Answer Posted / engineered

Factors for selection of cable
1.Rated current
2.voltage drop across cable
3.derating factor based on temprature,no. of cables laid
through same path influencing each other
4. Type of laying method:- like air, ground, duct, tray,
raceway
5. type of conductor required.
6. type of insulation, like PVC, XLPE, FRLS based on site
condition

how do prepare ongc exam.how is it question model.i am electrical. which part covering in electrical.tell me

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What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

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I am shobana from Chennai. I am having my personal interview on 19th Dec at Chennai.kindly mail me the questions to mail id shobana.shanthi@gmail.com

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The electrical energy required to raise the tempreture of a given amount water is 200 kwh. If the heat losses are 20%, the energy required is?

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