I think I'm going to try to watch every video you've put out! So far all great and learning more than I'd think I would by the titles even! Awesome teacher!
Thank you for that excellent, and properly labeled demonstration. It never hurts to refresh the memory and specially with well explained and organized content.
JERSEY MIKE, Make a few video lessons about ghost voltages, residual current short circuits and Parasitic Draw short circuit test. The ghost voltage is higher is value when the wire insulation resistance gets lower. Go over what is Residual Current VS Parasitic Draw current about the differences and what they are.
It's really not counterintuitive at all, though right it's just Ohms law and how you would expect a circuit to behave. Certain things about electricity can be counterintuitive, but I don't think this is one of them, this is circuits 101, really.
Golden rules, golden rule number one voltage is the same across all parallel branches.Golden rule number 2.The current is the same anywhere in a series circuit.Golden rule number 3, voltage across current fruit
Ohm's my goodness! Great explanation, demonstration, and knowledge (as always). BTW, only a brief ad at the beginning (≈2 minutes in). Looking forward to the next notification. Hopefully others that have viewed your content are sharing it with someone new to HVAC, struggling, or just as a refresher. Any hints for what is coming next? (M∆π¥ Th∆πk§) 🤜🏽💥🤛🏽
Hahaaaa..saw what you did there with the Ohms. lol. There was an ad only 2 minutes in? If so, that wasn't me. That's RUclips. Don't like that. I'll have to look into it. Thanks for letting me know.
Thanks Mike, If I was to measure throughout this circuit referencing ground instead of directly across each component, then would I be able to read voltage drop aswell?
You want your probes to stay as close to the component on both sides as you can to eliminate any stray readings from other components in the system. Measuring to ground would open you up to inaccurate readings to work off of.
Mike, sometimes going back to the basics is a good way to better understand the readings we see on a multimeter. It is easy to look at a reading and compare it to what service literature states but it is better to know how the reading is derived. You definitely missed your calling. It should be Jersey Mike, Professor !
Service literature is always a great resource, but it isn't always available or easy to find. I'll pass on the professor title! I like to keep it in the trenches. :)
Hey Mike, just curious. If you were to wire the resistor and contactor, or 2 contactors in parallel instead of in series wouldn’t that would keep the voltage the same and, allow both cofactors in the circuit to close at the same time?
So the volt meter shows a difference in voltage the resistor is stopping a lot of electricity, hence the higher voltage reading from one side of the resistor to another. Im asking because in a psc motor, the less resistance winding is a higher speed.
There are literally dozens of videos covering that exact subject on RUclips if you do a search. While perhaps done by someone other than Mike, I'm certain one of them will be a good fit for you.
@@realSamAndrew Thanks, the issue isn't the mystery of the contactor but to us non-electrically trained the entire language of electricians creates a loose end when a new term is entered it just adds to the confusion. For example what was the volts needed to activate the contactor? And why did the resistor seem to pass 100% of the volts, the contactor seemed to pass 100% of the volts but in series the system fails. I clearly see that demonstration. I hear it split the voltage. However the logic seems to say it passed 100% earlier and now it doesn't so what changed. It is more about trying to follow the logic. For example if the ( video at 1:31 ) 28.35 volt transformer passed 28.35 volts after subtracting a loss of 992 ohms what did the resistor do if anything? It is a great demonstration however the logic of why or how it split eludes me. The answer that it split fits the demo, so it leaves a logical confusion. This is a great demo.
@@whatsup3270 this is a broad expansion of your original question which was comparing contactors to relays. On that topic I myself have watched several videos that you could also find. On the rest of it, these topics are also covered by various electrician or HVAC channels. You may have to piece together several to hit every question, but the repetition will help you. Try AC service tech, John Jennings, HVAC School, Ty Brannaman, Word of advice TV , channels for starters. Then you will likely see other choices suggested to you on the same topics from those videos.
