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36 Posts

5141 kwh

5620 kwh

5270 kwh

4191 kwh

Any help would be appreciated. His service is a single phase 200 amp.

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Joined

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36 Posts

5141 kwh

5620 kwh

5270 kwh

4191 kwh

Any help would be appreciated. His service is a single phase 200 amp.

Joined

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7,221 Posts

5141kwh is 5,141,000Wh so divide by the number of days in the month and the number of hours in a day (24) and you'll get the watts used in an hour. Then divide by 240V and you'll get the amps used over a given hour.

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5,563 Posts

Really? That comes out to around 29A per hour.

5141kwh is 5,141,000Wh so divide by the number of days in the month and the number of hours in a day (24) and you'll get the watts used in an hour. Then divide by 240V and you'll get the amps used over a given hour.

What if it was a 50MW motor that ran for 6 minutes a month? Still going to be less than 5141kWh at the end of the month, but isn't that going to be more than 29A peak?

You cannot determine anything useful about peak current from only having kWh measurements, it has zero reference to any instantaneous value.

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7,221 Posts

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7,341 Posts

29 amps per hour? I've been an electrician for 25 years and that's the first time I have ever heard of an amps per hour calculation. Is that even possible?Really? That comes out to around 29A per hour.

ETA, it's like saying my car goes 60 MPH per hour.

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7,221 Posts

You've never heard of Amp-Hours?

Look at the battery on your cordless drill.

Look at the battery on your cordless drill.

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7,341 Posts

I am quite familiar with amp hours, I've only just learned of amps per hour in this thread.You've never heard of Amp-Hours?

Look at the battery on your cordless drill.

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7,221 Posts

I think he was implying Ah and not A/h. :whistling2:

That's vague. What prompted the customer's enquiry? Does he think he needs a service upgrade? Is his power bill too high? Background needed.how much load this customer is usingout of his 200amp service. He has provided me his kwh from the last 4 months.

5141 kwh

5620 kwh

5270 kwh

4191 kwh

Any help would be appreciated. His service is a single phase 200 amp.

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303 Posts

someone may be trying to size a whole house generator by using monthly bills:no:That's vague. What prompted the customer's enquiry? Does he think he needs a service upgrade? Is his power bill too high? Background needed.

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5,563 Posts

I was responding to FrunkSlammer, of course there is no value in knowing "A/hr".29 amps per hour? I've been an electrician for 25 years and that's the first time I have ever heard of an amps per hour calculation. Is that even possible?

ETA, it's like saying my car goes 60 MPH per hour.

FrunnkSlammer had said:

5141kWh per month / 30 days = 171kWh per day5141kwh is 5,141,000Wh so divide by the number of days in the month and the number of hours in a day (24) and you'll get the watts used in an hour. Then divide by 240V and you'll get the amps used over a given hour.

171kWh per day divided by 24 hours = 7.14 kWh/Hour (no such thing, but roll with it here)

7.14 kWh = 7140Wh

7140Wh / 240V = 29.75 A/h

A completely bogus and meaningless value, but it was just the extension of (what turned out to be) FrunkSlammer's joking way of telling the OP the same thing... You can't get there from here.

He is using 100% sometimes and 0% other times.Ok guys I need some help trying to figure out how much load this customer is using out of his 200amp service.

That answer is as in-accurate as any other answer you will get. There is simply not enough information to answer the question.

It's like saying my customers car used 65 gallons of gas last month. How many horsepower did he use out of the 200 HP his car is rated for.

He may have drove like a granny and only peaked out a 40 HP, but drove a long time. Or he may have put the pedal to the metal, red-lined it often, used every one of those 200 HP at times, but didn't go very far.

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2,969 Posts

I hope this is a typo ?" a 50MW motor "

A 50 Mega Watt motor ?

Thats a B I G motor !

month 1: 5141 kwh

5141 kwh

5620 kwh

5270 kwh

4191 kwh

Any help would be appreciated. His service is a single phase 200 amp.

month 2: 5620 kwh

month 3: 5270 kwh

month 4: 4191 kwh

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2,969 Posts

5000kW is only 5Mw !

Not 50Mw !

Not 50Mw !

I think JRaef was correct at 50Mw. He said 50 Mw for 6 minuites /mo. That would be 5000KWh.5000kW is only 5Mw !

Not 50Mw !

60 minutes at 5Mw (or 5,000kW) would be 5,000Kwh

6 minutes at 50 Mw (or 50,000kW) would be 5,000Kwh

If my car get 20 miles per gallon how big does my gas tank need to be? Not enough information to answer the question.

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5,563 Posts

Thank you, yes.I think JRaef was correct at 50Mw. He said 50 Mw for 6 minuites /mo. That would be 5000KWh.

60 minutes at 5Mw (or 5,000kW) would be 5,000Kwh

6 minutes at 50 Mw (or 50,000kW) would be 5,000Kwh

And I know it is an absurd example. THAT was my point!

Sheesh...

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7,221 Posts

Sounds most likely.someone may be trying to size a whole house generator by using monthly bills:no:

OP never came back, think we scared him away.

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