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Posted by Doug Miller on July 5, 2009, 9:16 am
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>
>The voltage declared indicates that the service is, indeed, delta.
Nonsense. 245VAC could *easily* be a [nominal] 240V single-phase service.
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Posted by Harold and Susan Vordos on July 8, 2009, 3:19 am
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>
>>
>>The voltage declared indicates that the service is, indeed, delta.
>
> Nonsense. 245VAC could *easily* be a [nominal] 240V single-phase service.
Yes, it could be, but we're talking about industrial machinery, generally
powered by three phase. I have serious doubts that a single phase CNC
would contain a $4,000 board when you can buy the machines for that amount
of money.
I'm convinced the wiring in question is three phase. The only remaining
question is whether it's delta or wye. Considering wye reads 208 volts leg
to leg, I'm pretty sure its delta. You?
Harold
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Posted by Doug Miller on July 8, 2009, 9:36 am
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>>
>>>
>>>The voltage declared indicates that the service is, indeed, delta.
>>
>> Nonsense. 245VAC could *easily* be a [nominal] 240V single-phase service.
>
>Yes, it could be, but we're talking about industrial machinery, generally
>powered by three phase. I have serious doubts that a single phase CNC
>would contain a $4,000 board when you can buy the machines for that amount
>of money.
>
>I'm convinced the wiring in question is three phase. The only remaining
>question is whether it's delta or wye. Considering wye reads 208 volts leg
>to leg, I'm pretty sure its delta. You?
The point is that a measurement of 245V, in and of itself, is not proof of
3-phase delta service. I measure 243V between the two legs of my residential
service, and I'm quite sure that it's only single-phase.
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Posted by ingvald44 on July 8, 2009, 10:13 am
Please log in for more thread options Doug Miller wrote:
>>>
>>>> The voltage declared indicates that the service is, indeed, delta.
>>> Nonsense. 245VAC could *easily* be a [nominal] 240V single-phase service.
>> Yes, it could be, but we're talking about industrial machinery, generally
>> powered by three phase. I have serious doubts that a single phase CNC
>> would contain a $4,000 board when you can buy the machines for that amount
>> of money.
>>
>> I'm convinced the wiring in question is three phase. The only remaining
>> question is whether it's delta or wye. Considering wye reads 208 volts leg
>> to leg, I'm pretty sure its delta. You?
>
> The point is that a measurement of 245V, in and of itself, is not proof of
> 3-phase delta service. I measure 243V between the two legs of my residential
> service, and I'm quite sure that it's only single-phase.
What is the voltage at the old location? If it is 240 then there is no
issue with anything the electrician did...
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Posted by Jamie on July 8, 2009, 6:39 pm
Please log in for more thread options Doug Miller wrote:
>
>>
>>>
>>>
>>>>The voltage declared indicates that the service is, indeed, delta.
>>>
>>>Nonsense. 245VAC could *easily* be a [nominal] 240V single-phase service.
>>
>>Yes, it could be, but we're talking about industrial machinery, generally
>>powered by three phase. I have serious doubts that a single phase CNC
>>would contain a $4,000 board when you can buy the machines for that amount
>>of money.
>>
>>I'm convinced the wiring in question is three phase. The only remaining
>>question is whether it's delta or wye. Considering wye reads 208 volts leg
>>to leg, I'm pretty sure its delta. You?
>
>
> The point is that a measurement of 245V, in and of itself, is not proof of
> 3-phase delta service. I measure 243V between the two legs of my residential
> service, and I'm quite sure that it's only single-phase.
How ever, it is most likely originating from a 3 phase source via a
single phase xformer.
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>The voltage declared indicates that the service is, indeed, delta.