
supply end (4) Shielded Cable, Wiki: In order to prevent ground loops, shielded cables are often wired by grounding only the source end of the shield.
Shielded cables are larger, stiffer, and need to be grounded, but they might be the best option if transmission speed and extra security (avoidance of alien crosstalk and signal containment) are vital to the operation.
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Yes, according to the electrical code, the AC currents in electrical cables must be equal, otherwise they must cancel each other out. In spite of the roughly 1/4" gap between the wires, at least. This is done to stop eddy current heating rather than to cause interference.
The individual wire pairs of shielded twisted pair cable (STP) are wrapped in foil twice, providing double protection. Every pair of wires in an unshielded twisted pair cable (UTP) is twisted together. After that, the wires are covered in tubing with no additional security.
For Ethernet networks, EMI is typically not a big issue in a typical home or small office setting. In certain situations, further shielding is not required because the twisted pairs inside Ethernet cables are more than sufficient to guarantee high-quality data flow despite slight levels of interference.
However, you must ensure that the Ethernet cable you purchase is the appropriate type. Older connections lack the shielding necessary to preserve the integrity of your game signal and won't offer enough bandwidth to guarantee that your latency is unaffected.
Notably, every shielded Ethernet cable needs to have a ground connection for the shields. It's likely that ground loop currents and the corresponding Ethernet signal interference will exist if your cable has the wrong ground connection.
In order to network computers with a local area network (LAN) between residences or other buildings, Cat 6, Cat 5, or Cat 5e Ethernet cables can be run outdoors.
Unshielded Cat6a cables typically function well in homes and small offices, unless they are crammed full of equipment or located close to power lines. Shielded Ethernet connections are usually not necessary in a residential or small business setting because of the low level of interference in the area.