I am interested which cable/wire type is better to protect against electromagnetic and radio interference/leakage of signal.
Is a twisted pair wire better than an untwisted, to protect against EMI/RFI and to reduce the leakage of signal/information from the cable?
Is a shielded wire better than an unshielded (both in twisted & nontwisted states), to protect against EMI/RFI and to reduce the leakage of signal/information from the cable?
Does the shielding have to be grounded? What happens if the shielding is not grounded? Benefits & Drawbacks?
I have read about these on the internet, but always found contradictions, so I would like if some electrical engineer expert would clarify these for me.