1.

Explain the types of cables and there constructions.

Answer»

THERE ARE SOME TYPE OF CABLES-

Shielded - 

(A) Twisted Pair 

(B) Multicore

These cables are individually shielded, twisted pairs, used where the effects of crosstalk between cables must be minimized.

Overall- data cables such as printer and control.

Co-Axial - Co-ail cable is constructed of an outer insulated sheath with a shield of braided copper and in other cases is supplemented with a foil shield, over an insulator and a single core conductor that is concentric to the whole cable. Used where high bandwidth is required 

E.G Video , Digital signals

Composite Multi core - A combination of shielded twisted pair and co-axial cables used particularly for large video cameras.

A combination of shielded twisted pair and unshielded cables used for valve microphones.

Power Leads - Color coding

Australia follows the UK and European code of

Brown- Active

Blue - Neutral 

Green/Yellow- Earth



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