That was a great video! I'm trying to get a soon to be graduating high school senior that I know to get into the electrical trade or another. These elementary formulas are important and essential to beginners and us old timers as well. Thanks for keeping us on track!
You're the best channel and source of electrical information out there,brother. I plan on being a master one day so I appreciate every piece of information. Love the merch too, I hope to see some EU tool belts some day.
A little much for early loaners. Either E or V is/can be used for voltage. A or I is/can be used for current. This causes early loaners some confusion? Thank you.
The current in a series circuit is NOT constant. It can change with thermal effects and inrush current. What you actually mean is that in a circuit comprising only series connected loads the current is the same all the way around. That is, current isn't lost from that circuit unless you introduce a node. And then the currents can be analysed at that node using Kirchoffs Current Law.
Wrong. Kirchoff's current law is not about the current being constant, it is to do with the currents entering and exiting a node. It says that the sum of the currents entering the node (or junction) is equal to the sum of currents exiting. That is I1 + I2 + I3 +... =0 So what you do then is ascribe a direction to each current. Currents going in have a positive sign, currents coming out of the node have a negative sign. (You can even do it the other way around but it's more natural to assign positive values to currents going in). So another way of stating Kirchoffs Current Law is: the sum of currents into a node are equal and opposite to the sum of the currents exiting a node.
Large scale constant current circuits exist as well - the two main applications being airfield lighting and street lighting. They're most often 6.6A but they can be 20A as well. I own a company (OV20 Systems) that supplies the series street lighting market. Most electricians don't realize series street lighting still exists. I geek out on this stuff all day so if anyone knows of any series street lighting, or if you have questions, feel free to reach out!
Thank you very much, educative. Please sir, my neutral is disconnected, but there is still supply present. But it's getting high and low like crazy. With the neutral, lts low
Hello Dustin, I just found your channel recently, great content and was wondering if your videos cover codes in the Canadian electrical code. If it does not do you know a RUclipsr that specifically explains Canadian electrical code for apprentices?
I'm an electrical contractor in state of Florida had my Florida electrical contractors license for 40 years continuing education every two years I had all Electrical formulas that pounded into my brain where I could do it in my sleep, I like going from 3 phase I going to Delta 3 wye phase efficiency factor Do that my sleep too
DUSTIN, it would have been nice if you would have shown the formulas of converting wattage into dissipation of light and heat and stored joules because its different formulas. Voltage multiplied by current = wattage power ( not dissipation of heat, light or stored joules ) When a capacitor is storing current you can't use this formula V*I = stored voltage/stored current, for lamps dissipating light you can't use this formula V*I = lamps dissipating light, for resistors dissipating heat you can't use this formula V*I= for resistors dissipation heat. Batteries are dissipating chemical converting it to a DRAIN current but you can't use the formula V*I = The Battery dissipating drain energy. Try to make another video showing the correct formulas to convert power wattage into heat, light, stored joules.
So... you're getting the same amperage through each component? So regardless of whether the resistor is 2 ohms or 4 ohms, the amperage (number of electrons through the component per second) is the same? This sounds counter intuitive.
I deal primarily with 6.6A series lighting circuits - yes, the 6.6A is constant around the loop, and devices need to be rated for that, as well as up to 5000V (series street lighting circuits can exceed 4500V to feed all the loads!) As I tell customers all the time, a lot of what you know about electricity is completely opposite when dealing with series. I don't deal with resistors or heating elements on series... mainly inductive loads. And these large circuits are run by Constant Current Regulators (CCRs) that automatically adjust to maintain 6.6A.
Understand the principles of "Series Rules" you talked about. Is this the reason a Series Rated panel can have lower AIC ratings in the branch breakers as long as the main breaker is rated for the specified AIC rating?? Never understood why some Engineers will not allow panels that are series rated.
No. In a series circuit where loads are genuinely in series the current through each load is the same. The cable is required to hand that current. So the breaker much match the cable rating or less. So no, series connected loads/circuits do not lower the breaker rating. They can't. If you lowered the breaker rating then it would trip.
In your diagram, why use such odd values? 50VDC... 4 ohm, 2 ohm... 🤨😣 Should have used a 240VAC power supply and 2 different baseboard heaters, (750w and 1250w) for example. And that way, you could have explained the reason why ; 2 baseboards heater ( 750w + 1250w ) connected in serie dont work the same as one baseboard of 2000w. Yes i understand that there is voltage drop between the two, but the two resistance are supposed to act like if it was only one.. The more baseboards you add, the less heat each one generates..🤨🤔
Series circuits work like if the whole of parliament hold each others hand to walk into the theater. If the person lets go the hands then the whole line stops.
Construction electricians dont need this knowledge. The only time we put devices in serie, is when we need to open or close a circuit, or a part of it. Switches, contactors, relays, etc... Please focus on knowledge worth learning.
That was a great video! I'm trying to get a soon to be graduating high school senior that I know to get into the electrical trade or another. These elementary formulas are important and essential to beginners and us old timers as well. Thanks for keeping us on track!
Thanks Dustin, we just did series, parallel, series + parallel in my pre-app course. Great stuff and thanks.
Series circuits: when one light goes out, _THEY ALL GO OUT!!!_
Xmas lights are fun! Especially ones from the 80s
That's because it becomes an open circuit....the more you know🌈🌠🤓
You're the best channel and source of electrical information out there,brother. I plan on being a master one day so I appreciate every piece of information. Love the merch too, I hope to see some EU tool belts some day.
