(ANSI: New York) -- Safety symbols—like those for high voltage, biohazards, a wet floor, and radioactive materials—depend upon consistency and bold graphics to warn against specific hazards and personal injury. A revised American National Standard from the National Electrical Manufacturers Association (NEMA) provides general principles for the design, evaluation, and use of safety symbols, as well as a procedure to evaluate a given image’s effectiveness in communicating its intended message.

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