A Range of Body Impedance Values for Low Voltage, Low Source Impedance Systems of 60 HZ

The severity of electric shock to humans from low voltage (60 Hz) low source impedance systems is dependent on many variables. These factors include the body impedance, current magnitude and duration, voltage and frequency of the circuit, and the current path traversed in the body. Several authors have investigated safe voltage and current limits that humans can withstand. As a result, thresholds have been established of the body's response to 60 Hz alternating current of a few milliamperes in low voltage systems. This report evaluates the many published findings as a means of recommending a range of body impedance values. While the authors have endeavored to present as comprehensive a review as possible, a subject of this nature precludes a completely exhaustive literary search.