What are the key benefits provided by ILC?

By using a low leakage isolation transformer, typical ground leakage current can be reduced to about 100 micro amps (which is typical) even if the ILC is powering a load with high-leakage current of several milliamps or even more. Therefore, using an ILC can reduce ground leakage current by 10:1 or even 100:1.
If multiple ILC units are used to power all the “leaky” IT equipment inside a high-rise building, then reducing ground leakage current by more than 90% will solve most of the problems associated with ground potential differences between floors. An ILC is designated as a “Separately Derived Power Source” under National Electrical Code 250-5D and recommended by US federal government’s FIPS Publication 94 for elimination of problems caused by presence of neutral voltage, noise and transient voltages on the neutral line (common mode noise and transients).