Richard Clark wrote:
On Wed, 08 Sep 2004 21:24:53 GMT, "Jimmie"
wrote:
They are not interested in a specific value in most cases.
...
Ground meets spec or it doesnt.
Without a specific value, how do they (we) know it meets spec?
For a mains safety ground, the bottom line is: is the ground resistance
low enough to blow a fuse in the live rail? If the answer is no, you're
heading for a fire, so there is some surety in verifying that a fuse
really will blow.
On the other hand, for an RF ground it's a lousy test.
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek