Why in a three pin plug the earth pin is thicker and longer
than the other pins?

Answer Posted / ranjith

The third pin is thicker than other pins so as to avoid the
lekage current to circulate in the circuit. As the
thickness is high so that the resistance path will be
reduced and the current can be conducted as the fault
current is 5 to 10 times larger than the cupply current

Is This Answer Correct ?    9 Yes 4 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Draw a block diagramof Three UPS systems connected in Parallel mode?

1659


Dear all: Recently we got a question about Interface between PMS and SAP-PM.once we got a update message from PMS.we should set the deletional flag for functional location in SAP system.Is there any FM or BAPI to use?There are only functional location create and change provided by SAP. Best regards!

1575


Is a contactor (or master relay) required between incoming lines and a VFD? The question goes to safety. If a contactor were used before the VFD and an e-stop engaged then the motor will coast to a stop (i.e. VFD loses power) instead of stopping much faster if the VFD braking fucntion were used. It would make more sense to keep power on the VFD.

1549


IN dc capacitive reactance is??

924


what are the different sizes of U.G. cable & where these cabl;es are used according to voltage ..

1652






If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?

4119


How to decide the size of the capacitor for a single phase induction motor say 2 HP ??

1638


When are the directional relays used?

603


Can I use distributon class/transmission class Lightning arresots for protecting the building? If not why please explain?

1415


Explain the working principle of Synchronous Generator and Assynchronous generator?

1726


What is the difference between the impedance percent and impedance voltage ?

1688


how we can set the IDMT relay.

1664


Why 15Amp. MCB is suitable to carry load of 1.5Ton Ac please Explain?

1635


What is step signal?

628


if the motor rated speed is 950rpm. how to change the above rated speed? is it possible?

994