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Posted by Karl Townsend on July 12, 2008, 7:28 pm
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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
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Posted by Tom Gardner on July 12, 2008, 8:42 pm
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> 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
>
I don't have my book at home to figure it out but, explain to me why the
imbalance, I'm curious.
>
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Posted by RoyJ on July 12, 2008, 8:55 pm
Please log in for more thread options The run cap sits at the top of the well in the control box, the motor is
at the bottom of the well. These are leads that you normally don't see
when you have a motor with L1/L2 and included cap. The yellow and black
amps add to the the red amps with a bit of phase shift to account for
the difference.
Tom Gardner 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
>>
>
> I don't have my book at home to figure it out but, explain to me why the
> imbalance, I'm curious.
>
>
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Posted by joelblatt@aol.com on July 13, 2008, 7:37 am
Please log in for more thread options 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
If you have a long run and high current, mighy be a good time to
consider a relay close to the pump, you can run thinner wires from the
switch to the relay... Joel in FLorida
=3D=3D=3D=3D=3D=3D=3D=3D=3D
> investigation shows I should move the pump control box to near the pressu=
re
> 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 learne=
d I
> need THWN wire last week. What wire sizes should I order?
>
> Karl
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Posted by joelblatt@aol.com on July 13, 2008, 11:44 am
Please log in for more thread options Well, I didn't read the original post carefully enough, I guess the
relay was a stupid suggestion, considering the long run is from the
source to the pump - not much you can do here except use larger wires
- if the switch is a long way from the pump, a relay would let you use
lighter wires to and from the switch... joel
=3D=3D=3D=3D=3D=3D
>
> If you have a long run and high current, mighy be a good time to
> consider a relay close to the pump, you can run thinner wires from the
> switch to the relay... Joel in FLorida
> =3D=3D=3D=3D=3D=3D=3D=3D=3D
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> 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
>