A fuse provides "protection" and earth ground has nothing to do with its effectiveness. And your reference to " hundreds of thousands of joules" is an arbitrary figure.
Obvious is when one recites hearsay. For example, a fuse myth is promoted subjectively - without numbers. Those numbers: 1) Surges do damage in microseconds. Fuses take tens of milliseconds or longer to respond. Numbers make it obvious. A fuse does not do and does not claim to do such protection.
2) How does a millimeters gap in a fuse block what three miles of sky could not? It doesn’t. But again, the subjective and inaccurate speculation is exposed by numbers.
3) Fuses have a voltage number. For example 250 volt. If a surge voltage exceeds that number, then a blown fuse keeps conducting. One should learn these basic and well understood concepts BEFORE posting denials.
People who do this stuff use numbers such as hundreds of thousands of joules. If one knew otherwise, then an energy number is posted rather than make subjective denials. Subjective reasoning is how junk science gets promoted. One claims Furman does effective protection. But could not post even one Furman spec number that says so. Because Furman does not claim effective protection - except subjectively in sales brochures where lying is legal.
Facilities that cannot have damage properly earth all incoming wires. Some wires do not even have surge protectors. A hardwire connects low impedance (ie less than 10 feet) to single point earth ground.
Protectors are simply connecting devices to what does protection. Every protection layer is only defined by one ’energy absorbing’ item - its earth ground. Ineffective and grossly overpriced ’magic boxes’ (ie Furman) have no earth ground. And will not discuss it.
’Whole house’ protector is a ’secondary’ protection layer. Informed consumers should also inspect their ’primary’ protection layer. Over 100 years of science and experience are why ’whole house’ protection is routinely installed in every facility that cannot have damage. And why an item that needs most attention is the single point earth ground. Specification numbers say why including 50,000+ amps, microsecond transients, low impedance connection to a single point earth ground, and hundreds of thousands of joules. This superior solution also costs much less - about $1 per protected appliance. Even a Furman needs that protection. Made obvious when one attempts to post manufacturer specification numbers. None were posted because none exist.
That Eaton (Cutler Hammer) protector is an effective one. Other manufacturer are also known for integrity including Intermatic, Square D, Ditek, Siemens, Polyphaser (an industry benchmark), Syscom, Leviton, ABB, Delta, Erico, and General Electric. In every case, model numbers are irrelevant. Critical is its current rating (at least 50,000 amps) and that all so important hardwire for a low impedance (ie has no sharp bends) connection to single point earth ground. Electric companies also rent them. So easily installed that the girl who reads a meter may install it.
