N10-005 · Question #770
A cable with visible space between the ends of the copper wires and the RJ-45 connector will cause which of the following problems to occur?
The correct answer is B. Short. A gap between the copper wire ends and the RJ-45 connector indicates the conductors are not fully seated, allowing adjacent wires to contact each other and cause a short circuit.
Question
A cable with visible space between the ends of the copper wires and the RJ-45 connector will cause which of the following problems to occur?
Options
- AEMI
- BShort
- CReversed TXRX
- DdB loss
How the community answered
(53 responses)- A4% (2)
- B92% (49)
- C2% (1)
- D2% (1)
Why each option
A gap between the copper wire ends and the RJ-45 connector indicates the conductors are not fully seated, allowing adjacent wires to contact each other and cause a short circuit.
EMI (Electromagnetic Interference) is caused by external electrical fields disrupting the cable signal, not by a crimping defect involving wire seating.
When copper conductors do not fully advance to the front of the RJ-45 connector, the uninsulated wire ends can touch neighboring conductors inside the connector housing, creating a short circuit. This is a physical crimp defect where wire pairs make unintended electrical contact. The resulting short can disrupt or completely break network connectivity on the affected pairs.
A reversed TX/RX problem occurs when transmit and receive wire pairs are swapped in the pinout, not from wire ends failing to reach the connector pins.
dB loss refers to signal attenuation over cable length or due to poor conductor quality, not a direct result of improperly seated wires in a connector.
Concept tested: RJ-45 crimp defect causing short circuit
Source: https://www.flukenetworks.com/knowledge-base/dsx-cableanalyzer-series/shorts-and-opens-cabling
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