# Water pump with a stinger

#### Delta8

##### Member
there is a well pump that is 1.5hp 3phase. it is 120/240v with a stinger at 208v.
will the pump still work on a 120/240 3phase delta system with no stinger?

#### tom baker

##### First Chief Moderator
Staff member
What is a stinger? In my area (Seattle) we are concerned with murder hornets and their stingers...

#### Dennis Alwon

##### Moderator
Staff member
What is a stinger? In my area (Seattle) we are concerned with murder hornets and their stingers...

I think it means a high leg. But his question is confusing.

#### ActionDave

##### Moderator
Staff member
Welcome to the forum.

Need some clarification. There is no such thing as a 240/120V delta system without a high leg, so what is your reason for asking?

#### infinity

##### Moderator
Staff member
Since the motor is 3 phase and 240 volts the 120 and 208 volt components of the system are irrelevant.

#### Delta8

##### Member
it is a 3 phase motor 120/208. The utility voltage coming in is 3ph 120/208 with a "high leg" or "stinger". the question is... will the motor for the pump still work on a 120/240 volt 3ph.

#### oldsparky52

##### Senior Member
there is a well pump that is 1.5hp 3phase. it is 120/240v with a stinger at 208v.
will the pump still work on a 120/240 3phase delta system with no stinger?
it is a 3 phase motor 120/208. The utility voltage coming in is 3ph 120/208 with a "high leg" or "stinger". the question is... will the motor for the pump still work on a 120/240 volt 3ph.
Those highlighted voltages are suspect.

#### Little Bill

##### Moderator
Staff member
it is a 3 phase motor 120/208. The utility voltage coming in is 3ph 120/208 with a "high leg" or "stinger". the question is... will the motor for the pump still work on a 120/240 volt 3ph.
You don't have a high leg or stinger with a 120/208 service. It would have to be a 240/120V Delta to have a high leg/stinger.

#### Delta8

##### Member
Will a 208 wye motor run on a 240/120 delta?

#### oldsparky52

##### Senior Member
Will a 208 wye motor run on a 240/120 delta?
Usually a 3-phase motor will operate fine on a range of voltage from 208 to 240. Your wye service is 208 and your delta is 240 so usually the motor will work. Do you have any idea what the name plate on the motor says?

#### Dennis Alwon

##### Moderator
Staff member
Will a 208 wye motor run on a 240/120 delta?
It may for awhile but it will prematurely burn up. You need a transformer

Thank you

#### tom baker

##### First Chief Moderator
Staff member
Will a 208 wye motor run on a 240/120 delta?
Yes but the higher voltage will saturate the windings, the result being more current draw, per NEMA. A motor that is designed to run on a 120/208 volt system will have a name plate rating of 200 Volts. NEMA motors are designed with a +/- 10% voltage tolerance. 10% of 240 is 24 volts, 240-24 = 216 volts.

#### Hv&Lv

##### Senior Member
Will a 208 wye motor run on a 240/120 delta?
Not for long, if it manages to turn at all.
A 208Y motor on 240 delta?
I expect it will go poof when the disconnect is turned on.

#### don_resqcapt19

##### Moderator
Staff member
Not for long, if it manages to turn at all.
A 208Y motor on 240 delta?
I expect it will go poof when the disconnect is turned on.
While not a good idea, it will not go "poof" when the disconnect is turned on. It will run for some time before it fails from over voltage.

#### Hv&Lv

##### Senior Member
While not a good idea, it will not go "poof" when the disconnect is turned on. It will run for some time before it fails from over voltage.
Not the one I hooked up..
Went poof!
some will, some won’t

#### Delta8

##### Member
The voltage from the utility is 120/240 with a high leg of 208v. the pump works

#### tom baker

##### First Chief Moderator
Staff member
Certainly it will work but you will experience shorter motor life due to the higher voltage past the 10% maximum. Can you measure the amps and what are the nameplate amps?
What is the nameplate rated voltage, 200?

#### LarryFine

##### Master Electrician Electric Contractor Richmond VA
there is a well pump that is 1.5hp 3phase. it is 120/240v with a stinger at 208v.
will the pump still work on a 120/240 3phase delta system with no stinger?
Absolutely. The 208v "stinger" has nothing to do with the motor; that's a characteristic of the supply. It is only a 240v, 3ph load.

A high-leg delta supply is a 120/240v 1ph supply superimposed on a regular delta 3ph supply; it has the characteristics of both.

To a 3ph-only load, the line-to-neutral voltages are irrelevant. As long as the load is rated for the delta voltage, it will work fine.