This is the sort of thing, that companies and civilians may find useful for protecting their electronics. Doubt it would have to be used actually but
it never hurts to have the information available should it be needed.
Does any one have any ideas on a practical use for this?

This interface control document (ICD) defines the interface between the High-altitude
Electro-Magnetic Pulse (HEMP) protection hardware of the Tenant system and the
HEMP vault of the Terminal Equipment Building (TEB). The Tenant system
consists of the Fixed Distributed System (FDS). The FDS HEMP Protection System
(FDS HPS) provides HEMP protection to the TEB from transients on the FDS
cables.
The HEMP vault conduit provides electrical shielding and mechanical protection for
the power/ground cables, system signal fiber, status/control fibers, and low voltage dc
cables between TCTB and the EMB wall.
Space and Naval Warfare Systems