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Ground wire

AnswerIt's a (lightning) protection wire, designed to protect the line conductors from lightning strikes.
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What is the function of a earth wire in transmission line?

The earth conductor is not normally used for communications, but the line conductors frequently are. Often 'communications' has nothing to do with telephone conversations, but more to do with data transmission - usually related to protective systems for the lines themselves. To prevent these communications signals from straying to other parts of the electrical transmission/distribution network, the ends of the conductors used for this purpose are fitted with inductors which offer a high impedance to the high-frequency communications signals, effectively blocking the signals from going further into the network.


How do you do staircase wiring?

A two way switch is required for staircase wiring. A staircase switch will have two terminals. Connect the line wire with the center terminal. Connect the two ends of a wire with the top two terminals and two ends of a wire with the bottom two terminals. The line wire at the center terminal can now be connected with one terminal of the light bulb or light holder.


Where should the Doctype be placed on the webpage?

A doctype is a header, so it should be placed at the top of the webpage. When writing HTML for a website, it should be placed directly above the tag.


Explain how to apply tinning technique in soldering?

Strip the wire to desired length. Then hold the wire horizontally and hold the soldering iron underneath the stripped part while holding the solder on the top of the wire. When the wire gets hot enough it will suck the solder into the wire


Why do power transmission lines not have neutral conductor?

No neutral is necessary, because the transmission line's line currents are roughly balanced and, so, the phasor sum of those currents will be relatively insignificant, rendering the need for a neutral conductor to be an unnecessary expense. In practise, for most transmission towers, each of the three 'lines' comprises not just a single conductor but, rather, a number of conductors which are bundled together in order to reduce electric stress surrounding the line. The number of conductors per bundle increases with transmission voltages. In the UK, for example, 400-kV transmission lines normally comprise bundles of four conductors, whereas 275-kV transmission lines normally comprise bundles of two, and 132-kV lines just one. Running along the top of transmission towers is an earthed conductor, called a 'guard conductor', whose function is to protect the lines from lightning strikes during electrical storms. Many transmission towers also have two, separate, three-phase circuits -one circuit on each side of the tower. But, definitely, no neutral!

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