I suppose you mean cables, made out of many threads. Those are easier to bend, and thus to install. Also, it may help reduce the skin effect - this is especially relevant at high frequencies.
Conductors are often twisted in opposite directions in order to reduce electromagnetic interference and crosstalk. Twisting the conductors in opposite directions helps to cancel out any induced currents that could affect signal quality. This technique is common in twisted pair cables used for data transmission.
Stranded conductors are more flexible than solid conductors.
Becasue it is too brittle and would break when its bent or twisted
A shielded twisted pair or STP is a copper telephone cable that secures signal-carrying wires inside a conducting shield. It main purpose is to reduce the possibility of electromagnetic intrusion.
Some other words are warped, skewed, or bent.
A modular plug connector and cable assembly comprises a modular plug with a wire holder, and a twisted pair cable. The twisted pairs are braided in order to cross over conductors of the twisted pairs, and furthermore to separate the pairs of conductors and from and in order to reduce inductive and capacitive coupling therebetween. The wire holder helps to keep the pairs twisted and the straightened end portions of the conductors as short as possible. The cable assembly as described provides low cross talk and enables consistent termination with little deviation in the signal transmission speeds.Twisted Pair that is generally used for networking uses "RJ45" connector and twisted pair used in phone lines uses "RJ11".There other RJ (Registered Jack) connectors too for different twisted pairs types.
Two basic types of wire are used: solid and stranded .Solid wires are single strand conductors.Stranded wires are the most common and are made up of a number of small solid wires twisted together to form a single conductor.
Speaker wire is used to make the electrical connection between loudspeakers and audio amplifiers. Usually a twisted pair of conductors are used for speaker cables. This may vary depending on if the speakers are being moved often or just running on the the floor.
To reduce skin effect.CommentHollow conductors are not used on electricity transmission lines. Transmission-line conductors are normally manufactured of stranded aluminium conductors, wound around a steel-wire core. The steel core improves the conductor's tensile strength.Hollow conductors are, though, used as 'wave guides' in radio-frequency circuits. However, their purpose is not to reduce skin effect (in which most of the current flows close to the surface of the conductor), but to save copper -if most of the current flows close to the surface, then there's little point in using solid copper!AnswerHollow conductors are used on very high voltage underground cables, which are cooled by passing oil or gas through the conductors.
In a transmission line, voltage is stepped up to a very high value. This is so as to take advantage of lower line current and smaller conductor size. At these potentials1, however, like charges repel, so most of the current flow is along the skin of the conductor. Stranded conductors, even wound wire over insulating rope, is more efficient, and more cost effective, than solid conductors.--------------------------------------------------------------------------------------------------1 Actually, this effect occurs at any voltage, but it is most notable at the very high voltages used in power line transmission systems.AnswerStranded conductors are used because of their flexibility compared with solid conductors. Normally, transmission lines consist of a steel-wire core (which provides strength) around which are wound stranded aluminium conductors.
It depends on the type of wire and what it's being used for. The two most common types of phone wire, also called twisted pair cable are Cat3 and Cat5 Cat3 contains two twisted pairs (4 wires) most often coloured: Green twisted with Red Yellow twisted with Black OR White/Blue twisted with solid Blue White/Orange twisted with solid Orange Cat5 contains four twister pairs (8 wires) most often coloured: White/Blue twisted with solid Blue White/Orange twisted with solid Orange White/Green twisted with solid Green White/Brown twisted with solid Brown Cat3 can carry 2 separate phone lines and Cat5 can carry up to 4, but can also be used to carry data. A standard phone wire carrying 1 phone line will only use the primary pair being Green/Red or the White/Blue combination. A phone capable of using two lines with a single wire may employ both pairs, the second being the Yellow/Black or White/Orange combination. There is a polarity to the wires as well, known as Tip and Ring. If you find two types of wiring or using different colours, use the following to properly pair them. Tip Ring ----------------------------------- Green Red Yellow Black White/Stripe Solid If you're going to be splicing these wires, its adviced to have no more than 3-4 wires twisted together at a time and properly capped, not just taped up with electrical tape, as it will not hold the wires together securely. As well, some terminal blocks and wallplates use screw down terminals, do not put more than 2 wires on a single terminal as the wires tend to break easily.
twisted pair cable can used as LAN connections....for example CAT5 and CAT6 both twisted pairs.