Well pump???? resistance??

old · Jan 9, 2010

Ok since I'm home alone, wife in in Chicago for the boys graduation from boot camp which by the way he is no longer a recruit but a seaman or as some of you understand is an E-3.
Any how if I check the Resistance of this pump motor at the wires going to the pressure switch what should I get. Well is 100 foot so there's a little over 100 foot of wire and this is a 220v submersible pump. So what readings should I get across the 2 hot leads and then from hot to ground
Thanks

wfw · Jan 9, 2010

I do not remember the dc resistance between the two hot leads, but both hot leads to ground should be open, infinite resistance. my controls are about 700 feet from the pump and as best as i remember dc resistance between the hot leads as 43 ohms. but i am not real sure of that figure. also hp of pump will change the resistance, my pump is 3/4 hp.

frank

Riverslim · Jan 9, 2010

I arrived at Great Lakes in late Jan. 69 for boot camp. I'll never forget those winds off the lake, couple of days we did not march outside.

PJH · Jan 9, 2010

Old, did you get a manual with your pump? My Goulds pump manual has a troubleshooting section for testing the motor before pulling it from the well. I haven't looked at it in a long time, but I think it has a wiring schematic with resistance readings (for the motor). You'd have to calculate the added resistance for the wire footage. Do you have a Goulds pump with a Franklin motor? If you do, I'll try to find the manual.

Paul

NCWayne · Jan 9, 2010

Boot camp in 'Great Mistakes" during the winter of '86. We had around Eight inches of snow all winter and it was gone in two day. We were told it was one of the mildest winters they had ever had....

old · Jan 9, 2010

I have no idea what brand of pump it is. I had it out just a week or so ago but did not look at the brand of it. I had to replace the wire when I had it pulled and I'm thinking that since the old wire wore that it started to give the pump motor a low voltage problem which then in turn may have wore it so that when I replaced the wire and it got full voltage again it smoked it

TomA in CA · Jan 9, 2010

Check inside your control box for the pump. There is usually a chart that gives the resistances. Better take your glasses.

Tom

buickanddeere · Jan 9, 2010

Nothing from L1 or L2 to ground or L1 or L2 to neutral. Otherwise the pump winding are shorting to chassis.
L1 to L2 there should be 2 to 5 ohm depending on the meter, wiring and motor size.What HP?
Is this a 2 wire or 3 wire pump?What kind of control/switch? Just a pressure switch or a relay box?

old · Jan 9, 2010

Now sure of the HP but think it is either 1/2 or 3/4. Simple pressure switch only and it is a 3 wire 2 hot and one ground. Cheap meter with out wires unhooked but breaker off and pressure switch closed on the 200K setting I get infanant resistance but go up to the 2M setting I get a reading so I figure the motor has smoked on me and has burned up

buickanddeere · Jan 9, 2010

Those reading from line to earth/ground are good.

Being a two wire pump with the starter switch built into the pump. The motor or switch could be worn/smoked.
Replacement three wire pumps have no centrifugal switch in the pump.They a bring a start winding lead up on the 3rd wire and connect to a relay/control box in the "pump room".
Three wire pumps also allow the option of a variable speed drive built by Franklin. The motor speed is dialed up or down to maintain pressure depending on the flow. When flow stops the pump stops.
Must less start-stop torque wear on the pump,pipework & well wiring too.

bill b va · Jan 9, 2010

if you don't have a control box between the pressure switch and the pump you have a 2 wire pump . if this is the case unhook the two pump wires and check resistance between the two wires . should be some resistance depending on HP . its harder to check motor windings with a analog meter ( needle type . best is a digital type with a low scale . 0- 200 ohm or so . if you have no reading between the 2 pump wires then you have a open between the meter and through internal motor windings . i am betting it is the wires between the switch and the motor . if you have a control box then you have 3 wire motor and the 3 leads are common ,start and run. on a 3 wire motor there should be resistance between any 2 of the wires.

old · Jan 9, 2010

Wire from the pressure switch to the pump are new as in I replaced that wire about a week ago with 12-4 would have used 12-3 but they did not have 110 feet of it so had to go with the 12-4 instead

Anonymous-0 · Jan 9, 2010

congrts...to your boy on his graduation. i have been there recently and was verrrrrry proud of all the graduates and navy personnel.

Anonymous-0 · Jan 9, 2010

sound's like the pump is done. you sure are have alot of stuff break this month.

Well pump???? resistance??

old

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old

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