I bought a multicore cable which sats the conduction of the cable is 600v can I put 5 amps of power down this cable

The 600V rating pertains to the cable's insulation. Whether the cable will carry 5 amps of current depends on the application, environment, and factors such as the gauge of the individual conductors, the length of the cable, and the current duration.

I suggest you post in the electrical or electronics forum with a description of what you are trying to achieve for cable sizing assistance, code considerations, or other recommendations.