1. RPC system cable routing Yang Changgen, Guan Mengyun IHEP, Beijing

2. Racks for the distribution boxes The racks for fixing the gas distribution crate, HV multiplexing box and the signal ROT box will be arranged at the edge of the main supporting structure, The racks will stand on the rack platform side by side for easily monitoring and maintenance. Side view front view Can people walk on the platform to check the bubbler and perform some maintenance? If so you have to provide stairway and add guardrail to protect people from falling.

3. We want to easily split each supporting units Left scheme demonstrates the cable routing of the RPC system, For the near site Totally, we have: 48channel HV cables; 7 branch of gas tubes; 4signal fibers; To split all supporting units, we need to disconnect those:  9×8HV cable;  8×16gas tube, Φ6mm;  16×1signal flat cable But we do not to disconnect all of them if we want to disconnect continuous two units. What these tubes mean? They are very long and cross 2m wide frames. If we put some slack of tubing here, in case of separation of the adjacent frames within 1m range, can we avoid to disconnect tubes?

4. For the far site We want to easily split each supporting units Left scheme demonstrates the cable routing of the RPC system, Totally, we have: 72channel HV cables; 11branch of gas tubes; 6 signal fibers; To split each supporting units, we need to disconnect those:  0HV single conductor wire;  6×16gas tube, Φ6mm;  8×1signal flat cable But we do not to disconnect all of them if we want to disconnect continuous two units.