Laying cables out in the open or exposed? In the USA, this is usually only possible with TC-ER approval. The increased flame retardancy required for this means that many cables are less flexible - a major disadvantage when used in moving drag chains. However, with the MULTIFLEX 600 and MULTIFLEX 600-C control cables and the TOPSERV 600 VFD and TOPSERV 650 VFD drive cables, HELUKABEL has solutions in its portfolio that combine TC-ER-compliant flame retardancy with high flexibility. This makes them ideal for industrial applications, such as in drag chain systems.