The War of Currents: Fascinating Facts

Proteck'd EMF ApparelHealth & EMF Specialists

Published October 05, 2026·10 min read

Edison electrocuted animals to prove Tesla's alternating current was deadly. Tesla shot lightning through his own body to prove it was safe. The War of Currents wasn't a polite scientific debate. It was one of the nastiest corporate battles in American history, and its outcome still determines how electricity reaches your home today.

What Actually Happened During the War of Currents?

The War of Currents kicked off in the mid-1880s and ran until roughly 1893. On one side: Thomas Edison, who'd built his empire on direct current (DC) power. His Pearl Street Station in lower Manhattan, which opened on September 4, 1882, was the world's first commercial central power plant ^[1]. It served 85 customers and lit about 400 lamps. Edison had serious skin in the game. His entire business model depended on DC staying dominant.

On the other side was Nikola Tesla, a Serbian-American inventor who had actually worked for Edison before their bitter falling out. Tesla championed alternating current, which could travel much farther over wires without losing power. In 1888, George Westinghouse bought Tesla's AC motor patents for $60,000 plus royalties, a sum worth roughly $2 million today. Westinghouse saw what Edison refused to admit. DC couldn't scale.

Edison's response was genuinely disturbing. He launched a propaganda campaign to convince the public that AC was lethal. His employees publicly electrocuted stray dogs, cats, and even a circus elephant named Topsy (though that event happened later, in 1903, and historians still debate Edison's direct involvement). He also secretly bankrolled the development of the electric chair, specifically designed to run on Westinghouse's AC, so people would associate alternating current with death.

The whole ugly saga came to a head at the 1893 Chicago World's Fair. Westinghouse underbid Edison's General Electric to light the entire exposition using AC power. Over 27 million visitors watched Tesla's system illuminate the fairgrounds. It was over. If you want more on how electricity reshaped civilization, check out How Electricity Changed the World: What Life Was Like Before.

Why Did Alternating Current Beat Direct Current?

It comes down to physics and money. Direct current can only travel about a mile from the generating station before it loses too much energy. That meant Edison's vision required a power plant on practically every city block. Think about the cost. Think about the pollution. In dense Manhattan, it barely worked. For the rest of America? No chance.

Alternating current can be "stepped up" to high voltages using transformers, sent hundreds of miles over transmission lines, then "stepped down" to safe levels at your house. Tesla's polyphase AC system, which he patented in 1888, made this efficient and practical. One power plant could serve an entire region. According to the U.S. Energy Information Administration, the modern U.S. grid now includes over 160,000 miles of high-voltage transmission lines, all carrying AC power ^[2].

Here's the irony, though. DC is making a comeback. Modern electronics, from your laptop to LED lights to electric car batteries, all run on direct current internally. And high-voltage DC transmission lines are now used for very long undersea cables and intercontinental connections. Tesla won the war, but Edison's technology never actually died.

History of electricity facts like these aren't just interesting cocktail-party material. They explain why your power grid works the way it does, and why the electromagnetic fields in your home behave the way they do. For a deeper look at how electromagnetic radiation works, take a look at 7 Fascinating Facts About Electromagnetic Radiation: That Will Change How You See the World.

How Does the History of Electricity Connect to Modern Energy Consumption?

When you pay your electric bill each month, you're paying for a system designed over 130 years ago. The basic architecture hasn't changed that much. Power plants generate electricity (mostly by spinning turbines), transformers step up the voltage, transmission lines carry it to your neighborhood, and local transformers step it back down. According to the U.S. EPA, the average American household spends roughly $2,000 per year on energy, and electricity generation is the second-largest source of greenhouse gas emissions in the country [3].

When you reduce the history of electricity facts to practical decisions, this is where it starts. The grid Tesla helped build was revolutionary. But it's also inefficient by modern standards. The EIA estimates that about 5% of electricity is lost during transmission and distribution. That might not sound like much. Until you realize it translates to billions of dollars and millions of tons of CO2 every year.

So what can you actually do? The EPA's ENERGY STAR program, created in 1992, is one of the simplest starting points. Replacing old appliances with ENERGY STAR certified models can cut household energy use by 20 to 30 percent [3]. Unplugging "phantom loads," those chargers and devices that sip power even when they're turned off, can save another 5 to 10 percent. Small steps. Real money.

Switching to cleaner energy matters too. If your utility offers a green energy option or you can install solar panels, you're sidestepping the fossil-fuel powered grid that Tesla and Westinghouse built. The U.S. Energy Information Administration reports that as of 2023, about 21% of U.S. electricity comes from renewable sources, up from just 9% in 2005 ^[2]. Progress is real, but individual choices still move the needle. For more on how electricity reshaped everything from daily routines to industry, read How Electricity Changed the World: The Surprising Story.

What Are the Hidden Consequences of Living on the Grid?