A little much for early loaners. Either E or V is/can be used for voltage.
A or I is/can be used for current. This causes early loaners some confusion? Thank you.
Nice refresher
The current in a series circuit is NOT constant. It can change with thermal effects and inrush current.
What you actually mean is that in a circuit comprising only series connected loads the current is the same all the way around. That is, current isn't lost from that circuit unless you introduce a node. And then the currents can be analysed at that node using Kirchoffs Current Law.
Bruuuhh this nigha extra
Thanks for the fun video. I'm looking forward to when you get in to capacitance and inductance.
Never hurts to hit the fundamentals!
A video on pool bonding would be great
Wrong.
Kirchoff's current law is not about the current being constant, it is to do with the currents entering and exiting a node.
It says that the sum of the currents entering the node (or junction) is equal to the sum of currents exiting.
That is I1 + I2 + I3 +... =0
So what you do then is ascribe a direction to each current. Currents going in have a positive sign, currents coming out of the node have a negative sign. (You can even do it the other way around but it's more natural to assign positive values to currents going in).
So another way of stating Kirchoffs Current Law is: the sum of currents into a node are equal and opposite to the sum of the currents exiting a node.
Thank you Dustin 👍⚡
Large scale constant current circuits exist as well - the two main applications being airfield lighting and street lighting. They're most often 6.6A but they can be 20A as well. I own a company (OV20 Systems) that supplies the series street lighting market. Most electricians don't realize series street lighting still exists. I geek out on this stuff all day so if anyone knows of any series street lighting, or if you have questions, feel free to reach out!
Thank you, man I appreciate👍🏽
Thank you very much, educative.
Please sir, my neutral is disconnected, but there is still supply present. But it's getting high and low like crazy. With the neutral, lts low
Hello Dustin, I just found your channel recently, great content and was wondering if your videos cover codes in the Canadian electrical code. If it does not do you know a RUclipsr that specifically explains Canadian electrical code for apprentices?
I'm an electrical contractor in state of Florida had my Florida electrical contractors license for 40 years continuing education every two years I had all Electrical formulas that pounded into my brain where I could do it in my sleep, I like going from 3 phase I going to Delta 3 wye phase efficiency factor Do that my sleep too
Can these formulas be used to determine which light in a string of Christmas lights that are wired in series, is the one bulb that is no good?
thank you so much
Any plans to offer certified ELO’s in Washington state?
Just saved me thanks
DUSTIN, it would have been nice if you would have shown the formulas of converting wattage into dissipation of light and heat and stored joules because its different formulas. Voltage multiplied by current = wattage power ( not dissipation of heat, light or stored joules ) When a capacitor is storing current you can't use this formula V*I = stored voltage/stored current, for lamps dissipating light you can't use this formula V*I = lamps dissipating light, for resistors dissipating heat you can't use this formula V*I= for resistors dissipation heat. Batteries are dissipating chemical converting it to a DRAIN current but you can't use the formula V*I = The Battery dissipating drain energy. Try to make another video showing the correct formulas to convert power wattage into heat, light, stored joules.
So... you're getting the same amperage through each component? So regardless of whether the resistor is 2 ohms or 4 ohms, the amperage (number of electrons through the component per second) is the same? This sounds counter intuitive.
I deal primarily with 6.6A series lighting circuits - yes, the 6.6A is constant around the loop, and devices need to be rated for that, as well as up to 5000V (series street lighting circuits can exceed 4500V to feed all the loads!) As I tell customers all the time, a lot of what you know about electricity is completely opposite when dealing with series. I don't deal with resistors or heating elements on series... mainly inductive loads. And these large circuits are run by Constant Current Regulators (CCRs) that automatically adjust to maintain 6.6A.
Lights in old school were wired in series. When one burned the resistance is infinite. So all lights go out.
Understand the principles of "Series Rules" you talked about. Is this the reason a Series Rated panel can have lower AIC ratings in the branch breakers as long as the main breaker is rated for the specified AIC rating??
Never understood why some Engineers will not allow panels that are series rated.
No.
In a series circuit where loads are genuinely in series the current through each load is the same. The cable is required to hand that current.
So the breaker much match the cable rating or less.
So no, series connected loads/circuits do not lower the breaker rating. They can't. If you lowered the breaker rating then it would trip.
You wrote 13.3 instead of 33.3 in your P2 formula
8.3x4 is 33.2??
When one lamp burns out. These seies go infinity. No lamps go out.
In your diagram, why use such odd values?
50VDC... 4 ohm, 2 ohm... 🤨😣
Should have used a 240VAC power supply and 2 different baseboard heaters, (750w and 1250w) for example.
And that way, you could have explained the reason why ; 2 baseboards heater ( 750w + 1250w ) connected in serie dont work the same as one baseboard of 2000w.
Yes i understand that there is voltage drop between the two, but the two resistance are supposed to act like if it was only one..
The more baseboards you add, the less heat each one generates..🤨🤔
Theory book 📙
Series circuits work like if the whole of parliament hold each others hand to walk into the theater. If the person lets go the hands then the whole line stops.
Video is good, info is good, music is annoying af.
They are serial circuits. Not series circuits.
Then you get the paralell circuits where the math becomes a different ballgame 😑
Construction electricians dont need this knowledge.
The only time we put devices in serie, is when we need to open or close a circuit, or a part of it.
Switches, contactors, relays, etc...
Please focus on knowledge worth learning.