-
Having trouble using the site?
Contact support
So Which Is It? Amps Or Volts?
- Thread starter Maser
- Start date
Kirchoff would be rolling in his grave following this thread 
Strap magnets to his feat and we could generate powerKirchoff would be rolling in his grave following this thread
if he doesn’t pass the blunt on to someone else before he tries your resistors in a power socket, he gonna end up dead.
he’s either a huge troll, high, or the dumbest douche ever. Multiple people smarter than him telling him how it is, offering proof even and he still denies…. You could lead a horse to water, but its dead and he’s still flogging it
You have the (circuit element X) resistor on the wrong side of the ammeter...we have no clue as to how many amps the circuit is....and it shows as a DC circuit. A series of AAA batteries....or a bank of 64 group 27 batteries comprise your "VB" ?
The whole thing is to measure the amperage change the resistor inflicts on the system.
You do know DC ammeters are polarity sensitive, right ? No polarity shown, the reading will be different with incorrect polarity.
Fail ?
At least give a wire gauge size.
Radically different if it's 28awg vs ACS500 wire, innit ?
BTW, the last time I dun try'd ta spel FEET, I didn't spelt it FEAT.
Srsly ?
You know how Leonardo Da Vinci painted The Last Supper and it was amazing and then he's all like "no wait I got something more" and busts out the Mona Lisa? Your posts in this thread are like that, too, but instead of beautiful they're just soul-crushingly wrong. (Unless this is a troll, in which case it's some of the best I've ever seen.)
@n2ishun everybody in this thread is right, except you. I’m an electrical engineer, at least that what my diploma says, and Ohm’s Law is the easiest, most basic, equation we have to work with.
V=IR.
Plug some numbers in it. Don’t forget about the equal sign, it’s not there as a decoration.
And it doesn’t matter where the amp meter is located in the circuit, the current will be the same all the way through the circuit, from the positive post to the negative post.
“The whole thing is to measure the amperage change the resistor inflicts on the system.”
Wrong! What your talking about is the voltage. The voltage will change throughout the system. It’s called voltage drop. The voltage on the top of the resistor is going to be higher than the voltage on the bottom of the resistor. But, the current will remain the same all the way through the circuit.
I would explain more, but I have to get up and go to work, where they pay me to use Ohm’s law every day.
Bingo, it's actually very simple. Where a lot of people in my field troubleshoot by measuring resistance in a component or worse circuit I have always used voltage drop both with the load in the circuit (both the load that is designed into and supposed to be in the circuit and the loads that are not supposed to be in there) and with my own known load that I apply. Voltage drop is a much better way for me to find out if a circuit or component is good or not.
It kind of matters where the amp meter is. It has to be in series in the circuit to measure amps.
I have been to a lot shops where guys don't know how to measure voltage drops, or resistance. Most of them didn't understand continuity either though. Any electrical problem was, "must be short somewhere."
I remember one day everyone was working on some trailer lights all day, except me, and my dad was gone or they would have come over and asked him for help. They were getting ready to start pulling the wires our of the entire livestock trailer. And send the guy off with another trailer. Which also wouldn't have worked.
They had diagnosed it as trailer problem by hooking their test light to the frame and checking the plug on the truck. We have everything at the plug and nothing in the trailer when we plug it in. The wires must be cut. I said let me look real quick. Their heads cocked to the side like puppies hearing their first squeaker. Moved the ground to the grounding post on the trucks plug, and nothing. Try to explain to glazed looks like I was talking Swahili witch doctor, while I fixed the plug in less time than to would have taken to dolly off the trailer.
Most people don't know dick about electric.
I think maybe he is confusing resistance with a load. For example if you double your voltage it will cut the amperage the load pulls in half correct? That had me thinking he was right. Then I had to go to online calculator when my ohms law math kept saying it was opposite. Am I at least half confused as well?
I have been to a lot shops where guys don't know how to measure voltage drops, or resistance. Most of them didn't understand continuity either though. Any electrical problem was, "must be short somewhere."
I remember one day everyone was working on some trailer lights all day, except me, and my dad was gone or they would have come over and asked him for help. They were getting ready to start pulling the wires our of the entire livestock trailer. And send the guy off with another trailer. Which also wouldn't have worked.
They had diagnosed it as trailer problem by hooking their test light to the frame and checking the plug on the truck. We have everything at the plug and nothing in the trailer when we plug it in. The wires must be cut. I said let me look real quick. Their heads cocked to the side like puppies hearing their first squeaker. Moved the ground to the grounding post on the trucks plug, and nothing. Try to explain to glazed looks like I was talking Swahili witch doctor, while I fixed the plug in less time than to would have taken to dolly off the trailer.
Most people don't know dick about electric.
I think maybe he is confusing resistance with a load. For example if you double your voltage it will cut the amperage the load pulls in half correct? That had me thinking he was right. Then I had to go to online calculator when my ohms law math kept saying it was opposite. Am I at least half confused as well?
If the load remains the same, say 100 ohms, and you double the voltage, then the current will double.
Maybe what is creating confusion are things like a motor circuit. For example, take a 1/2HP 115/230VAC motor and look at the nameplate. It will show something like 10A @115V and 5A @ 230VAC. It uses half the current at 230V, correct?
