Number of Earthing Electrode and Earthing Resistance depends on the resistivity of soil and time for fault current to pass through (1 sec or 3 sec). If we divide the area for earthing required by the area of one earth plate gives the number of earth pits required.
There is no general rule to calculate the exact number of earth pits and size of earthing strip, but discharging of leakage currentis certainly dependent on the cross section area of the material so for any equipment the earth strip size is calculated on the current to be carried by that strip.
First the leakage current to be carried is calculated and then size of the strip is determined.
For most of the electrical equipment like transformer, diesel generator set etc., the general concept is to have 4 number of earth pits. 2 no’s for body earthing with 2 separate strips with the pits shorted and 2 nos for Neutral with 2 separate strips with ….Read Full Article
Solar Flux Rises as Coronal Holes Bring Aurora | Solar Storm Forecast 03.14.21 Read more
The response to ARRL’s call to action urging the support of US Senators for the Amateur Radio Parity Act, H.R. 1301, has been gratifying — although th... Read more
Professional VHF UHF Radio: Dual band, dual watch, dual standby, up to 128 channels. Equipped with an 8.9-inch long antenna, this solid 5W radio can r... Read more
The Amateur Radio Parity Act was introduced in the US Senate on July 12, marking another step forward for this landmark legislation. Senators Roger Wi... Read more
A growing number of campus radio clubs and student radio amateurs have begun to share ideas and suggestions on the ARRL Collegiate Amateur Radio Initi... Read more
An interesting article in the media claims a woman’s insulin pump is being “potentially” interfered with by an amateur radio operato... Read more
2017 Digital Replica Edition The VHF/UHF DX Book was written in the early to mid-1990s by a team of experienced VHF/UHF DXers and equipment developers... Read more
Warning: file_get_contents(https://plusone.google.com/_/+1/fastbutton?url=https%3A%2F%2Fqrznow.com%2Fhow-to-determine-correct-number-of-earthing-electrodes-strips-plates-and-pipes%2F): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in /home/qrznow/public_html/wp-content/themes/goodnews5/framework/functions/posts_share.php on line 151