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First understand why a pump is damaged. Lightning is an electrical connection from a cloud (maybe three miles up) to earthborne charges (maybe four miles distant). Lightning does not go five miles across the sky to connect to those charges. It takes an electrically shorter path 3 miles down...

The point of interconnecting electrodes is to create equipotential. Accomplished by interconnecting wires that are buried. Then safety code says how deep and how much thicker that wire must be. Two key terms apply to earthing that must also exceed safety code requirments. Equipotential...

That rod (electrode) must first meet human safety requirements. At minimum, it must be at least 8 feet deep. Usually, electricians install multiple rods rather than buy a machine to measure ground resistance. Only to meet human safety requirements. You are using the same earth ground to...

That prong is a safety ground. Surge protection is about something completely different - earth ground. That protector must make a connection to earth that is as short as possible. A connection that has no sharp bends and is not even inside metallic conduit. Assuming a camera is separate...

A failed $20 protector means it did no protection. An appliance protected itself while the protector disconnected as fast as possible from the surge. Left the surge connected to the appliance. If disconnecting too slow, then a grossly undersized protector may create a house fire. Have your...

If internally generated surges were destructive, then we are replacing dimmer switches, GFCIs, and digital clocks daily. Due to superior protection already existing in all appliances, those internally generated surges are routinely irrelevant. That protection was defined even by international...

Protection already inside a computer is typically superior to anything inside a power strip. A tiny surge, too small to overwhelm protection inside every computer, can destroy a grossly undersized power strip. The naive will then credit that grossly undersized power strip. Recommend that...

Lightning is an electrical connection from the cloud to earthborne charges maybe five miles away. An electrically shortest path is maybe three miles down to earth. And four mile through earth. Damage occurs when a building becomes part of that path. Earth a lightning rod to protect the...

Technicians are only taught what they need to know to do the work. An electrician, for example, would not know anything about wire impedance because his job is mostly about installing wires safely. He understands concepts defined by wire resistance. Code is only about human safety. An...

Because it is called a protector means it does something useful? Defined was what does the protection: “ low impedance (ie 'less than 10 feet') to single point ground. “ How does that receptacle make a low impedance connection to what does protection? It doesn't. Protection...

Codes define human safety; not transistor safety. A protector is about protecting appliances - not humans. Appreciate what does protection. Not any protector. Protection means hundreds of thousands of joules dissipate harmlessly outside in earth. Every wire inside every incoming cable...