The spiral shield, in which individual strands (wires) of copper are wound in parallel around the cable interior, is a relatively simple but nevertheless useful cable shielding variant for various applications. The winding is very tight and always in one direction, i.e. the strands do not cross each other. Thus, an almost complete coverage (90% to 95%) can be achieved to, quite effectively, counteract electromagnetic interference.
In addition, such cables are highly flexible due to the numerous individual flexible wires. A characteristic feature here is the very low "looping" propensity when it comes to laying the cable. High-quality cables featuring spiral shielding are characterized by the high copper quality of the shield strands.