Answer / chellappan

perfect zero value is not possible and near zero is
achievable in highly damp or watery surfaces

Answer / janakiramankesavan

should be maintain below 2 ohmes.

Answer / rajneesh babbar

if earth resistane value (0 ohm)not achived even all best
effort (using copper plate,best salution & charcoal
Ext.),joined more parallel earthings.

Answer / chellappan s

It is thoritical and cannot be achieved. Acceptable value is 1 ohms for medium voltages by practice.
Still lower value may be archived by several methods where sentive equipments are to be earthed. It will be costlier.

Answer / shafi

It is desined by earthing calculation and practical
proved ,practical reading is taken in oil & gas area

Answer / shafi

Yes, earthing rod should be inserted below 2meter summer
water level by drilling method

Answer / sudhakar

generally earth pits with coal & earth pipes

Answer / anand prasad yadav

depending on soil & best salution quiring in side the earth
pit.

Answer / rafiq

yes its possible to get earth resistance zero ohm
by using copper earthing (copper plate )

types of motors suitable for escalators with reason

2 Answers  

1)What is a Triode? What are its uses? 2) What is a Triac? 3) What is a Thyristor?

0 Answers   Bosch,

is the electrical energy photo copy possible or not???????????? give me some idea about that i m very great full tu u.

5 Answers  

in star connected 4wired transmission system ,what happen if the neutral is grounded . or not grounded. which is significant and y

2 Answers  

I want to merge a cable..in between two metering Cubicals which contains CT's and PT's and Energy meter..before taking merger..what are the common things required?

0 Answers  

What are the point of a single core cable to be earthed?

2 Answers   Alfanar, Jindal,

Hi ,what the accurate method to set correct(In) over load to protect the 3~ motor

4 Answers  

There are 2 Flip_Flop with logic between them. Given Clock to Q delay, logic prop. delay, set up and hold times specify maximum clock frequency of system. What happens if second output fed back to first input. Any changes? What happens with timing if second output is fed back to logic between the flops? Good Luck!

1 Answers   Qualcomm,

When testing an earthing connection, we use a 60 or 100 candle bulb with a phase connected direct from supply and the other wire to the new earthing provided.If the bulb glows then the earth is ok.Else earth connection is not Ok. So, why dont we can use all the home appliances taking a single wire from the phase and the return connection to Earth instead of return connection to neutral?

2 Answers  

Can earth resistance be measured without connecting the earth electrode? and should earthing connections be disconnected What is the effect of connecting two cables of different sizes in parallel with supply? Thanks in Advance. I am intrested to get in touch with some tecnocrats/engineers,my mail i.d is : hiremathvijay@rediffmail.com

1 Answers  

what is STUB protection in tranmission system and switch yard area?

9 Answers   KSEB, Power Grid,

Please let me if star point(Nutral) of Delta/ Strar transformer, in 4wire (TPN+E) is tobe gruonded seperatly,inaddition to LV Panel earthing????

1 Answers