If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#76
|
|||
|
|||
Earthgrounding
Are you a licenced electrician? What do you know about your local or
national electrical code? John w_tom wrote: John John wrote: My house was built in 1977 and even then the power company would not have connected without earthing at the meter. In this country we have long ago abandoned knob and tube wiring... And that requirement is sufficient only for human safety. Power company cares not whether your appliances have any protection - or are even damaged every year. They are only concerned about earthing for human safety. Chances are your earthing is not sufficient for transistor safety. Did you read many posts and technical reasons for enhanced earthing? Most 1977 homes have earthing woefully insufficient for transistorized appliances AND have virtually no 'whole house' appliance protection. Does you telephone service have properly earthing protection - that was only introduced in the mid 1980s? Again, those many older telephone installations were only earthed for human safety - not for today's phones. Did you learn from previous posts to discover if your earthing is sufficient? Or did you just know and therefore post disparagement accordingly? Chances are that a house built in 1977 needs its earthing for all utilities upgraded. Chances are your earthing is the equivalent of knob and tube wiring. Did you read those posts or just *assume* 1977 earthing will always be sufficient? You have much learning to do. |
Ads |
#77
|
|||
|
|||
PLEASE DO NOT FEED THE TROLLS!
|
#78
|
|||
|
|||
Earthgrounding
Please don't feed the trolls.
|
#79
|
|||
|
|||
Earthgrounding
John John wrote:
Are you a licenced electrician? What do you know about your local or national electrical code? John - visit a library to read NEC. Unlike Pops, I do not post insults as if facts. Instead, provided are numbers, facts, concepts, and citations. In your case, start with Articles 250 and 800 of the National Electrical Code. Especially comprehend sections 250.52, 250.53, 800.30, 800.31, and 800.40. Also applicable are equivalent code requirements in Articles 810 and 820. Those are basic (starting) requirements. Then ask yourself why this reply is without Rush Limbaugh insults; includes specific code citations. How do I know this? Appreciate that electricians learn what code requires. Others learn more such as why code demands those requirements and what enhancements are required beyond code. That previous citation from an industry professional demonstrates concepts beyond what code demands: http://www.erico.com/public/library/...es/tncr002.pdf Another industry benchmark is: http://www.polyphaser.com/ppc_ptd_home.aspx Even British Standard BS6651 discusses these concepts. Another inspection: http://www.tvtower.com/fpl.html 1977 residential earthing is typically insufficient. Maybe Pops will explain why those requirements. Safest bet is that Pop, like so many who post as he has, cannot even cite or quote a relevant NEC article. Orange County FL has significant transistor threats. Orange County emergency response system required better protection. Just like your telco switching center (CO), instead, the center needs effective protection. Protection system was upgraded. Did they install plug-in protectors? Of course not. They needed effective solutions: enhanced building earthing - the essential single point earth ground. Those in this newsgroup promoting for plug-in protector manufacturers hope you don't learn this: http://www.psihq.com/AllCopper.htm Every incoming wire, be it from an antenna or utility wires above or beneath street - each wire is a direct and potentially destructive connection into appliances. Every wire in every cable must connect short to same earthing electrode. Again, this is old and well proven technology that plug-in protector promoters here hope you never learn. Electricians know what is required for human safety. Transistor protection system only starts by meeting post 1990 code. Your home is only 1977 earthing? Then an inspection is necessary. That earthing may need be enhanced from human safety to include transistor safety. Enhancements usually cost little money. A 'whole house' protector (as sold in electrical supply houses, Lowes, or Home Depot) is recommended. Little money. Significant protection. Appreciate why an earthing wire also need be short as possible - 'less than 10 feet'. Nothing is new here. Pre-1930 technology was made necessary by transistors. Same protection even is required for a DSL modem. |
#80
|
|||
|
|||
PLEASE DO NOT FEED THE TROLLS!
"Pop`" wrote in message
... NOTHING And your question is? |
#81
|
|||
|
|||
PLEASE DO NOT FEED THE TROLLS!
PLEASE DO NOT FEED THE TROLLS!
|
Thread Tools | |
Display Modes | |
|
|