Jim Lawrence
accessd at shaw.ca
Fri Aug 17 23:37:24 CDT 2007
Robert: You are right of course. It would be a one-time test I afraid.... I would hope no one would take such as comment seriously. It is like testing a leaky gas line with a match? (Whoops said it again...) ;-) Welcome to the Darwinian awards. If my concerns are not an issue I stand corrected... but the general perception continues Jim -----Original Message----- From: dba-tech-bounces at databaseadvisors.com [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Robert Sent: Friday, August 17, 2007 9:16 PM To: 'Discussion of Hardware and Software issues' Subject: Re: [dba-Tech] Wireless Problem Solved Jim, I spent 15 years in the Residential / Commercial HVAC/R service field, so I understand what you are trying to say, but thanks for your intelligent and thoughtful lesson nonetheless.. Your concern is simply not an issue here, and if it was long ago (Are there any published reports of such?), it is most certainly not now. Interference from power strips, UPS systems, induction motors... ect are MUCH bigger issues... It's SO much easier to detect and respond to polarity issues, then say frequency shifts, brown outs, or the other host of more complicated power line problems. That is one interesting test.. One should be careful about such foolish advice. WBR Robert -----Original Message----- From: dba-tech-bounces at databaseadvisors.com [mailto:dba-tech-bounces at databaseadvisors.com] On Behalf Of Jim Lawrence Sent: Friday, August 17, 2007 11:03 PM To: 'Discussion of Hardware and Software issues' Subject: Re: [dba-Tech] Wireless Problem Solved Hi Robert: Alternate current need 2 lines to work. If either line is disconnected the circuit is broken and power stopped. A potential problem exists when the circuit is hooked up wrong and instead of an appliance shutting off the hot line; it shuts off the neutral line. In this case if there is any problem within the appliance the circuit is live again. If you wish to test the theory, stick a fork in your toaster, while holding on to the tap, when it is off and if your hair stands on end the circuit is hooked up backwards. If not, your house wiring is correctly. If the devises can recognize this potential condition you are right there is no issue. If some amateur hooked up one circuit in the house backwards as soon as a device is inserted in bad plug and turned on, down goes the system. If you have something like a table saw in the basement, a place where many a home-owner and novice electrician learned their trade... I do not think the polarity recognition system was designed as an off and on switch. Jim