Answer / ramesh

the lighting load is decided not just by the size of the
room but by considering various other factors like the
illumination level requiredin the room, which can theb
converted into electrical power by back working the number
of lamp and the lumens per watt of that chosen type of lamp.

As regarding power load, what i understand is it consists
of airc-conditioning. The thumb rule is 1.5 tonnes of air-
conditioning is required for a room of size say 10 ft x 10
ft x 10 ft. Normally 1.0 tonne ac plant will consume about
2.0 kw max. A 165 litre capacity domestic refrigretaor may
consume about 0.2 kw

For the other power loads like gadgtes (may be xerox
machine at office, computers, printers etc.,) we have to
sum up the actual name plate ratings.

Answer / ayyappan

lighting load is nothing but a load without motor principle,except fan.at the same time power load is the load all motor and induction load..eg:pump motor, grinder,washingmachine, ac etc
for area we calculate the lighting load by illumination in candela.it also depens glare ,beam angle.
for power load its depends on the no of phase,for area means its like machine occupied by the area.

Answer / rm

You can calculate based on lighting load density factor.. which depends on the type of occupancy.... let's say 15w/m2 500m2 Then calculate 500x15 = 7500w.each lighting point will b assumed to have 100w/unit. So 7500/100= 75 lighting points

How to decide no. of Step and Kvar for APFC Panel 40 kvar MD: 33.12 KVA Avg pf : 0.8540

0 Answers  

---

The earth pin of some three pin plugs are seen split. why?

1 Answers  

---

Actually why the transformers are rated in KVA.?

4 Answers   BSL, Engineering,

---

How CFL &T5 tube light glows?

0 Answers   HAL,

---

How can we design a HVAC Plant room which includes AHU,FCU,Chillers,Cooling towers, Pumps etc & how will they work? any Drawing if possible?

0 Answers   TCS,

---

I have cleared IOCL written exam(Electrical). My intv is on 6/9/2008.can anyone guide me & tellme abt intv questions.

5 Answers   IOCL,

---

What is application/Function of Electro chlorinator in Offshore Oil & gas Platform ?

1 Answers  

---

Advantage of 11KV ring main system with open point

1 Answers   Alam Group of Companies,

---

Why the cores of large transformers build up of circular cross section?

0 Answers  

---

1. Why is the speed of shunt motor practically constant? 2. Why dc series motor use to start with heavy loads? 3. advantages & disadvantages of separately excited generator over self excited generator?

0 Answers  

---

What is the output voltage of a DG set.

3 Answers   Fitness First,

---

what is difference between DC and Ac

5 Answers   Birla,

---