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What happens if a wire is longer?
When the length of wire is longer, the current has to travel more distance and face more obstacles. With the length, resistance increases. The space of the elctrons to travel increases when cross sectional area is increased.
Does wire size affect voltage?
Any length or size of wires will have some resistance, and running a current through this dc resistance will cause the voltage to drop. As the length of the cable increases, so does its resistance and reactance increase in proportion. This condition causes the load to work harder with less voltage pushing the current.
Does electricity lose voltage over distance?
The transmission over long distances creates power losses. The major part of the energy losses comes from Joule effect in transformers and power lines. The energy is lost as heat in the conductors. The overall losses between the power plant and consumers is then in the range between 8 and 15%.
Do extension cords reduce voltage?
Long extension cords can cause significant drops in voltage to appliances. Anything that resists the flow of electricity causes voltage to drop. Whether an extension cord causes a noticeable or significant voltage drop depends on the length and gauge of the wire and the appliance plugged into it.
How far can you run electrical wire?
As an example, for a 120-volt circuit, you can run up to 50 feet of 14 AWG cable without exceeding 3 percent voltage drop….For 240-volt circuits:
| 14 AWG | 100 feet |
|---|---|
| 12 AWG | 120 feet |
| 10 AWG | 128 feet |
| 8 AWG | 152 feet |
| 6 AWG | 188 feet |
How does size affect resistance?
The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through. This will continue to apply no matter how thick the wire is.
Why does high voltage reduce power loss?
The primary reason that power is transmitted at high voltages is to increase efficiency. As electricity is transmitted over long distances, there are inherent energy losses along the way. The higher the voltage, the lower the current. The lower the current, the lower the resistance losses in the conductors.
Why does a shorter wire allow more current?
Hence, voltage across the load reduces. A shorter wire will obviously ‘allow’ more current through it for the same voltage drop.
How does one wire size up affect energy savings?
One Wire Size Up Means Big Savings. Installing wire only one size larger than has been required by the National Electrical Code increases energy efficiency with dramatic paybacks. This simple technique can yield quick paybacks while increasing the flexibility of the installation.
Why do you need a thicker wire when wire length?
To answer your last question, 100 amps at 12V is possible because the wire length is so short. A short wire length results is a very low resistance. Thanks for contributing an answer to Electrical Engineering Stack Exchange!
Why are some wire Gages bigger than others?
Some companies, as a matter of course, specify wire two or three sizes larger than minimum requirements in neutrals, which are often overloaded due to harmonics. Key elements that affect the payback, and thus the economic incentive, to install larger wire gage, are the duty cycle, load factor and electricity price.