#814 1894 · Underwriters' Electrical Bureau (William Henry Merrill) · Product safety testing / insurance
Insurers couldn't each test every new electrical gadget, so they built one shared lab to test all of them
the problem
No single insurer could evaluate the flood of new, unproven electrical products safely
background
The 1893 World's Columbian Exposition in Chicago showcased the newest wonders of electricity — alternating current lighting and equipment on a scale the public had never seen — but the fair's own buildings, wrapped in cheap, flammable jute covering, kept catching fire, and Chicago's fire insurance authorities couldn't tell whether the new electrical wiring and equipment were partly to blame, or why the fire alarm systems meant to catch these fires kept malfunctioning.
Electricity was spreading into homes and businesses far faster than anyone's ability to verify which of the flood of new devices, wiring methods and installations were actually safe, and no single insurance company had the specialized engineering expertise, or any reason to build it alone, to individually test every new electrical product before deciding whether to insure a building that used it — every insurer needed essentially the same answer to the same question.
what everyone would do
Have each individual insurance company build or hire its own electrical testing expertise to evaluate every new device before writing a policy on a building that used it — duplicating the same specialized, expensive capability across every insurer in the industry for products that were fundamentally the same regardless of which company's policyholder installed them.
what they saw
The risk a piece of electrical equipment posed didn't actually depend on which insurance company was writing the policy — a faulty wire was equally dangerous no matter who insured the building. That meant the assessment itself was a shared, non-competitive need: insurers weren't competing on whose testing was more accurate, they all just needed the same answer. A single, independent lab funded collectively could answer that question once for every insurer at once, instead of each company duplicating the same expensive, specialized evaluation.
the move
William Henry Merrill, an MIT-trained electrical engineer who had inspected the fair's wiring, was backed by the Chicago fire insurance associations to open an independent testing laboratory in 1894 — a small operation above a fire patrol station with two employees and $350 worth of equipment — whose sole purpose was to test new electrical devices for fire and shock risk and issue a single, trusted verdict every insurer could rely on instead of testing separately.
why it works
By funding one small lab jointly rather than each building in-house expertise, the Chicago fire insurance associations got a credible, technically rigorous answer to "is this device safe" at a fraction of what duplicating that capability across every insurer would have cost, and because the lab had no stake in any individual insurer's business, its judgments carried a neutrality no single company's internal testing could claim. Once the lab's approval became a recognized, trusted mark, manufacturers had a direct incentive to submit their own products for testing voluntarily — a maker without the mark was implicitly signaling its product hadn't cleared independent scrutiny, which made compliance self-reinforcing rather than something regulators had to force.
the payoff
The Underwriters' Electrical Bureau, incorporated as Underwriters' Laboratories in 1901, gave insurers a shared, independent answer to a question none of them could efficiently answer alone, and manufacturers began submitting products voluntarily to earn the lab's mark of approval, since a product without it implicitly signaled it hadn't passed independent scrutiny.
where it breaks
It only works if the testing body stays genuinely independent of the industry funding it — a certification lab that becomes financially dependent on pleasing the manufacturers it tests, rather than the insurers or public relying on its judgment, loses the neutrality that made its mark worth trusting in the first place. And it depends on the underlying hazard being one where a single objective technical answer actually exists and applies uniformly across users, which works cleanly for a physical safety standard like electrical wiring but breaks down for judgments that are genuinely context-dependent.
what came after
The UL mark became one of the most recognized safety symbols in the world, and the underlying model — a single, independent, industry-funded testing body whose certification substitutes for every individual company duplicating the same assessment — became the template for product safety certification across dozens of industries far beyond electricity.
references
- [1]Our HistoryUL Research Institutes, 2023ul.org
- [2]History of Underwriters Laboratories, Inc.FundingUniverse, 2004fundinguniverse.com