The multi-core power distribution cables undertake the crucial responsibilities in power distribution networks, and their continuity of service with a high level of reliability is essential for customers. The real-time current monitoring of power distribution cables is indispensable in order to ensure the stable power delivery. However, traditional current transformers (CTs) are not satisfactory because they are not applicable for multi-core measurement. This limits them only for substations usage where individual conductors of the multi-core cable are exposed. Previously, a magnetic-sensing-based current measurement technique was proposed to tackle the problem. By adopting this technique, a real-time current monitoring platform with magnetic sensing was developed unprecedentedly for multicore cables, and its effectiveness was validated on-site on a 22-kV three-phase three-core power distribution cable. The advantages of the proposed platform are compared with CTs and elaborated.