Single wire passing through a tube
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I would like to ask everyone: if a 2mm thick live wire (L) with a voltage of 220V is inserted into a single iron conduit and embedded in the wall, and then a light bulb is connected to it, will the electricity meter spin faster? Will more electricity be consumed? ? ? ? ? ? ? ? :handshake
It’s possible, as a single wire inside an iron tube generates a magnetic field that causes the tube to heat up. When a light bulb is connected, an electric current flows through this circuit; for these reasons, more energy is lost, and more electricity is consumed. Therefore, the use of a single-core wire inside iron tubes is not recommended.
What was said upstairs makes some sense. But it always feels like something is missing? I don’t understand what the original poster means? How does a single tube form a circuit? :Loveliness: Even when it forms a circuit, I think the current should decrease. Since the wire conduit functions as a magnetic circuit load, it’s obvious that the resulting lighting effect requires more power. But the load should decrease per unit of time. Is it that the brightness of the light bulb isn’t enough? (Guessing: $ )
When a wire is passed through a tube alone, the magnetic flux generated by the current in it passes through the walls of the steel tube. The losses due to alternating magnetic flux in ferromagnetic materials include eddy current loss and hysteresis loss. Due to the skin effect of magnetic flux, eddy current losses are primarily concentrated on the surface of steel components, causing the steel pipe to heat up. If the three wires ABC pass through the same conduit, then the current (with a vector sum of zero) is A+B+C=0. Therefore, no magnetic field will be generated, and the steel pipe will not heat up.
According to the standards, a single AC wire must be enclosed in a metal tube.
Thank you all. Should I connect a ground wire separately to the steel pipe? Will it be useful?
It’s useless; you can simply run the two wires of the single-phase system through a tube to ensure that no magnetic eddy currents are generated.
Individual wires are not allowed to be installed inside steel pipes. When alternating current flows through a wire, a magnetic field is generated around it, resulting in eddy currents that can cause the wire to overheat. Wires of different voltage levels are also not permitted to be placed inside the same pipe.
First and foremost, it should be clear that a single wire is not allowed to be placed inside a steel pipe. It is clear that wires heat up because an electric current flows through them, causing eddy current losses in the metal conductors; when there is no current, they do not heat up. It hinders the increase in current when eddy currents are generated. So the total electricity consumption will not increase.
Could the poster be the construction party? . There’s always the suspicion of cutting corners. . Hehe
When I first graduated from school, I worked for a while in a construction company, learning about electrical and plumbing work. A colleague of mine told me that he had to deal with unpleasant landlords who were stingy and would deduct money from his pay; they also made the landlord pay more for utilities, and the carpenters wasted expensive materials on paneling, while the painters applied paint to things like toilets in a careless manner. I feel it’s unethical, but I haven’t figured it out, so I’m asking.
Will the total electricity consumption increase by doing this?
What was said on the fourth and ninth floors makes sense; according to the regulations, a single wire is not allowed to be inserted directly into a steel tube.
Follow the construction specifications strictly; do not act recklessly. It is not allowed to pass individual AC wires through pipes.
Why do temporary power installations (and this is not a temporary installation) always pose many safety risks? The root cause lies in a desire to save effort, avoid hassle, and cut costs; as a result, protective wires are often not connected, with the idea that as long as the motor runs and the lights shine, it’s fine； The original poster is even more extreme – they want to skip the neutral wire in the wiring as well. I wonder what could be used as a neutral wire; is it a steel pipe? Have they considered the potential risks associated with that?
Very well explained: handshake
It is not allowed to pass a single AC wire through a conduit
It is not allowed to run a single live wire through a conduit. It is also prohibited by regulations.
It is not permitted per the specifications to run a single live wire in a conduit! ! !
Useful, thank you!!!!!!!!!!!!!!!!!!