IEC 61386-21 pdf – Conduit systems for cable management – Part 21: Particular requirements – Rigid conduit systems 10.4.101.2 Samples having a length equal to 30 times the nominal diameter, are bent so thatwhen released, they have an angle of (90 ± 5) °, so that the inside radius of the bend is equalto six times the nominal diameter. 10.4.101.3...