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Wiring for a well house



 
 
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  #1  
Old September 10th 08, 03:17 PM posted to alt.home.repair
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Posts: 1
Default Wiring for a well house

I am re-wiring my well house. The previous owner had run 12/2 wire (no
ground wire) from a 100 amp breaker on the service panel to a 30 amp
breaker in the yard on a metal stake, then on to the pump house. Along
this run were 2 splices covered with electrical tape. At the well
house he then ran a wire off one leg of the pressure switch and one
wire off the well casing to run a light bulb and heat tape. It looked
like an accident waiting to happen.

The pump motor is: 3450rpm, 3/4HP; Franklin Electric Motor, model
#2445070117, 3/4HP, 1ohm, 230V, 3450rmp, 6.0amp, 2 wire
I plan to use a 60 watt bulb for freeze protection.
The distance to the well from the service entrance is ~65 feet. I plan
to use 12/2 w/gound in conduit (I already have this wire and want to
avoid buying more wire)

Questions:
1. Will a two pole 20amp breaker be sufficient at the service
entrance?
2. If I pull a single 12 gauge wire to the well house, along with the
12/2, can I wire in a 110 circuit for a light?
3. How do I wire the circuit at the well house. Do I need a sub-panel
at the well house with a 20 amp, two pole breaker and a single pole 15
amp breaker?

Wiring to the pump seems straightforward but wiring for a simple light
bulb seems to be adding quite a bit of cost.
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  #2  
Old September 10th 08, 03:30 PM posted to alt.home.repair
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Posts: 460
Default Wiring for a well house

You need to run a minimum of a 12/3 wire. And technically, you should set a
panel at the well house and treat it as a subpanel with the ground and
neutral isolated from one another.

s


wrote in message
...
I am re-wiring my well house. The previous owner had run 12/2 wire (no
ground wire) from a 100 amp breaker on the service panel to a 30 amp
breaker in the yard on a metal stake, then on to the pump house. Along
this run were 2 splices covered with electrical tape. At the well
house he then ran a wire off one leg of the pressure switch and one
wire off the well casing to run a light bulb and heat tape. It looked
like an accident waiting to happen.

The pump motor is: 3450rpm, 3/4HP; Franklin Electric Motor, model
#2445070117, 3/4HP, 1ohm, 230V, 3450rmp, 6.0amp, 2 wire
I plan to use a 60 watt bulb for freeze protection.
The distance to the well from the service entrance is ~65 feet. I plan
to use 12/2 w/gound in conduit (I already have this wire and want to
avoid buying more wire)

Questions:
1. Will a two pole 20amp breaker be sufficient at the service
entrance?
2. If I pull a single 12 gauge wire to the well house, along with the
12/2, can I wire in a 110 circuit for a light?
3. How do I wire the circuit at the well house. Do I need a sub-panel
at the well house with a 20 amp, two pole breaker and a single pole 15
amp breaker?

Wiring to the pump seems straightforward but wiring for a simple light
bulb seems to be adding quite a bit of cost.



  #3  
Old September 10th 08, 05:25 PM posted to alt.home.repair
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Posts: 233
Default Wiring for a well house

On Sep 10, 10:57 am, wrote:

Wiring to the pump seems straightforward but wiring for a simple light
bulb seems to be adding quite a bit of cost.


Use a 240v light bulb


Or two 120v bulbs in series?

  #4  
Old September 10th 08, 07:54 PM posted to alt.home.repair
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Posts: 1,936
Default Wiring for a well house


wrote in message
...
I am re-wiring my well house. The previous owner had run 12/2 wire (no
ground wire) from a 100 amp breaker on the service panel to a 30 amp
breaker in the yard on a metal stake, then on to the pump house. Along
this run were 2 splices covered with electrical tape. At the well
house he then ran a wire off one leg of the pressure switch and one
wire off the well casing to run a light bulb and heat tape. It looked
like an accident waiting to happen.

The pump motor is: 3450rpm, 3/4HP; Franklin Electric Motor, model
#2445070117, 3/4HP, 1ohm, 230V, 3450rmp, 6.0amp, 2 wire
I plan to use a 60 watt bulb for freeze protection.
The distance to the well from the service entrance is ~65 feet. I plan
to use 12/2 w/gound in conduit (I already have this wire and want to
avoid buying more wire)



*If pulling wire underground it must be rated for a wet location. Ordinary
type NM (Romex) is not. You would need to use type UF or individual
conductors such as THWN. It is easier to pull individual conductors into a
conduit.


Questions:
1. Will a two pole 20amp breaker be sufficient at the service
entrance?


*Yes

2. If I pull a single 12 gauge wire to the well house, along with the
12/2, can I wire in a 110 circuit for a light?



*No. All of the conductors should be in the same cable.


3. How do I wire the circuit at the well house. Do I need a sub-panel
at the well house with a 20 amp, two pole breaker and a single pole 15
amp breaker?



*I Think that you will be better off pulling in four #10's and putting a
sub-panel at the well house. That way you can have power for your pump with
less voltage drop and power for lighting and a 120 volt GFI receptacle for
servicing purposes.


Wiring to the pump seems straightforward but wiring for a simple light
bulb seems to be adding quite a bit of cost.



*Labor will be your biggest expense. That wire needs to be at least 18"
deep in the ground.

  #5  
Old September 12th 08, 01:37 AM posted to alt.home.repair
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Posts: 10,566
Default Wiring for a well house

I am re-wiring my well house. The previous owner had run 12/2 wire (no
ground wire) from a 100 amp breaker on the service panel to a 30 amp
breaker in the yard on a metal stake, then on to the pump house. Along
this run were 2 splices covered with electrical tape.

SM: 100 amp breaker feeding 12 gage wire is a bit over capacity. 12 ga is
rated for 20 amps.

At the well
house he then ran a wire off one leg of the pressure switch and one
wire off the well casing to run a light bulb and heat tape. It looked
like an accident waiting to happen.

SM: I'm with you. Though, it probably worked fine for many years.

The pump motor is: 3450rpm, 3/4HP; Franklin Electric Motor, model
#2445070117, 3/4HP, 1ohm, 230V, 3450rmp, 6.0amp, 2 wire
I plan to use a 60 watt bulb for freeze protection.
The distance to the well from the service entrance is ~65 feet. I plan
to use 12/2 w/gound in conduit (I already have this wire and want to
avoid buying more wire)

SM: Yep, wire is expensive. Your 12-2 should feed your 6 amp pump just fine.

Questions:
1. Will a two pole 20amp breaker be sufficient at the service
entrance?

SM: Yes, that should drive your 6 amp motor just fine.

2. If I pull a single 12 gauge wire to the well house, along with the
12/2, can I wire in a 110 circuit for a light?

SM: A black colored stranded wire sounds good. Make the two blacks hot, and
the white a neutral.

3. How do I wire the circuit at the well house. Do I need a sub-panel
at the well house with a 20 amp, two pole breaker and a single pole 15
amp breaker?

SM: I'd want a disconnect switch for when you or someone else is working on
the equipment.

Wiring to the pump seems straightforward but wiring for a simple light
bulb seems to be adding quite a bit of cost.

SM: Do some net search, see if you can find 220 volt light bulbs. Skip the
110 volt sub circuit.
http://www.google.com/products?hl=en...-8&sa=N&tab=wf


 




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