Past Papers

Useful Equations

V=IR
P=VI
P=I*IR
P=V*V/R

what are the conductor(ABC) sizes ?

Phase Conductor -- 70 mm2(cross section area).

NeutralConductor -- 54.6 mm2(cross section area).

Street Lampconductor -- 16 mm2(cross section area).

what are the constitute of ABC ?

Insulation Meterial
XLPE -Cross Link Poly Ethylene.

Phase Conductors - Hard Drawn Aluminium.
Neutral Conductors - Aluminium Alloy.
Street Lamp Conductor - Hard Drawn Aluminium.

what is Span and Sag of a Transmission Line ?

the Span and Sag as below image,





LT (Low Voltage) span = 40 ~ 45 m.
HT (High Voltage) Span = 70~75 m.

What are the types of ABC ?

1. 3 Phases and 1 Neutral.
2. 3 Phases, 1 Neutral & 1 Street Lamp Line.
3. 3 Phases , 1Neutral & 2 Street Lamp Lines.

What are the types of ABC ?