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Author Topic: Being careful about how much power you run through power meters  (Read 593 times)
remauto1187ma
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April 19, 2018, 07:36:59 AM
 #21

THis is why you run 220v. Double the voltage, half the amperage, half the heat from resistance and more efficient.

You are wrong.  The amperage is split in half because there are 2 hot conductors in 240v wiring instead of there only being one in a 120v feed. You are still using the same amount of power.  Watts is Watts.  You cant defy ohms law.   A 120v circuit drawing 20 amps is 2400w and a 240v circuit drawing 10 amps is still 2400w.

Power = E x I (Voltage x current).

So you are using the same amount of power no matter which route (120v or 240v) you take.  Indeed the amps is halved ON THE POWER CONDUCTORS of a 240v wire feed but that wont help since most houses have 120v feeds so a 240v would have to be installed new and obviously could be sized CORRECTLY to avoid any overheating for constant duty.

Go back to school noob.


Double the voltage(P), 1/2 the amperage(I) across the same resistance(R). That IS ohms law.

Wattage is just a measure of power. Power/wattage does not create heat, resistance does.  Half the amperage across a resistance is half the heat. Half the heat = no melted power meter.


The fact he's overloading the circuit is another issue entirely.
You go back to school amateur before you get someone killed.  E=IR is OHMS law, Not P=IR. P=power, E=voltage. Wattage isnt "just a measure a measure of power", It is a direct function of E and I hence the formula  P=EI.  
10A @ 240v is the same as 20A @ 120v. (Ill bet if you multiply 10x240 and 20x120 they both come out to 2400...Watts)  Same 2400w of power.  No less power is consumed on one or the other.  So just because the the current is halved on a 240v circuit but is doubled on a 120v circuit equivalent doesnt save you on anything other than the size of wire needed to handle the current.  The fact that you dont comprehend the fact that watts is watts tells me that you have no idea what you are talking about when it comes to electricity and shouldnt be giving anyone any advice concerning electricity.  Its geniuses such as yourself that end up burning their house down or killing someone with bad "knowledge".
I was an aviation electrician on the F/A18C Hornet in the US Navy, Electrician & Electronic Technician for Eaton Cutler Hammer, Sub contractor for many large manufacturing facilities and have been a technician for the Federal Aviation Administration for 12 years now as a Journeyman Electrician & Electronic Technician.  I take care of a 100kw, 50kw and 37.5Kw standby emergency generator and their switchgear (all 3 phase 208v) among a host of alot more gear that youve never even heard of (VOR Station, MALSR, PAPI and much more).
So what do you do when you arent in your parent's basement, kid?

"Double the voltage(P), 1/2 the amperage(I) across the same resistance(R)"
Really now?  If you double the voltage, current goes up by a factor of 2.  In this case you would need to manipulate ohms law to solve for I which would be I=E/R.   YOU FAIL...Miserably.

Yet you still don't understand how doubling the voltage halves the current in this situation.

Double the voltage, half the current. Half the current, half the heat. Half the heat, no melted power meter.
The only ignorant one here is you. I cant draw it out in crayola for you on here but I guess I can DUMB it down for you.  Doesnt matter that the current is halved because the voltage is doubled (120v)  In a 240v circuit it would be double the voltage of a 120v.
Remember now...Power equals voltage times current.

240v x 10amps is 2400 watts of power
 
The equivalent 120v circuit would be:

120v x 20amps which is still 2400 watts of power.

You are an amateur at best and have no business attempting to teach anyone about electricity. Working at a fast food joint doesnt qualify you to be an electrician.

Google is your friend.
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Wilder wealths
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April 19, 2018, 11:51:39 AM
 #22

Well this is already whispering in my mind, the watt meter is just to calculate the power draw from the wall. As i assume it will be risky to plug it all day / week while mining. Beside the watt meter is not my mine, just borrow it from my pall miners . Hope your rig is ok dude.
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April 19, 2018, 12:03:46 PM
 #23

THis is why you run 220v. Double the voltage, half the amperage, half the heat from resistance and more efficient.

You are wrong.  The amperage is split in half because there are 2 hot conductors in 240v wiring instead of there only being one in a 120v feed. You are still using the same amount of power.  Watts is Watts.  You cant defy ohms law.   A 120v circuit drawing 20 amps is 2400w and a 240v circuit drawing 10 amps is still 2400w.

Power = E x I (Voltage x current).

So you are using the same amount of power no matter which route (120v or 240v) you take.  Indeed the amps is halved ON THE POWER CONDUCTORS of a 240v wire feed but that wont help since most houses have 120v feeds so a 240v would have to be installed new and obviously could be sized CORRECTLY to avoid any overheating for constant duty.

Go back to school noob.


Double the voltage(P), 1/2 the amperage(I) across the same resistance(R). That IS ohms law.

