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

What are the tests carried out on transformer while testing at sites?..Pls explain me in detail

2 Answers   Suzlon,

---

In Power cable specification what is U0/U and Um.

0 Answers  

---

difference between slippring induction motor and Generator?

1 Answers  

---

what is the reasons for blowing fuse

1 Answers  

---

I have an 15A fuse MCB that controls a night storage heater. It needs replacing and is now obsolete. Is a 16A C curve MCB the correct replacement?

2 Answers  

---

why any centrifugal blower draw more current in starting. consider id fan and fd fan?

0 Answers  

---

why do we use 25kv supply for traction purpose

1 Answers  

---

What should be the values of settling time, peak time, steady state error, overshoot, rise time, MPOS (Maximum percent over shoot) to keep the system in transient state, to keep the system in steady state ?

0 Answers  

---

What is core CT & it's function?

0 Answers  

---

What is the difference between Derived earth Fault and measured earth fault.How it works.

1 Answers  

---

why we use 25 kv in railway .not 11kv, or 33 kv

2 Answers   ISRO,

---

it is in our knowledge tht right plug of supply of residential suppy system is phase n other is neutral...howevr the battery charger of mobile works in both ways...i mean it is not restricted in only one direction.ny of the holder of charger can hav phase .so y is it not lik tht phase of supply must b connected 2 phase of charger...?

0 Answers   TATA,

---