Answer Posted / guest

In order to be able to calculate the cable size of a power
cable one should know
1)how much load it has to carry.
2)how far or the distance
3)what is the voltage
4)what type of conductor to be used.
5)have the cable manufacturers catalogue
deciding on the type of conductor example aluminum or
copper, armoured ,surface mounted or under ground and
knowing the expected load the voltage drop is calculated and
the most suitable cable size is selected which falls within
the local regulations.
Same goes for the other cables also taking into
consideration all other factors.

why the carbon brushes are broken in srim while the motor runningtime

1759

---

I Just want do EHS Certified Certification Distance Course From Govt approved,so can any body provide me details.

2187

---

If a surge divertor is required to be protected by 32 amp C Curve Circuit breaker does this limit the amount of protection from surges that you will acheive

1837

---

Mention how NPN and PNP transistor works?

1358

---

At what speed 1 HP motor can run an electric car of weighing 400 kg?

1632

---

i am completed diploma in ece,and working in ht and lt lines.so is elligible diploma in ece for get electrical C Licence?plse give ur opinion?

1944

---

What is the meaning of dedicated earthing?

2255

---

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

2204

---

with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen

1887

---

There are a trformer and an induction machine. Those two have the same supply. For which device the load current will be maximum? And why?

1203

---

what are the protecyion of transformer & generators

2030

---

Define average demand?

1424

---

How DC earth leakage currents can be reduced ?

1969

---

What type of a DC motor would you use for a lift?

1124

---

What is difference between start imitation and start interlock for 3 phase motor protection ?

2308

---