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Generally lower earth resistance is preferable but for certain applications following earth resistance are satisfactory
Large Power Station s– 0.5 Ohm
Major Power Stations - 1.0 Ohm
Small Substation – 2.0 Ohm
In all Other Cases – 8.0 Ohm
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoA; There is no rules for ohmic Resistance except the lowest the better. A MILLION AMPS from lighting can raise a building potential quite a bit.
Wiki User
∙ 13y agoA; That realy depends on the current that can be expected to flow. Generally speaking the lower the better.
Wiki User
∙ 11y agonobody knows. i try to look it up but no website or anything tells my the answer
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What does 14.65 ohms equal on the 20k setting. I got no reading on the lower settings?
The reading of 14.65 on the 20k setting means 14.65K Ohms, and you probably need to go back and re-read the instructions for the meter. If, for instance, you used a 2M scale, if you had one, you would get 0.014, but the result would not be very accurate, as you need to pick a range that is close to maximum reading for that range. It is normal procedure to start with a high range and come down in range as you approach an on scale reading.
What is the maximum value of a 220 ohm with a 10 percent tolerance?
242 ohms INCLUDES initial tolerance assuming no thermal drift aging etc
What is the purpose of 50 ohms antenna?
A; it is to match the cable line impedance to the receiver for maximum transfer of energy
What is the difference between Ohms and Ohms CT in impedance of an audio transformer?
The difference in between Ohms and Ohms CT is that in Ohms CT it has CT at the end.
Megger value for single conductor?
It depends on the value of voltage being applied to the wire in normal use. Voltages up to 750 volts can be used on wires reading as low as .5 meg ohms. Engineers like to see 5 meg ohms on conductor readings.
What is the acceptable value of grounding resistance for any application?
An acceptable resistance for a ground to ground plate system is 2 ohms with a maximum allowance to 5 ohms. If the measured resistance is above 5 ohms more grounding rods or plates have to be added to reduce the resistance down to the acceptable levels.
When grounding a metal box what must be done?
The grounding system of a distribution must be from zero ohms to a maximum of two ohms. This is usually obtained by bonding all metallic parts back to the distribution centre with a wire capable of handling the circuits fault current if the circuit should ground out. The ground wire in cable sets is used for this purpose.
What is the max ohms when doing the annual test on grounding reel?
Less than >25 olms.
What is the ohms reading for the oil level sensor on a Briggs and stratton engine?
5 ohms
If a digital meter face shows 0.93 when set to k ohms the reading means what?
.93k ohms
What does 14.65 ohms equal on the 20k setting. I got no reading on the lower settings?
The reading of 14.65 on the 20k setting means 14.65K Ohms, and you probably need to go back and re-read the instructions for the meter. If, for instance, you used a 2M scale, if you had one, you would get 0.014, but the result would not be very accurate, as you need to pick a range that is close to maximum reading for that range. It is normal procedure to start with a high range and come down in range as you approach an on scale reading.
Why does your grounding meter read OL from gen to 1st ground rod and from 1st to 2nd ground rod get 28.51 ohms?
Code requires that the resistance between the two grounding electrodes be 25 ohms or less. You don't mention how deep they are or how far apart they are. THat will make a difference. Or it could be the soil they are in.You need to get the resistance down
What is the maximum value of a 220 ohm with a 10 percent tolerance?
242 ohms INCLUDES initial tolerance assuming no thermal drift aging etc
What is the purpose of 50 ohms antenna?
A; it is to match the cable line impedance to the receiver for maximum transfer of energy
What is the proper ohm reading for 2000 dodge neon spark plug wire?
10,000 ohms per foot.
Is a reading of 0.690 the same as close to 700 ohms the decimal point is confusing me.?
No, it is not the same. It is nearly 0.700 units.
What value will appear on ohmmeter when we will check 100 uh microhenry inductor?
The reading will be very close to zero ohms.
