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  1. DavidHP

    DC Relay & inductive loads

    Thanks all for your suggestions. I am about to test some bidirectional diodes. Other than testing the relay with the diode repeatedly to see how long the contacts last, how do I know that the diode is working?
  2. DavidHP

    DC Relay & inductive loads

    I am trying to protect the relay contacts. This is for a new product so I'm not trying to solve a one time problem. There are currently 60+ units in the field and from what I have read I should be protecting the relay contacts so they will last a reasonable amount of cycles.
  3. DavidHP

    DC Relay & inductive loads

    Hello, I am seeking help in specifying the necessary components to protect three DC relays while switching off a DC inductive source. The battery is 12 VDC and the motor draws up to 50 amps (until a 25amp push to reset circuit breaker pops) but normally draws from 16 to 30 amps. Also, the motor...
  4. DavidHP

    Pipe thread engagement?

    Thank you Mike. Your program is very helpfull. Every ME should have one. David
  5. DavidHP

    Pipe thread engagement?

    I am trying to learn the normal depth/lenght of pipe thread engagement. More specifically how far do commercially available 2" NPT pipe threads thread into a 2" NPT fitting?
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