Wattage is just a measure of power. Power/wattage does not create heat, resistance does.  Half the amperage across a resistance is half the heat. Half the heat = no melted power meter.


The fact he's overloading the circuit is another issue entirely.
You go back to school amateur before you get someone killed.  E=IR is OHMS law, Not P=IR. P=power, E=voltage. Wattage isnt "just a measure a measure of power", It is a direct function of E and I hence the formula  P=EI.  
10A @ 240v is the same as 20A @ 120v. (Ill bet if you multiply 10x240 and 20x120 they both come out to 2400...Watts)  Same 2400w of power.  No less power is consumed on one or the other.  So just because the the current is halved on a 240v circuit but is doubled on a 120v circuit equivalent doesnt save you on anything other than the size of wire needed to handle the current.  The fact that you dont comprehend the fact that watts is watts tells me that you have no idea what you are talking about when it comes to electricity and shouldnt be giving anyone any advice concerning electricity.  Its geniuses such as yourself that end up burning their house down or killing someone with bad "knowledge".
I was an aviation electrician on the F/A18C Hornet in the US Navy, Electrician & Electronic Technician for Eaton Cutler Hammer, Sub contractor for many large manufacturing facilities and have been a technician for the Federal Aviation Administration for 12 years now as a Journeyman Electrician & Electronic Technician.  I take care of a 100kw, 50kw and 37.5Kw standby emergency generator and their switchgear (all 3 phase 208v) among a host of alot more gear that youve never even heard of (VOR Station, MALSR, PAPI and much more).
So what do you do when you arent in your parent's basement, kid?

"Double the voltage(P), 1/2 the amperage(I) across the same resistance(R)"
Really now?  If you double the voltage, current goes up by a factor of 2.  In this case you would need to manipulate ohms law to solve for I which would be I=E/R.   YOU FAIL...Miserably.

Yet you still don't understand how doubling the voltage halves the current in this situation.

Double the voltage, half the current. Half the current, half the heat. Half the heat, no melted power meter.
The only ignorant one here is you. I cant draw it out in crayola for you on here but I guess I can DUMB it down for you.  Doesnt matter that the current is halved because the voltage is doubled (120v)  In a 240v circuit it would be double the voltage of a 120v.
Remember now...Power equals voltage times current.

240v x 10amps is 2400 watts of power
 
The equivalent 120v circuit would be:

120v x 20amps which is still 2400 watts of power.

You are an amateur at best and have no business attempting to teach anyone about electricity. Working at a fast food joint doesnt qualify you to be an electrician.

Google is your friend.

Wattage does not melt wires or connectors. Get it through your thick skull.

mikbal
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April 19, 2018, 03:42:24 PM
 #24

Low volt high ampere setups need thicker copper cables. Cables will get hotter on 120V.
Maybe the power meter has low resistance so it melted. 240V setup might have prevented that.
HagssFIN
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April 19, 2018, 04:47:15 PM
 #25

Yep,
components inside an energy meter are not rated to withstand higher current than the nominal current at nominal voltage.

remauto1187ma
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April 19, 2018, 06:56:21 PM
 #26



Wattage does not melt wires or connectors. Get it through your thick skull.


[/quote]

That statement right there clearly proves you havent the slightest clue about what you are talking about when it comes to electricity.  Wattage is a direct function of Current and Voltage.  The wires in the wall have a resistance and the load attached does as well. (Voltage divided by Resistance equals Current)  Kid, you are a freaking rock!  Get over yourself, you do not know what the hell you are talking about and are way out of your league. Give it up snowflake.
gotminer
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April 19, 2018, 08:58:10 PM
 #27

I love watching noobs fight  Grin Grin Grin

Ok, I want you to walk back in there and very calmly, very politely tell the risk assessors to fuck off! -Mark Baum
jillscarbrough
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April 20, 2018, 06:58:03 AM
 #28

for @remauto1187ma

No offense, I am correcting your quote because there is missing code

Code:
[quote author=whitrzac link=topic=3329560.msg35082370#msg35082370 date=1524139426]

if you want to quote there a few codes that you need to pay attention:

Code:
[quote author= #value link=topic=#value #msg date=#value]

And

Code:
[/quote] 





remauto1187ma
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April 21, 2018, 12:49:41 AM
 #29

for @remauto1187ma

No offense, I am correcting your quote because there is missing code

Code:
[quote author=whitrzac link=topic=3329560.msg35082370#msg35082370 date=1524139426]

if you want to quote there a few codes that you need to pay attention:

Code:
[quote author= #value link=topic=#value #msg date=#value]

And

Code:
[/quote] 

I think you have me confused with someone that cares.  Do shiny objects mess with you too?  I figured most were intelligent to look up at the other guys post to see what it all was about...but I guess I was wrong...Atleast in your case.






jillscarbrough
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April 21, 2018, 03:57:56 AM
 #30

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