Resistance does not resist voltage. It resists current. The slower the current, the easier it is for the transformer to steadily supply 24v through the resistor. The less resistance to current there is, the more of a draw there is on the transformer (amps), and if the resistance is low enough, the amp draw becomes high enough that the transformer cant keep up supplying volts and you see a voltage drop. The resistor passed on all of the voltage because the resistance is so high that the transformer was sort of trying to push its 24v through it like a big water pump pushing water through a very tiny 1/2" hose. The pump (transformer) can easily keep water (voltage) flowing though it. The problem is when you add another resistor in the circuit (like the contactor). The contactors resistance is massively lower than the 1000 ohm resistor. It's only 12 ohms. So think of the contactor like a 12 inch round water pipe that needs to be full for the contactor to close. While the 1000 ohm resistor is just a tiny 1/2 inch hose. What happens when you put both of these hoses together and try to feed water evenly through a 1/2" hose and a 12" round water pipe? You wont get an even flow all the way through (volts). The 1/2" pipe will be full of water (volts) under a lot of pressure (resistance) but will move slowly (current), but in the 12" round pipe, it is just a trickle of water (volts) under little pressure (resistance) and moving too quickly (current) to fill the pipe enough to close the contactor. That's why you get a voltage drop on the contactor and the contactor doesn't close, even when you see full voltage across the resistor.
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Excellent teacher
I think I'm going to try to watch every video you've put out! So far all great and learning more than I'd think I would by the titles even! Awesome teacher!
Your Presentation is amazing, this was super clear and helpful. Thank you
I must’ve done that 100 times in trade school and the way you just explained it. It just contacted in my brain. Thank you.
Thank you for that excellent, and properly labeled demonstration. It never hurts to refresh the memory and specially with well explained and organized content.
Fantastic explanation. Thank you for this, your teaching style is great.
Excellent training how to use your multimeter. As an ATT tech we seldom used a digital one we were issued analog meters.
Thanks!
Mike, you continue to amaze me with your informational videos simplifying the trade.
Thanks Mike! Another great video explaining the electrical side of the trade. As a student these videos help tremendously!
Great content! Interesting stuff as usual, thanks, Mike
Thank you, brother.
Great video mike. Always enjoy your content. Take care
JERSEY MIKE, Make a few video lessons about ghost voltages, residual current short circuits and Parasitic Draw short circuit test. The ghost voltage is higher is value when the wire insulation resistance gets lower. Go over what is Residual Current VS Parasitic Draw current about the differences and what they are.
Excellent lesson Mike, your videos are very helpful.
Thanks for Mike for an other great class.
Great demonstration!!!
Most useful and clever explanation.Thanks.
Thanks for the information.
👍👍
Great explanation thank you
Super useful info. Thank you
Thx again
Good info.
Very counterintuitive.. Thanks
It's really not counterintuitive at all, though right it's just Ohms law and how you would expect a circuit to behave. Certain things about electricity can be counterintuitive, but I don't think this is one of them, this is circuits 101, really.
Thanks Mike .
Youre welcome
A great explanation, thankyou
Golden rules, golden rule number one voltage is the same across all parallel branches.Golden rule number 2.The current is the same anywhere in a series circuit.Golden rule number 3, voltage across current fruit
Ohm's my goodness! Great explanation, demonstration, and knowledge (as always). BTW, only a brief ad at the beginning (≈2 minutes in). Looking forward to the next notification. Hopefully others that have viewed your content are sharing it with someone new to HVAC, struggling, or just as a refresher. Any hints for what is coming next?
(M∆π¥ Th∆πk§)
🤜🏽💥🤛🏽
Hahaaaa..saw what you did there with the Ohms. lol. There was an ad only 2 minutes in? If so, that wasn't me. That's RUclips. Don't like that. I'll have to look into it. Thanks for letting me know.
👍
Thanks Mike, If I was to measure throughout this circuit referencing ground instead of directly across each component, then would I be able to read voltage drop aswell?
You want your probes to stay as close to the component on both sides as you can to eliminate any stray readings from other components in the system. Measuring to ground would open you up to inaccurate readings to work off of.
