A crimped electrical connection is suspected to be high resistance. How would you verify this without disconnecting the circuit?
- Measure the millivolt drop across the connection with a millivolt meter.
- Check the resistance across the connection using an ohmmeter.
- Apply a 250 volt megger test across the crimped terminal.
Explanation from PART66Online
A high-resistance joint is found by passing the normal circuit current and measuring the small voltage (millivolt) drop across the connection while it is live, since a poor crimp drops more volts for the same current. An ohmmeter cannot be used on a live circuit, and a megger high-voltage test is for insulation, not joint resistance.
I
IonutGabriel asked · 7 Feb 2019
how to measure with an millivolt meter without disconnecting the circuit?!!!
Community Comments (1)
J
Jordi
23 May 2020
you measure it parallel because it is voltage.
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