Answer Posted / rd dadhich

Who so ever are thinking of low resistance as cause of
bigger hole means bigger earth pin are forgeting the point
that the same earth current on fault is flowing through the
Phase pin and connecting wires , whose area is very less
compared to earth hole or Pin , are also carrying that
fault current and are suitably rated accordingly .

The correct reason is :-
1. While inserting equipment first get earth
connection.as pin goes first and so equipment is
earthed before supply is given
2.While withdrawing the plug the earth connection
disconnects in last. Power disnnect first and
earth in last
Reason of earth Pin larger in diameter than other pins in a
plug socket :-
Accidently also one can not inser earth pin in other
pins .
Both the above features are for foolfroop safety & no other
reason like low restance etc

what happen if drive input fail momentry at 48.5 HZ frequency?

1977

---

Air circuit breaker safety

1506

---

when will be the iocl interview results ifaced the interview on september 8 th

2265

---

wat is meant by PX class in ct?

2097

---

Why we use Electrical energy rather than any other type of energy, mostly? Explain behavior of open secondary CT and short circuited secondary PT in energized condition?

1944

---

What is acsr cable and where we use it?

1205

---

What are the different losses In a de mac1une'! t.xplam

2819

---

tell me some type of questions throught which i can prepare for exam and do my best

2095

---

The synchronous machine excitation system explain

1878

---

1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

8410

---

how unidirectional torque is produced in DC motor?

6840

---

lenz law application and define

2914

---

What is meant by reactance voltage?

1202

---

hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

2068

---

How does an induction motor start?

1280

---