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This paper describes a transformer design chart by which the design of two winding, sixty cycle, low voltage transformers can be made without most of the time-consuming design procedures. Its use is intended for transformer design engineers; therefore, it provides only the winding information that varies for each design. A specific series of cores and operating conditions are assumed. The turns, wire size and approximate winding resistance of both the primary and secondary can be determined from voltage requirements and secondary volt ampere rating. Equations upon which the chart is based are given together with an example problem. A set of rules for applying the chart to other transformer designs is also given.