4.3.3 Voltage Drop.4.3.3.1 Purpose. This test determines the voltage drop associated with the electrical resistance of theconductor crimp(s) and contact interface regions at nominal current conditions. This voltage drop is then usedto calculate the Total Connection Resistance.4.3.3.2 Equipment. Digital Multimeter (DMM) DC Power Supply (0 to 20) VDC at (0 to 150 A) Current shunts4.3.3.3 Procedure.1. Prepare twenty (20) (at least ten (10) male and ten (10) female) terminal samples per section 3.3,using the largest gage size conductor and insulation thickness applicable to the design of the terminalto be tested.2. For purposes of this test, the male terminal shall be inserted to a precise depth into the female.Standard practice is that, in the worst case, there shall be at least 1 mm of excess insertion betweenthe rearmost contact point with the Female Terminal and the start of any lead-in taper on the MaleTerminal, as illustrated in Figure 19. This dimension is to be calculated from the GM Approved terminaldrawings, taking into account the worst case tolerances. Each male terminal is to be suitably markedso test personnel can make the final mating of the test terminal pairs to the correct depth. Score marksor any other marking that might introduce contaminants or alter the strength or conductivity of eitherterminal or the interface are not permitted. Do not use the connector housings, even unsealed, tocontrol terminal insertion since the housings will alter heat dissipation during testing. This willcompromise test repeatability and will invalidate comparisons of data collected for various terminals.
4.3.3 Voltage Drop.4.3.3.1 Purpose. This test determines the voltage drop associated with the electrical resistance of theconductor crimp(s) and contact interface regions at nominal current conditions. This voltage drop is then usedto calculate the Total Connection Resistance.4.3.3.2 Equipment. Digital Multimeter (DMM) DC Power Supply (0 to 20) VDC at (0 to 150 A) Current shunts4.3.3.3 Procedure.1. Prepare twenty (20) (at least ten (10) male and ten (10) female) terminal samples per section 3.3,using the largest gage size conductor and insulation thickness applicable to the design of the terminalto be tested.2. For purposes of this test, the male terminal shall be inserted to a precise depth into the female.Standard practice is that, in the worst case, there shall be at least 1 mm of excess insertion betweenthe rearmost contact point with the Female Terminal and the start of any lead-in taper on the MaleTerminal, as illustrated in Figure 19. This dimension is to be calculated from the GM Approved terminaldrawings, taking into account the worst case tolerances. Each male terminal is to be suitably markedso test personnel can make the final mating of the test terminal pairs to the correct depth. Score marksor any other marking that might introduce contaminants or alter the strength or conductivity of eitherterminal or the interface are not permitted. Do not use the connector housings, even unsealed, tocontrol terminal insertion since the housings will alter heat dissipation during testing. This willcompromise test repeatability and will invalidate comparisons of data collected for various terminals.<br>
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