Originally Posted by oppopioneer
westom, according to Eaton, 80% of transients and surge generated damages are generated inside the facility.
The video does what I believe any company should do in retail propaganda. Hype myths that are subjective. Have no numbers. Then those educated in things useless will enrich them.
So let's put some numbers to those claims. Most all those transients are noise. So trivial that some of the most sensitive appliances - bathroom and kitchen GFCIs, dimmer switches, etc) are not damaged. Most transients are maybe ten volts. Noise heard in lesser quality stereo and video equipment.
If anything inside a house is creating destructive surges, then what suffers most and is damaged first? First, an appliance that creates a destructive transient is closest to and is the first thing damaged. Second, a protector must be installed on that appliance. Not on other appliances that might suffer. Third, any appliance that is creating such transients (ie refrigerator, copy machine, etc) will destroy or degrade a plug-in protector quickly. Those transients will quickly exceed 10,000. So buy new protectors monthly or quarterly. Fourth, any appliance that creates destructive transients should be binned quickly as an obviously defective appliance.
And fifth, all appliances contain serious surge protection. An industry design standard 40 years ago required electronics to withstand up to 600 volts without damage. Newer standards are at thousands of volts - even for low voltage signal wires. For example, what is the rating for Ethernet? About 2000 volts.
How often are you replacing dimmer switches and digital clocks every week? Why do appliances, constantly outputting these surges, not have you replacing smoke detectors daily? Because those transients are only noise. Well below destructive levels.
So what are destructive voltages? These typically occur once every seven years. A numbers that can vary even within the same town. Further variance is defined by conditions such as local geology. Perform a neighborhood survey to better learn what others have suffered over the past ten years. Or simply install what all home should have anyway to make typically destructive surges (and internal generated surges) irrelevant. One 'whole house' protector.
Well Eaton cited the Emerald book. And then we add numbers they forgot to include. From the Green Book entitled 'Static and Lightning Protection Grounding':
> Lightning cannot be prevented; it can only be intercepted or diverted to a path which
> will, if well designed and constructed, not result in damage. Even this means is not
> positive, providing only 99.5-99.9% protection. ...
> Still, a 99.5% protection level will reduce the incidence of direct strokes from one
> stroke per 30 years ... to one stroke per 6000 years ...
An earthed protector does only 99.5% of the protection. At a cost of about $1 per protected appliance. Then we spend tens or 100 times more money per appliance for plug-in protectors to do what - another 0.2% protection? Well yes, I say more protectors are better since I am the 1% of America who owned most of the money. But the common man does not spend money like it was tap water. An informed consumer has more than sufficient protection with one 'whole house' protector (properly earthed) to make 99.5% of transients irrelevant.
That Eaton video also noted what interior protectors are for. Voltages defined by the 'whole house' protector's "let-through voltage". What is the number for that voltage? 400 volts. Well below the 600 volt limit defined by appliances.
What would that plug-in protector do? See its let-through voltage number. 400 volts lowered to 330 volts (only if those 400 volts is one type of surge). Where is the massive ternary protection? Voltage remains almost as high for something that costs how many tens of times more money?
Why do reliable facilities want their protectors up to 50 meters distant from the protector? Those 400 volts are so much lower when separation increases between protector and appliance. What is a non-destructive voltage is further decreased by a protector that is distant from electronics. Again, wire impedance.
In my travels, I did find one appliance that could actually create a serious surge. A car battery charger from the 1960s. If it was turned off when connected to a battery, when the battery was badly discharged, and if doing a fast charge, then it would trip some circuits I built and install to monitor for destructive surges. Over decades, I found only one appliance that could generate anything more than noise.
Yes, all appliances generate transients. And then we do what is always required to not have junk science. Include numbers. What does advertising routinely do to promote scams? What was Dannon Yogurt doing to promote a scam; miracle foods that even cure colds and flu. Easy when subjective claims come with no facts and no numbers. Their lie created a massive sales increase. Because so many people only believe what they are told. And routinely forget to demand the numbers.
Essential to protection of everything - including those plug-in protectors so easy destroyed by surges - is one properly earthed 'whole house' protector. Because earth ground does protection from typically destructive surges. And because even direct lightning strikes must never cause appliance damage.
And finally, which appliance must be most protected during a surge? The smoke detector. Just another reason why informed or educated homeowners always earth one 'whole house' protector.