Identifying Shielded Twisted Wires with Connectors

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In summary, the conversation discusses a problem with a harness containing 30-pin closed connectors and a dozen twisted shielded wires. The individual needs to mark the wires to identify them, but is having trouble due to the low voltage shield blocking the signal and the high voltage sensor reacting to every wire. A suggestion is made to use a low voltage flash light and test leads to identify the connections, or to use a multimeter for more accurate results.
  • #1
DLINNI2000
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I have a harness with closed connectors (about 30 pins in each one of them),with about a dozen of twisted shielded wires.
need to mark them to know which one is which.
Tried to connect a needed pair to a ac power supply and find a wire with ac sensor, but on the low voltage shield blocks the signal, on a higher voltage sensor reacts on every wire.
Please help, is there determine to were every wire belongs to?
Thank you.
 
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  • #2
Welcome to PF.
So you don't have a multimeter.
Get a small low voltage flash light etc, then get a couple of wires, connect one to each side of the switch.
Those wires are your test leads. With the light switched off, touch the ends of the two wires, it will light.

Connect one test wire to one pin at one end of the cable.
Brush the other wire against the pins at the other end until you find any connection.
Record the connection, then move to the next pin, repeat.

The outer shells may be connected. Some pins may tie to more than one pin at the other end.
 
  • #3
Or just use a multimeter. Trying to do work like this without one is going to be difficult at best.
 

1. How do I identify shielded twisted wires with connectors?

To identify shielded twisted wires with connectors, you can visually inspect the wires for any metal braiding or foil wrapping around them. You can also use a multimeter to test for continuity between the connectors and the wires, as shielded wires will have a separate wire for grounding.

2. Why are shielded twisted wires with connectors important?

Shielded twisted wires with connectors are important because they provide protection against electromagnetic interference (EMI) and radio frequency interference (RFI). This interference can affect the performance of electronic devices and can even cause malfunctions or damage.

3. How do I determine the appropriate connector for shielded twisted wires?

The appropriate connector for shielded twisted wires will depend on the specific application and the type of connector used. Some common connector types for shielded wires include RJ45, BNC, and D-sub connectors. It is important to ensure that the connector is compatible with the wire gauge and has proper shielding capabilities.

4. Can shielded twisted wires with connectors be used for outdoor applications?

Yes, shielded twisted wires with connectors can be used for outdoor applications as long as they are designed and rated for outdoor use. These wires will typically have additional insulation and shielding to protect against moisture, UV rays, and other environmental factors.

5. How do I troubleshoot issues with shielded twisted wires with connectors?

If you are experiencing issues with shielded twisted wires with connectors, you can start by checking for any damage or loose connections in the wiring. You can also use a multimeter to test for continuity and proper grounding. If the issue persists, it may be necessary to consult a professional or replace the wires and connectors.

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