The grounding method of the optical cable of the splice box on the structure: the top of the structure, the lowest fixed point (before the remaining cable) and the end of the optical cable should be connected to the structure with a reliable electrical connection through. The grounding method of the optical cable of the splice box on the structure: the top of the structure, the lowest fixed point (before the remaining cable) and the end of the optical cable should be connected to the structure with a reliable electrical connection through. Overhead ground wire composite optical cable (OPGW) should be reliably grounded at the entry portal to prevent the optical cable from being broken by induced voltage and interrupted when a short circuit occurs in the line. The grounding requirements are as follows: 1. The grounding method of the. This paper, OPGW Grounding Techniques for Safe Fiber Splicing, serves as a detailed resource for electrical engineers, field technicians, and safety professionals involved in the maintenance and spli. Be sure to follow ALL guidelines and recommendations set forth by the operator. “Grounding Option 1: Shield Grounded at One End Only” is commonly used in scenarios involving low frequencies, specifically audio frequencies and those below 100 kHz.