ASTM B 497 - 00 (Reapproved 2006) Standard Guide for Measuring Voltage Drop on Closed Arcing Contacts

American Society for Testing and Materials (ASTM). Current edition approved June 1, 2006. Published June 2006. Originally approved in 1969. Last previous edition approved in 2000 as B 497 – 00. 3 p. This guide describes recommended procedures to accurately measure voltage drop across current carrying contacts and the parameters to be documented in order to effectively record the results. Such contacts normally carry current greater than 1 amp. The applicability of these procedures to contacts carrying smaller currents should be evaluated prior to application to such devices. Contacts carrying small current may also be evaluated using Test Method B 539 to measure contact resistance.