[Amps] RG-213 Hi pot ?

[Jim Thomson]

Does anybody know how much max V is on  RG-213 ?   Like what are the results if a hi-pot tester used..
and say cranked up to the point where  just a few microamps  occurs .     I have an application where I need a  HV
cable, less than 10 ft, that will  easily handle 5700 /  7700  vdc.   It will be hardwired at both ends, no HV connectors. 
And with braid peeled way back from the center conductor, like  2-4 inches .  
The plan was to also wrap some red electrical tape  every few inches  along its  entire  length, to readily identify it as a HV cable.

Tnx....  JIm   VE7RF