Specifications of cables are based on the below factors:
- Cable Type
- Temp Range
- Inner Conductor
- vel. of Prop
- Outer Conductor
- shield coverage
- Operating Voltage
- Voltage withstanding capacity
- Nominal Capacitance
- Recommended Connectors
- Min sugg Bend Radius
- Structural return loss
What are the types of cable?
- Unshielded Twisted Pair (UTP) Cable
- Shielded Twisted Pair (STP) Cable
- Coaxial Cable
- Fiber Optic Cable
Shielded twisted pair (STP) is similar to unshielded twisted pair but it contains the extra foil jacket or the copper cover to help the cable from the external interference.
Shielded twisted pair was designed by IBM Company.
It was designed for faster data transfer without any interference.
Because of the high data transfer rate and the extra cover over the cables make this bit costlier compares to Unshielded twisted pair.
These are used in the telephone wiring, business installations etc
Coaxial cables are built using the metal shields and other components over it.
We usually come across this type of wire in the
House, ”these are usually used by the cable TV to connect from antenna to the TV.
It is also used in the telephone companies to connect the central telephone to the poles.
Coaxial cable gained this name because it have one physical channel carrying the signal surrounded around the inner and outer shields sharing the geometric axis.
Coaxial cables is invented by the mathematician named Oliver Heaviside.
This design was patented in the year 1880.
These cables carry the high-frequency electrical signals with very fewer losses.
It was first commercially implemented on the 1940s.
Coaxial cables are also called coax.
The optical fiber is a cable which contains the glass fibers bundled together.
These bundles are protected with a cover made up of plastic.
These are used to transfer the data to a very high distance.
These don’t require a signal refresh or strengthens during transferring of data to a long distance.
They have very high resistance for electromagnetic noise.
They have a very less maintenance cost compared to any cables.
These send the information in the form of light with a very high speed.
These originally developed around the 1950s
Who invented cables
Coaxial cable – was invented by Oliver Heaviside
Fiber optical cable – was invented by Narinder Singh Kapany
Shield Twisted pair cables – was designed by IBM
Unshielded twisted pair cables – was invented by Alexander Graham Bell
How cables are made
Cables are made up of metals like aluminum, coppers etc.
Most of the cables are made up of copper.
Coppers as the high resistance capacity for electromagnetic interference.
These also have high flexibility.
The main stages in creating electrical conductors are
1st stage is wire drawing
2nd stage is heat treatment
3rd stage is Insulating
Why cables are twisted
Because to reduce the electromagnetic interference from an external source
These cables will have two conductors of a single circuit which helps in reducing the interference.
Where to buy cables
These depend on the type of the requirement.
People buy both from online as well as in shops.
If you’re looking to but the small connecting wires you could go for online
Else I suggest you check in the shops.