High end UPS for Expensive audio eequipments

>  Also, the length of the connection to the ground rod is not usually the determining factor of the safety ground's impedance - that's established by soil conditions. 

You have confused resistance with impedance.  Wire length, sharp bends, metallic conduit, etc can significantly increase impedance and not change resistance.

From Jensen Transformers' "Understanding, Finding, & Eliminating Ground Loops in Audio & Videa Systems":
> An EARTH ground is one actually connected to the earth and is necessary for LIGHTNING protection.

From Mike Holts  "Grounding vs Bonding":
>An effective, low-impedance ground path is critical for the successful operation of an SPD. ... Therefore, an evaluation of the service entrance grounding system at the time of the SPD installation is very important.

From Dr Standler's book "Protection of Electronic Circuits from Overvoltage":
> It is essential that every arrester be connected to ground, because the charge in a lightning strike flows to ground. However, providing a low-impedance connection to ground is one of the most difficult practical problems in installing a surge arrester.

From George Kauffman in Electrical Engineering Times:
> Another aspect of impedance ... of a wire is predominately related to
> its length and weakly related to its diameter. ... The length of the
> cable increases the impedance dramatically.

From CRITEC's Technical Note TNCR019:
> The rule of thumb is each foot of wiring adds an additional 50-200V of let-through voltage.

Mike Holt even defines voltages for a tiny 500 amp surge on a 14 AWG wire:
> 6 inches  460 V; 20 inches 582 V; 30 inches 782 V. ...

You can do the math.  That is not resistance.  That is impedance.

Denials come only from hearsay; not from basic electrical knowledge and not from informed professionals. Power outage does not damage hardware. Adjacent protectors do not provide effective protection.  Effective protection always means a potentially destructive transient is not inside a building.  Then robust protection inside all equipment is not overwhelmed.

600V is what I would consider an over-voltage, not a surge. A surge can be kilovolts, though in some cases very low current potential. However that is all it takes to fry silicon. These same circuits that you are touting as being good surge protection is absent in most power supplies (with the exception of PCs).  I would also need to research this as I believe this may apply to electric / motor driven appliances as opposed to electronics. In any event, there's usually a time limit for exposure.

SMP devices will clamp well below that, around 200-300V I believe, but that's besides the point.

Um, your comments about series mode protection are in contradiction with the UL surge protection ratings, and your insistence on relying on Joule ratings means you don’t understand the physics involved. No current = no joules. The same for your ridiculous claims of undersized MOV’s. I’m kind of done with discussing this with you, since you seem to be unwilling to do your homework and are using a dual standard. Of course manufacturers will hype their product, whether they make series or traditional surge protectors.

Have a nice day.

Erik

westom09-14-2016 1:40pm You have confused resistance with impedance.

No, I'm not confused at all. But like @Eric_Squires, I'm done arguing with you and your notions of a "single ground point" through a grounding rod and other misinformed - and potentially lethally dangerous - "theories."

cleeds has not even asked what 'single point earth ground' means.  And somehow is an expert?  Single point earth ground must both meet and exceed code requirements.  As was clearly obvious.  He could change tact and start learning what these expressions really mean.  But he won't.  Some people get attached to what advertising has told them.  And then are incapable of learning science; learning how easy advertising brainwashes.

Single point earth ground is standard in every facility that does not have damage. Even implemented in the earliest days of telephones so that operators worked without harm through every thunderstorm. 

cleeds is an example of one entrenched by propaganda.  Unable to learn simple science concepts that even Ben Franklin demonstrated in 1752.  A classic naysayer who knows only he is right.  He cannot even post one manufacturer specification number.

Plenty more to learn. Blackouts and brownouts do not damage hardware.  Most anomalies are already made irrelevant by what is inside electronics.  Anomalies that can overwhelm existing protection are rare.  So informed consumers spend $1 per protected appliance on protection that is far superior to any 'magic' plug-in' box.  Since strip protectors can even compromise superior protection inside appliances if not used in conjunction with a proven and properly earthed 'whole house' solution.

A simple rule applies.  Protection is always about where hundreds of thousands of joules harmlessly dissipate.  A protector is only as effective as its earth ground.

>  Um, your comments about series mode protection are in contradiction with the UL surge protection ratings, and your insistence on relying on Joule ratings means you don’t understand the physics involved. No current = no joules. The same for your ridiculous claims of undersized MOV’s. 

Again UL says nothing about hardware protection.  Anyone with basic electrical knowledge knows that.  UL is only concerned with human safety.  A protector can be near zero protection, not protect anything, fail catastrophically, and still be UL listed.  Because it did not spit sparks and flames.  UL says nothing about protection.  If I say it again, will you finally grasp it?  UL says nothing about hardware protection.  If you cannot get past that, then I must conclude you are incapable of learning even simplest stuff. 

UL1449 is about human safety.  Unfortunately some near zero joule protectors still create house fires. To meet the latest UL1449 upgrade, many protector manufacturers had to increase their joules.  A recent example were some 15 million APC protectors. Why ignore examples of near zero protectors that even create house fires.  Do you need another 50 examples to finally admit advertising lies?

Series mode protectors will 'absorb' up to 600 joules.  If not, a denial would quote a spec number.  No numbers quoted because the denial is an emotion; not based in facts or numbers.  Series mode filters protect from surges that typically cause no damage.

600 volts is protection standard in electronics before PCs existed.  Appliances today are even more robust.  Since you deny specifications (because you don't like it), well, this quote is from Dr Standler's 1992 IEEE paper:  :
> This paper is apparently the first publication in the peer-reviewed, archival engineering literature that specifically discusses the ability of unprotected electronic equipment to survive surges in a laboratory. Surprisingly, consumer electronic equipment was able to survive surges with peak voltages of 2000 V,

600 volts.  1800 volts. Those were specification numbers.  Standler found 2000 volts is a more realistic number.  Why remain entrenched on 600 volts - a number from 40 years ago? Apparently only to argue..

Protection is not about a voltage.  High voltage only exists when someone foolishly tried to 'block' or 'absorb' a surge.  Protection of expensive equipment is never provided by urban myths - 'magic boxes'.  Effective 'whole house' protector never foolishly tries to 'block' a surge - therefore create a high voltage.  Instead, near zero voltages exist when effective protection connects a current (not a voltage) low impedance to earth.   At what point should we mention it is science proven over 100 years ago.

Facilities that cannot have damage always use a 'whole house' solution.   That is, beyond doubt, OP's best recommendation.  It even comes with numbers that say so.

Impedance - not resistance.  Naysayers do not even know what impedance is.  Do not even know what single point earth ground is.  And then make bogus accusations because they did not know it;  They still do not know what single point earth ground is.  Do not have a clue what is or is not dangerous.  Apparently near zero protectors creating fires is not dangerous - their reasoning.

Best protection for the OP is a 'whole house' solution from other companies known by any guy for integrity.  Furman and APC are not on that list.  A protector is only as effective as its earth ground - including that low impedance (ie less than 10 foot) connection. Reality has not changed because near zero joules manufacturers said so.  A protector is only as effective as its earth ground - item that does the protection.