Here's the part that doesn't get talked about enough. Every wire carrying alternating current generates an electromagnetic field. Every appliance, every smart meter, every Wi-Fi router. The alternating current system Tesla championed is brilliant for power delivery, but it also means we're surrounded by 60 Hz electromagnetic fields (50 Hz in Europe) every second of every day. This is a relatively new phenomenon in human history. Only about 140 years old.

The World Health Organization's International Agency for Research on Cancer classified extremely low frequency (ELF) magnetic fields as "possibly carcinogenic to humans" (Group 2B) back in 2002 [4]. That doesn't mean your toaster is giving you cancer. It means the science isn't settled, and there's enough epidemiological evidence, particularly from studies on childhood leukemia near power lines, that researchers think we should be paying attention.

This is where understanding electrical history becomes genuinely practical. You can't opt out of the grid (well, most of us can't), but you can be thoughtful about your exposure. Using EMF-shielding clothing and accessories is one approach gaining traction. Proteck'd EMF Protection makes apparel with silver-fiber technology designed to block electromagnetic radiation. Their Faraday Collection, named after Michael Faraday, the 19th-century scientist who discovered electromagnetic induction, uses conductive fabrics to create a personal shield against EM fields.

If you're curious about the science behind EMF shielding and how it works, Learn About EMF Protection on Proteck'd's FAQ page. It's a topic worth understanding, especially once you realize the same principles Faraday discovered in the 1830s are still the basis for modern shielding technology.

Did Edison and Tesla's Rivalry Shape More Than Just the Grid?

Absolutely. And in ways that reach right into your pocket. Tesla's work on AC power was just the beginning. He also pioneered radio transmission (Guglielmo Marconi usually gets the credit, but the U.S. Supreme Court ruled in 1943 that Tesla's patents had priority), fluorescent lighting, and early concepts for wireless energy transfer. The man held over 300 patents across 26 countries. Without his work, the smartphone in your hand wouldn't exist in its current form.

Edison, meanwhile, built something arguably more lasting than any single invention: the research laboratory itself. His Menlo Park facility in New Jersey, established in 1876, was the first dedicated industrial research lab. The model he created, teams of engineers and scientists working together on commercial problems, became the template for Bell Labs, Xerox PARC, and eventually Google X. Edison didn't just invent the lightbulb. He invented the process of invention.

Their rivalry also revealed how corporate power can shape public perception of technology. Edison's smear campaign against AC power is one of the earliest examples of what we'd now call FUD (fear, uncertainty, and doubt) marketing. That playbook never went away. Think about the debates around 5G safety, or the ongoing arguments about whether EMF exposure from consumer electronics is something to worry about. The pattern Edison established, using fear to protect a business model, is still alive and well.

For more surprising connections between tech history and modern life, check out 10 Surprising Tech Facts That Sound Too Weird to Be True: The Complete List and 12 Surprising Tech Facts You Didn't Know: The Complete List.

How Can You Reduce Your Energy Footprint While Staying Informed?

Let me bring this full circle. When you reduce the history of electricity facts to something actionable, you end up in a surprisingly practical place. Knowing that your grid runs on AC helps you understand why transformers hum and why distance from high-voltage lines matters. Knowing that the grid loses 5% of energy in transmission helps you appreciate why local solar generation is so efficient. And knowing that every AC circuit creates electromagnetic fields helps you make informed choices about your living environment.

Practical energy reduction doesn't require a history degree. Start with the easy stuff. The U.S. Department of Energy says that adjusting your thermostat by just 7 to 10 degrees Fahrenheit for 8 hours a day can save up to 10% on annual heating and cooling costs. Switching to LED bulbs, which use 75% less energy than incandescent ones, is another quick win. And those phantom loads from devices on standby? A 2015 study by the Natural Resources Defense Council found they cost U.S. consumers $19 billion per year collectively.

If you're also thinking about the EMF side of things, and more people are every year, consider the environment your devices create around you. We live inside a web of electromagnetic fields that Tesla and Edison could barely have imagined. A modern smart home can have dozens of wireless devices all broadcasting at once. Being thoughtful about when devices are on, how close they are to your body, and whether shielding makes sense for your situation isn't paranoia. It's the same kind of evidence-based thinking that led Westinghouse to bet on AC over DC. You look at the facts, and you choose wisely.

The War of Currents ended over a century ago, but its consequences are still unfolding. Every time you flip a switch, charge your phone, or wonder about that buzzing feeling near a power strip, you're living inside the world Edison and Tesla built. The least you can do is understand how it works. And maybe save a few bucks on your electricity bill while you're at it.

About the Author

Proteck'd EMF Apparel

Health & EMF Specialists

The Proteck'd team covers EMF protection, silver-fiber apparel, and practical ways to reduce everyday radiation exposure. Every piece Proteck'd ships is designed, tested, and worn by the people who build it.