I think i know all i need to know but i have never watched a multimeter tutorial before but lets see
Mike, sometimes going back to the basics is a good way to better understand the readings we see on a multimeter. It is easy to look at a reading and compare it to what service literature states but it is better to know how the reading is derived. You definitely missed your calling. It should be Jersey Mike, Professor !
Service literature is always a great resource, but it isn't always available or easy to find. I'll pass on the professor title! I like to keep it in the trenches. :)
Ok, then it’s platoon leader Mike!
@elgkas9928 Now that's more my style!
Hey Mike, just curious. If you were to wire the resistor and contactor, or 2 contactors in parallel instead of in series wouldn’t that would keep the voltage the same and, allow both cofactors in the circuit to close at the same time?
Yes, that's correct. In parallel you'd have full voltage to both components
So the volt meter shows a difference in voltage the resistor is stopping a lot of electricity, hence the higher voltage reading from one side of the resistor to another. Im asking because in a psc motor, the less resistance winding is a higher speed.
Conductance is the reciprocal of resistance. G = 1/R
I wish the contactor was explained, and the difference between a contactor and a relay.
They both basically do the same thing. One circuit when powered closes a switch that activates another circuit.
There are literally dozens of videos covering that exact subject on RUclips if you do a search. While perhaps done by someone other than Mike, I'm certain one of them will be a good fit for you.
@@realSamAndrew Thanks, the issue isn't the mystery of the contactor but to us non-electrically trained the entire language of electricians creates a loose end when a new term is entered it just adds to the confusion. For example what was the volts needed to activate the contactor? And why did the resistor seem to pass 100% of the volts, the contactor seemed to pass 100% of the volts but in series the system fails. I clearly see that demonstration. I hear it split the voltage. However the logic seems to say it passed 100% earlier and now it doesn't so what changed. It is more about trying to follow the logic. For example if the ( video at 1:31 ) 28.35 volt transformer passed 28.35 volts after subtracting a loss of 992 ohms what did the resistor do if anything? It is a great demonstration however the logic of why or how it split eludes me. The answer that it split fits the demo, so it leaves a logical confusion. This is a great demo.
@@whatsup3270 this is a broad expansion of your original question which was comparing contactors to relays. On that topic I myself have watched several videos that you could also find. On the rest of it, these topics are also covered by various electrician or HVAC channels. You may have to piece together several to hit every question, but the repetition will help you. Try AC service tech, John Jennings, HVAC School, Ty Brannaman, Word of advice TV , channels for starters. Then you will likely see other choices suggested to you on the same topics from those videos.
Resistance does not resist voltage. It resists current. The slower the current, the easier it is for the transformer to steadily supply 24v through the resistor. The less resistance to current there is, the more of a draw there is on the transformer (amps), and if the resistance is low enough, the amp draw becomes high enough that the transformer cant keep up supplying volts and you see a voltage drop.
The resistor passed on all of the voltage because the resistance is so high that the transformer was sort of trying to push its 24v through it like a big water pump pushing water through a very tiny 1/2" hose. The pump (transformer) can easily keep water (voltage) flowing though it. The problem is when you add another resistor in the circuit (like the contactor). The contactors resistance is massively lower than the 1000 ohm resistor. It's only 12 ohms. So think of the contactor like a 12 inch round water pipe that needs to be full for the contactor to close. While the 1000 ohm resistor is just a tiny 1/2 inch hose.
What happens when you put both of these hoses together and try to feed water evenly through a 1/2" hose and a 12" round water pipe? You wont get an even flow all the way through (volts). The 1/2" pipe will be full of water (volts) under a lot of pressure (resistance) but will move slowly (current), but in the 12" round pipe, it is just a trickle of water (volts) under little pressure (resistance) and moving too quickly (current) to fill the pipe enough to close the contactor.
That's why you get a voltage drop on the contactor and the contactor doesn't close, even when you see full voltage across the resistor.