Power Distribution Unit: Power to computer and telco equipment (increasingly "twin-corded" to give dual power supplies) is divided into sub-circuits...

…each protected by a suitably rated breaker to protect against
over-load. Static switches allow "no-break" switching. Isolation transformers eliminate harmonic interference. "Wrap-around"
by-pass switches for maintenance should be incorporated.

A master PDU (MPDU) will control all distribution of power within
the facilty, lighting and general power. For very sensitive installations DRANETZ monitoring equipment will be fitted.