> In the US, at one time there was a specification that required the average > over a (I think 24 hours) to be within three seconds. It always was when > I was growing up in the 60's and 70's. Now I've seen it get as much as 4 > seconds (once 5) out.
If anybody finds a good reference to official specifications, please let me know. Palo Alto has it's own power distribution system. Years ago, somebody told me that they (or a friend) had called the Palo Alto power dept trying to get info on how accurate the line frequency was. After he finally got through to the right person, the answer was "We are not tariffed for that." Here is PG&E's blurb describing what they provide: http://www.pge.com/tariffs/tm2/pdf/ELEC_RULES_2.pdf Page 7 says: 3. FREQUENCY PG&E will exercise reasonable diligence and care to regulate and maintain its frequency within reasonable limits but does not guarantee same. -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
