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As per I.E. rules the insulation resistance between conductor and earth should not be less than
  • a)
    100 Mega-ohm/no. of outlets
  • b)
    80 Mega-ohms/no. of outlets
  • c)
    50 Mega-ohms/no. of outlets
  • d)
    30 Mega-ohms/no. of outlets
Correct answer is option 'C'. Can you explain this answer?
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As per I.E. rules the insulation resistance between conductor and eart...
As per IE rules, insulation Resistance between earth and conductor should not exceed the 1/5000 time of the current flowing through the conductor.
That is to be measured by the ‘Megger’ instrument.
As per IE rules, 1956 insulation Resistance between earth and conductor should in range of mega Ohms.
IMPORTANT TO REMEMBER:-
One Mega ohm Rule for IR Value for Equipment
Based upon equipment rating:
< 1K V = 1 MΩ minimum
>1KV = 1 MΩ /1KV
Therefore, based on this analogy for Medium and High voltages there is need for Insulation –
Therefore,
Value of insulation Resistance between earth and conductor should not be less than 100 M ohm.
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As per I.E. rules the insulation resistance between conductor and eart...
Insulation Resistance as per I.E. Rules

Insulation resistance is the resistance offered by the insulation material between two conductors or between a conductor and earth. It is an important parameter to ensure the safety and reliability of electrical installations.

According to the Indian Electricity Rules (I.E. rules), the insulation resistance between conductor and earth should not be less than:

- 50 Mega-ohms per outlet for low voltage installations (up to 1000V)
- 100 Mega-ohms per outlet for high voltage installations (above 1000V)

This means that for a given number of outlets in an installation, the total insulation resistance between all the conductors and earth should be:

- At least 50 Mega-ohms multiplied by the number of outlets for low voltage installations
- At least 100 Mega-ohms multiplied by the number of outlets for high voltage installations

For example, if an installation has 10 outlets and operates at low voltage, the total insulation resistance between all the conductors and earth should be at least 500 Mega-ohms.

Importance of Insulation Resistance

Insulation resistance is important for several reasons:

- It ensures the safety of personnel and equipment by preventing electrical shocks, short circuits, and ground faults.
- It helps to detect and locate insulation faults, such as damaged cables or poor connections, before they cause serious problems.
- It is a requirement for compliance with electrical safety standards and regulations.

Measurement of Insulation Resistance

Insulation resistance is measured using a megohmmeter, also known as an insulation tester. This instrument applies a high voltage to the insulation and measures the resulting current flow. The insulation resistance is then calculated using Ohm's law.

It is important to note that the insulation resistance may vary over time due to environmental factors, such as humidity, temperature, and contamination. Therefore, it is recommended to perform periodic insulation resistance tests to ensure that the installation remains safe and reliable.
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it depends on the length of the conductor the capacitance of the line is proportional to the length of the transmission line their effect is negligible on the performance of short having a length less than 80 km and low voltage transmission accidents of the transmission line along with the conductances forms the shunted mittens the conductance and the transmission line is because of the leakage over the surface of the conductor considered a line consisting of two conductors and be each of radius are the distance between the conductors being Des shown in the diagram below minus the potential difference between the conductors and via's work QA charge on conductor QB charge on conductor vvab pencil difference between conductor and the Epsilon minus absolute primitivity QA plus QV = 0 so that QA equals QB - equals DBA equals data equals DB equals our substituting these values and voltage equation we get the capacitance between the conductors is cab is referred to as lying to line capacitance if the two conductors are in VR oppositely charge then the potential difference between them is zero then the potential of each conductor is given by one half bath the capacitance between each conductor and point of zero potential and is capacitive CN is called the capacitance to neut or capacitance to ground capacitance cab is the combination of two equal capacity and VN series thus capacitance to neutral is twice the capacitance between the conductors IE CN equals to Cave the absolute primitivity Epsilon is given by Epsilon equals epsilono Epsilon are where epsilano is the permittivity of the free space and Epsilon or is the relative primitivity of the medium prayer capacitance reactants between one conductor and neutral capacitance of the symmetrical three phase line let a balanced system of voltage be applied to a symmetrical three-phase line shown below the phasor diagram of the three phase line with equilateral spacing is shown below take the voltage of conductor to neutral as a reference phaser the potential difference between conductor and we can be written the similarly potential difference between conductors and sea is on adding equations one and two we get also combining equation three and four from equation 6 and 7 the line to neutral capacitance the capacitance of symmetrical three phase line is same as that of the two wire line Related: Capacitance of Transmission Lines?

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As per I.E. rules the insulation resistance between conductor and earth should not be less thana)100 Mega-ohm/no. of outletsb)80 Mega-ohms/no. of outletsc)50 Mega-ohms/no. of outletsd)30 Mega-ohms/no. of outletsCorrect answer is option 'C'. Can you explain this answer?
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