltage drop out at the well
> > head, #8 gives 6% drop, #6 would give you 4% drop. If this is an
> ...
> >> conduit installed. The pump uses three wires with loads as follows: red
> >> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I
>
> I assume you're talking the red wire. How does a #6 red, #8 black, and
> #10 yellow compute? I need to order Monday morning.
>
> This is just a V=IR problem. Anybody know where to find R per 100' on
> different wire sizes?
>
> Karl
http://www.powerstream.com/Wire_Size.htm
Handy...
|
|
Posted by Larry Jaques on July 13, 2008, 5:30 pm
Please log in for more thread options On Sun, 13 Jul 2008 11:53:42 -0500, with neither quill nor qualm,
>
>> Your load could be (maginally) handled by a #10 wire in terms of not
>> overheating the wire and insulation. So that means you need to size the
>> wire for voltage drop. A quick calc (assuming 2 wire circuit) says that
>> #10 copper will give you slightly over 10% voltage drop out at the well
>> head, #8 gives 6% drop, #6 would give you 4% drop. If this is an
>...
>>> conduit installed. The pump uses three wires with loads as follows: red
>>> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I
>
>I assume you're talking the red wire. How does a #6 red, #8 black, and
>#10 yellow compute? I need to order Monday morning.
>
>This is just a V=IR problem. Anybody know where to find R per 100' on
>different wire sizes?
Would that be for A/C, D/C, or Bisexual wire, Karl? <wink>
http://www.epanorama.net/documents/wiring/wire_resistance.html
http://www.eskimo.com/~billb/tesla/wire1.txt
http://www.wiringfordcc.com/trakwire.htm
P.S: Shouldn't guys with pumps be asking about _pipe_ sizes instead of
wire sizes? ;)
--
"Giving every man a vote has no more made men wise and free
than Christianity has made them good." --H. L. Mencken
---
|
|
Posted by on July 13, 2008, 6:56 pm
Please log in for more thread options Karl,
guage: ohms/foot:
8 .000628
6 .000395
4 .000248
Hul
> > Your load could be (maginally) handled by a #10 wire in terms of not
> > overheating the wire and insulation. So that means you need to size the
> > wire for voltage drop. A quick calc (assuming 2 wire circuit) says that
> > #10 copper will give you slightly over 10% voltage drop out at the well
> > head, #8 gives 6% drop, #6 would give you 4% drop. If this is an
> ...
> >> conduit installed. The pump uses three wires with loads as follows: red
> >> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I
> I assume you're talking the red wire. How does a #6 red, #8 black, and
> #10 yellow compute? I need to order Monday morning.
> This is just a V=IR problem. Anybody know where to find R per 100' on
> different wire sizes?
> Karl
|
| Similar Threads | Posted | | Wire cable and pulley sizes | December 8, 2008, 5:19 pm |
| FA: hydraulic pump, right angle gear drive, very heavy caster, Oil pump from large milling machine | April 26, 2006, 1:29 am |
| Introducing The Hz2.1 Portable Hot Stamp Wire Marker to Meet Industry's Need for Flexible, Cost-effective Wire Marking | April 30, 2007, 4:13 pm |
| Thin wire is springier than thick wire? | July 1, 2007, 2:29 pm |
| When to run oiler pump during CNC cycle? Bed lift due to oiler pump. | October 27, 2006, 3:34 pm |
| Staple sizes: what do they mean? | October 3, 2007, 2:44 pm |
| Metric sizes | December 19, 2008, 6:46 am |
| Welding gas tank sizes | October 29, 2006, 11:56 am |
| Myford ML4 belt sizes | November 2, 2006, 5:22 am |
| carborundum grit sizes | April 13, 2008, 12:53 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
> week...
>
> The group convinced me to replace all the wires and put in conduit. More
> investigation shows I should move the pump control box to near the pressure
> switch at the same time, in the basement.
>
> Anyway, I now will have a 380 foot run from the basement to the well with 2"
> conduit installed. The pump uses three wires with loads as follows: red
> wire - 27.5 amps, black wire - 19.1 amps, yellow wire 10.8 amps. I learned I
> need THWN wire last week. What wire sizes should I order?
>
> Karl
>
>