What is the recommended value of earth resistance as IE rules?
The NFPA and IEEE recommend a ground resistance value of 5 ohms or less while the NEC has stated to “Make sure that system impedance to ground is less than 5 ohms specified in NEC 50.56. In facilities with sensitive equipment it should be 5ohms or less.”
What is IE Rule 40?
Section 40 in The Indian Electricity Rules, 1956. (1) Street boxes shall not contain gas pipes, and precautions shall be taken to prevent, as far as reasonably possible, any influx of water or gas.
How many ohms is a bad ground?
Ideally a ground should be of zero ohms resistance. There is not one standard ground resistance threshold that is recognized by all agencies. However, the NFPA and IEEE have recommended a ground resistance value of 5.0 ohms or less.
Which ie rule is used for connection with earth?
Rule 90 is about earthing and states that all metal supports and metallic fittings should be permanently and efficiently earthed.
What is IE Rule 1956?
What are the General safety requirements under Indian Electricity Rules, 1956? All supply lines and apparatus to be of sufficient power ratings and to be insulated properly to ensure safety of humans and animals. Instructions for restoration of persons suffering from electric shock to be placed in conspicuous places.
Which ie rule is related to earthing?
What is good earthing voltage?
A rule-of-thumb used by many in the industry is that neutral to ground voltage of 2V or less at the receptacle is okay, while a few volts or more indicates overloading, and 5V is seen as the upper limit.
What is the good earthing value?
What is the IE Rule 61?
(f) No person shall make connection with earth by the aid of, nor shall he keep it in contact with, any water main not belonging to him except with the consent of the owner thereof and of the Inspector.
What are the IE rules?
IE Rules
- Appointment of inspectors & their duties.
- Licensing provisions.
- General safety requirements.
- Conditions relating to supply and use of energy.
- Electric supply lines and systems for LV & MV.
- Electric supply lines and systems for HV & EHV.
- Overhead lines, underground cables and generating stations.
What are IE rules?
The Central Electricity Board had made IE rules in exercise of the powers conferred by section 37 of the Indian Electricity Act, 1910 (9 of 1910) for regulating the generation transmission supply and use of electrical energy and generally to carry out the purposes and Objects of the said act .
What is the importance of IE rules?
All electric supply lines and apparatus shall be of sufficient rating and mechanical strength and shall be installed and maintained in such a manner to ensure safety. The relevant code of practice of IS i/c National Electrical Code, if any, may be followed, in so far as there is no inconsistency with these rules.
Is there a maximum permissible earthing resistance in IE?
Even though the IE Rules do not specify a maximum permissible Earth Resistance Value, the Indian National Electric Code, 1985, does specify a maximum permissible value for equipment earthing – it says that the equipment earthing resistance should be less than 5 Ohms.
What do you need to know about equipment Earthing?
What is Earthing? Equipment earthing is a connection done through a metal link between the body of any electrical appliance, or neutral point, as the case may be, to the deeper ground soil. The metal link is normally of MS flat, CI flat, GI wire which should be penetrated to the ground earth grid.
What kind of wire should be used for earthing?
The metal link is normally of MS flat, CI flat, GI wire which should be penetrated to the ground earth grid. Equipment earthing is based on IS:3043-1987 Standards. Classification of electrical equipment IS: 9409-1980 Important rules for safety and earthing practice is based on IE rules 1956
What is the Code of practice for earthing?
IS 3043 (1987): Code of practice for earthing Disclosure to Promote the Right To Information