street light wiring in photocell sensor

Helo sir.. im newbie in electrical.. can you explain what is the role of the contactor here in the circuit? Since it already has the photocell to control the on/off for the street light? And how do we determine which rate of ampere contactor was suitable to be used. Thank you

How to contactor Amphre

will you explain terminals of contactor here??

will u explain??? i think its wrong ...
Supply comes into MCB goes into contactor energize contactor and turn street lights on , what is SENSOR doing??? nothing

Thanks! So useful i copy.

Can you make a video where solar power collide with electrical

Thank you so much man
And good luck

Twenty seventh sir...👏🕊👍
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