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EMI Characteristics
Because UTP cable lacks a shield, it is more sensitive to EMI than coaxial or STP cables. The latest technologies make it possible to use UTP in the vast majority of situations, provided that reasonable care is taken to avoid electrically noisy devices such as motors and fluorescent lights. Nevertheless, UTP might not be suitable for noisy environments such as factories. Crosstalk between nearby unshielded pairs limits the maximum length of cable runs.