Comments by "GH1618" (@GH-oi2jf) on "The Engineering Mindset" channel.

  1. The center tap is called “neutral” by the manufacters of transformers, by linemen, by manufacturers of load centers, and by electricians. You can find that usage everywhere.
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  2. We are practical people. This is industrial equipmnt. It doesn’t need to look sharp, it just has to work well.
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  3. I did not hear “high line” in this video. What do you mean by that?
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  4.  @raportmercado1165  — That is outside the scope of this video.
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  5. Drugz Undisputed — No. You may turn circuits on or off as you please.
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  6. GEORGE — The neutral is held at ground potential. You don’t feel current in a wire. You feel current that leaves the wire and goes through you. That will only happen if there is a potential difference between the wire and the thing you are standing on.
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  7. Andrew Zenn — It is single phase 240V with a center tap neutral. Or a 3-wire 240/120V system. Or a North American system. Call it whatever you want. As long as you know how it works, the name doesn’t matter.
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  8. I agree. Why use AC terminology in a battery circuit? Why use a battery in a discussion of AC?
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  9. They are wound in the direction that works.
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  10. It would probably be a code violation to use a UK receptacle, even if it were electrically compatible.
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  11. Free electrons do move quickly, but they are moving all over the place. In the presence of a potential difference, there will be a net movement, called drift, and that is relatively slow. Free electrons cannot move very far in one half-cycle. The moving charge interacts with the field. It is the field that transfers the energy.
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  12. Correct. One of several errors in this video.
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  13. A Residual Current Circuit Breaker may protect against only faults to earth, as I read about it. An Arc Fault Circuit Interrupter detects arcing within the circuit which is not a ground fault. A loose wire, for example, can arc without a ground fault.
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  14. The neutral wire is at ground potential. To be electrocuted, you must touch two conductors which have a high potential difference between them, so Earth and neutral doesn’t do it. Neutral and one of the hot lines will, however.
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  15. We have never used Imperial units in the US. We use US Customary units (and Metric units).
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  16. YotaXP — For one thing, you couldn’t have a GFCI to detect faults. The GFCI protects you if you are carrying current.
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  17. The direction of the current is irrelevant. “Neutral” is the wire that is tied to ground. “Hot” is not.
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  18. dubyajayyo — The ground wire in the circuit will generally be copper and the same gauge as the other wires. It is more conductive than the human body. If you are touching the exposed metal parts of the system, such as the breaker box, then some event applies voltage to those metal parts, you want the resulting current to be carried to ground through the ground wire, not through your body.
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  19. That’s not correct. Electrons are charge carriers. You have to have moving charge to have electric current. They don’t move far in a half-cycle, but there must be a net movement of charge.
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  20. Unfortunately, “conventional current” was defined before the discovery of the electron.
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  21. The ground and neutral are connected at the main panel.
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  22.  @johnjones8412  — Your point is unclear. Power does come from the power company.
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  23.  @johnjones8412  — The electric power is produced in dams, or byr burning coal or natural gas, or in fission reactors. It can also be produced by wind turbines or solar panels. No energy is created, it is merely converted to electric energy from other forms of energy.
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  24. A NEMA 10-50 range connection (3-pin) has a neutral, but no ground. Newer installations should use a 4-pin connector with a separate ground. Are you saying the bare wire is in your household wiring?
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  25. Current is how many electrons are flowing per unit time. One Ampere is one Coulomb of charge per second.
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  26. It’s North American. The distribution network is 3-phase. Residential service is as shown here, derived from a single phase of the distribution network. Three-phase service is available, but that is a separate topic.
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  27. Devin Doiron — There is no discussion of 3-phase ar 5:03.
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  28. The presenter uses “grid” to refer to the transmission network, which is much higher voltage. I don’t see where he uses “A” and “B” so your question is not clear to me. You don’t have voltage at the “end” of a line. Voltage is a measure of potential difference between two points. The voltage of the distribution network is typically a few thousand volts to ground.
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  29. Yes, that is an error.
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  30. Yes, they do, but not very far in AC. The electrons are charge carriers. You have to have moving charge to make a magnetic field. Conductors enable electric current because they contain loosely bound electrons which can be dislodged by electromotive force.
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  31. It should mean the opposite. If your wiring was done correctly, the potential from neutral to ground should always be negligible.
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  32. North America, not just USA.
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  33. hasib reza — You must not use that outlet type for 240V.
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  34. I’ve seen lightning in California.
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  35. Do you even have a neutral?
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  36. A hydroelectric generator comprises a turbine, a rotor, and a stator. The turbine is caused to rotate by the flow of water. The rotor contains coils of wire which are energized to make an electromagnet. The rotor is caused to turn by the turbine. The rotor turns inside the stator, which contains more coils. The rotation of the electromagnet next to the stator coils induces an AC voltage in the coils, which causes power to be distributed through the network of transmission lines.
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  37. Fellzer — Think of two lumberjacks cutting down a tree with a long saw. They alternate pushing and pulling.
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  38. You just need a converter which plugs into the Vietnamese system and delivers 120v to a US-style receptacle. Be sure it is rated for the tools you intend to use.
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  39. Yes, it is a primitive model which is different from the modern model. There is some misinformation when he tries to give a physical description of what is happening. It isn’t necessary to understand the physics of electricity in order to make practical use of it. I think it is better to just use a practical model which does not pretend to be a physical model, than to present an incorrect physical model, but the owner of the channel may do what he pleases with it.
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  40. A current flows through the person to ground, as shown. The neutral of the system is connected to ground.
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  41. A motor uses electricity; a generator or alternator produces electricity. You should study the experiments of Œrsted and Faraday (and others).
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  42. They are mathematically equivalent. Which you prefer is just a way of looking at. It makes no difference, so it is just pedantry to insist on one view.
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  43. Ralph Averill — The legs (hot wires) are not connected to phases. The primary of the transformer is connected across any two phases of a 3-phase distribution line. The secondary of the transformer produces single phase, 240V power. The secondary is tapped in the middle and used as the neutral, which gives two 120V single phase power sources. The two 120V legs have opposite phase.
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  44. The current flows through both wires at the same time, reversing direction 120 times per second. As far as the circuit is concerned, both wires are equivalent. The current moves back and forth in the circuit. I wish people would stop using the term “return,” which just confuses novices. “Live” (or “hot”) means that a wire has a significant electric potential relative to ground. “Neutral” means a conductor that is tied to ground potential.
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  45. You should use the proper NEMA connector for a 240V circuit.
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  46. Dialectical Monist — The center tap in the transformer secondary is not a short because of the resistance (actually impedance) of the wires in the secondary. The secondary can be thought of as two 120V transformer secondaries connected in tandem.
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  47. It is a code for the value of resistance.
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  48. The transformer case is connected to neutral, so you don’t need an insulated bushing for the neutral wire.
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  49. There is a potential difference between cloud and Earth. It doesn’t matter which one you call the source.
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  50. Do not bond the neutral in a subpanel.
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