Answer / mahavir jagdev

There are two answers to this question -

1. In olden times the earth plug was long and thick so that before any appliance get connected to the power, it it earthed and protects the person from shock as most of the equipments were made out of metal. It is thicker as the short circuit current is much more than the normal current the device takes.

2. With the modern three pin pligs the principle is the same but another safety feature has been added that the lower two power points open for insertion of the plug points only after the Earthing point has been insert. Again for safety.

Answer / k.prakashchandra

1.longer so that earth is connected first and disconnected
last.2.Thicker to bear heavy earth fault current 3. Both, so
that connections to phase ,neutral and earth are not
interchanged

Answer / rahul

earth fault more adverse with respect to phase fullt to
servive in heating effect earth fult hole for the earth
socket in an electrical plug outlet made
thicker and lenghty?

Answer / bhigesh

it for safty .otherwise its not strong its danger to
others.it can using passing to earth

Answer / tom hanks

Generally, to protect the socket from unwanted entries
(child finger or 2 plug entries without earth) all 3 holes
are closed from inside, to open it first earth Plug has to
insert with force which will open bottom holes too, thats
why Earth plugs are often lengthy and thicker.

bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

1 Answers  

Send the control circuit digram of a star delta stater?

1 Answers   L&T,

What is EHT tariff or Power factor Tariff ????

0 Answers   KSEB,

What is principle of Floroscent tube 36watt.

0 Answers   Diamiller, NDPL, Trident Hilton,

what is the difference between oil surge relay and buchholz relay.

0 Answers   MPPEB, Suparco,

What is the main application of DUMMY COIL in machines?

3 Answers   IES,

How to calculate the fuse rating depend upon the DC circuit?

0 Answers  

11/.433KV, 100KVA TRANSFORMER is supplied with .433KV AT ITS PRIMARY. HOW MUCH KVA IT CAN SUPPLY

8 Answers   ABB,

how to set time from star to delta starter

2 Answers  

what will happen if dc supply is given to ac motor?

9 Answers   CTS,

Why not instal the NGR in 11kv/433kv trasformer?

3 Answers  

how to check three phase motor torque value?

0 Answers   Apollo,