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Old September 9th 04, 07:45 AM
Ian White, G3SEK
 
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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