Ice,
Thanks for the reply. You are correct. I didn't give you the whole facts when I asked you a question. Here is the existing condition and I have to tap this installation for a new work.
The existing 15kV cable comes into the utility tunnel from UG with an m/c armored cable. The armored cable transitioned (spliced) to 15kV CT rated open cables without a j-box after about 500' of run in the tunnel ( I guess they ran out of armored cable??). Can't verify how the gound conductor in the armored cable transitioned to individual open cables.
The support of cable is mixture of cable try, uni-strut support, and cable straps either on the wall or ceiling depend on the locations. Now, is this installation seems to meet NEC?