Golgappa.net | Golgappa.org | BagIndia.net | BodyIndia.Com | CabIndia.net | CarsBikes.net | CarsBikes.org | CashIndia.net | ConsumerIndia.net | CookingIndia.net | DataIndia.net | DealIndia.net | EmailIndia.net | FirstTablet.com | FirstTourist.com | ForsaleIndia.net | IndiaBody.Com | IndiaCab.net | IndiaCash.net | IndiaModel.net | KidForum.net | OfficeIndia.net | PaysIndia.com | RestaurantIndia.net | RestaurantsIndia.net | SaleForum.net | SellForum.net | SoldIndia.com | StarIndia.net | TomatoCab.com | TomatoCabs.com | TownIndia.com
Interested to Buy Any Domain ? << Click Here >> for more details...


why there is a fault occurs, if a phase wire touches ground..
and the fault not occurs when we connect a bulb between phase
and ground..??



why there is a fault occurs, if a phase wire touches ground.. and the fault not occurs when we con..

Answer / 7anoter4

Let's say the cable supplying the outlet [phase-neutral-
ground] is 3*14 awg copper and the length up to supply
panel is 300 ft. The conductor resistance is about 1 ohm[at
rated temperature].For 120 V voltage supply at panel if the
phase contact the grounding conductor the current will be
120/2=60 A. A 15A fuse will burn in less than 1 sec.
However, usually the short circuit current is 500-1000A.
If a bulb is connected between phase and ground ,for a 100
w bulb 120 V the resistance will be 120*120/100=144 ohm.
The current will be 120/144=0.83 A.

Is This Answer Correct ?    7 Yes 0 No

Post New Answer

More Electrical Engineering Interview Questions

Explain REF protection and sbef protection in transformer?

3 Answers  


what is the terminal voltage of dc series generator running at rated speed at no load?

2 Answers  


what is the difference b/w pvc cu conductor and cu breaded wire..?

1 Answers  


how much distance is required for earth pit to earth pit in substation???

3 Answers   Divis Laboratories,


what is the power factor of an inductive load ? (i) Zero (ii) Lagging (iii) Leading (iv) Unity

5 Answers  


Is it necessary to place tap changer in secondary winding or we can use on both sides?

3 Answers  


define transformer

1 Answers  


what is inverter and converter

7 Answers   Shrishti Power Technologies,


WHAT IS MEANT BY SHEATH VOLTAGE IN 132Kv cable?

0 Answers   L&T,


1)Why potential transformer primary site grounded? 2)can be loop between neutral & body for grounding? 3)What is the difference between ELCB &RCCB? 4)Why we use iron core in transformer insted of wooden core? 5)what is the principle of excitation? 6)Why we test the core balance test for transformer? 7)what is creepage?What is the creepage length for insulators at different voltages? 8)How much type of relays used for differential protection of generator,transformer & busbar protection?

5 Answers  


aeroline vibration is present

1 Answers   DVC,


what is per unit calculation?looking for simple and strong explanation thk u

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5086)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4456)
  • Electrical Engineering Interview Questions Electrical Engineering (16639)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)