It had the required shielding and warnings about opening the box. That said, the spool of cable was likely 2500' of CAT-6e cable. In the root cause analysis it was estimated the voltage potential on the cable was between 210 and 280V and the current levels could have reached 500mA (a bit more than 100W of 'leakage'). That was well outside the what the test gear was "expecting" from a cable that it was testing.