![](https://www.itu.int/dms_pub/itu-t/opb/hdb/T-HDB-EMC.2-1976-JPG-E.jpg) | A great deal of research has been done on earthing problems in connection with telecommunications and several technical papers have been published as a result. Although opinions and practices differ, there is also a large measure of unanimity on certain aspects. This first edition of a handbook on earthing is an attempt to set out those principles on which a measure of agreement has been reached, and, in those cases where there are different possibilities, to compare their merits.
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