What is the latest revision to the IEC 601 18-4?
The new revised IEC 60118-4 with 400mA/m as the new reference overrides the old vastly misunderstood 100mA/m standard. A level of 400mA/m must be achieved in a loop system according to the new standard. It is NOT sufficient with only 100mA/m which is a widely spread misunderstanding of the old standard. This has caused and is causing many weak and noisy installations based on cheap and under-powered amplifiers. The 100mA/m has therefore been removed in the revised standard and should not be referred to any longer.