It does, but the windings are not in the same configuration and therefore the load is not the same. The electrician changes the motor windings to be in parallel for 115V and places them in series for 230V. When the winding are places in series, it doubles the resistance of the load. Current is halved, smaller wire can be used, but the watts remain almost identical at either voltage.
Maybe what is creating confusion are things like a motor circuit. For example, take a 1/2HP 115/230VAC motor and look at the nameplate. It will show something like 10A @115V and 5A @ 230VAC. It uses half the current at 230V, correct?
It does, but the windings are not in the same configuration and therefore the load is not the same. The electrician changes the motor windings to be in parallel for 115V and places them in series for 230V. When the winding are places in series, it doubles the resistance of the load. Current is halved, smaller wire can be used, but the watts remain almost identical at either voltage.
You spelled trolling wrong.
You spelled trolling wrong.
Well, hell... if that's what we're doing, I'll just pull the pin on this one and give it a toss...
Those could be my old 16mm film friends Vicky Volt, Andy Ampere, and I think Oscar (maybe Otto?) Ohm.
I like this version better...
I believe that the misunderstanding is exactly what is posted here ^^^^^^.
Series and parallel circuits. If you add more resistance in series the current is going to drop. If you add resistance in parallel the current will increase in the main. In parallel the current is the sum of each parallel circuit.
So, reading amperage on the main supply will increase by adding resistance if it's a parallel circuit. So if you don't realize that the circuit is parallel you would believe that by adding another resistor is increasing the amperage.
Your home wiring is all parallel circuits. You put an amp meter on the main and turn breaker number one on and read 5 amps. Turn breaker number two on and read 10 amps. It'll make you think that adding more resistance is increasing current. But you are not adding it in series. It's parallel.
He gave you reality's formula. It's not someone else's, it's literally everyone's. You are mistaking impedance for resistance in those speakers.
Dear God don't confuse him with AC, dude can't even hook up an Ammeter correctly.
J = σE
I am sorry for you being an electrician. Living in a world where everyone thinks they know as much as you do. Sucks ass and not in a good way.
Here is my prediction. Tomorrow, someone could start a thread stating that the sun is yellow. And others would come along to not only argue against that statement but introduce statements designed to belittle others.
Agreed. I couldn’t decide whether to laugh, cry, or electrocute myself. But in the end I was too confused where to connect myself in the circuit to get the job done…I am sorry for you being an electrician. Living in a world where everyone thinks they know as much as you do. Sucks ass and not in a good way.
Did you know that you are only seeing the color that is reflected off an object and that the true colors are the opposite of what you are seeing?
High amp stuff scares me. Both of these setups were in the +200A range, lower unit is sketchy chinese shit. Think the top was 575V, lower 460V. eta: lower was 480v service stepped down to 220 now that I think about it. Enclosure just had a magnetic panel for a cover.
Last edited:
You moron its Blue Green!
What Color is the Sun?? | Total Solar Eclipse 2017
Total Solar Eclipse 2017 - On Monday, August 21, 2017, all of North America will be treated to an eclipse of the sun. Anyone within the path of totality can see one of nature’s most awe inspiring sights - a total solar eclipse. This path, where the moon will completely cover the sun and the...
eclipse2017.nasa.gov
All this talk of electricity got me to remembering these lyrics.I am sorry for you being an electrician. Living in a world where everyone thinks they know as much as you do. Sucks ass and not in a good way.
"I got chills, their multiplying. And I'm losing control from the power that your supplying. It's electrifying!"
I'm digging that green heat shrink to identify B phase. I guess in Wuhan they just use whatever they have on hand.
Mike
BTW, the back story was that this elephant was on Coney Island in the early 1900's but was ill-tempered. It killed at least three visitors and injured lots more. Thomas Edison (promotor of DC power for the growing national grid) used Westinghouse's AC power to electrocute the elephant in a public attempt to make Westinghouse power look dangerous.
Backfired... everyone turned on Edison for frying the poor elephant... And turned out this performance also indirectly invented the electric chair at the same time, because people thought electricity was more humane than hanging.
The short version is that the elephant had it coming.
Sirhr
Worked 40 + years as an industrial/commercial electrician, all boils down to how and when you want to die.
Yep. A lot of people tend to think of shock/electrocution when the topic of electricity is discussed. Shock is a concern... but arc flash/blast scares me a whole lot more... That shit will kill you from a distance without ever having touched anything.
One "old guy" I worked with as an apprentice rolled up his sleeves and showed me the scars and told me about his time in the burn unit.
Mike
Yup. It's been interesting watching the industry change from the mid 90s when I got out of the Navy and into civilian work. I left the electrician work behind a while back, been doing the power plant operation gig for a couple decades now. Still do low and high voltage switching... never had a close call, and honestly kind of miss the thrill of the crackle-snap of opening a high voltage switch... but the part of me that wants to make it to retirement appreciates the MODs and breaker robots on the job today.
Volts is the pressure. Amps is the flow rate or gallons per minute. Ohms is the weight of the load you're trying to move combined with line/orifice size
