With zLock™  we can supply you with IEC power cords that lock into place on both the PDU and the IT gear side, without making any changes to the receiving connectors or equipment.
Releasing the cords is as easy as turning the twist lock or pulling the red sliding tabs.
Dual-sided locking cables in C13-C14, C14-C15 & C19-C20 configurations are standard available in lengths between 0,5m and 2,5m.  Colours are black or red, but both colour and cable lengths can be adjusted to meet your exact requirements.