Electrical frequencies and voltages drop as power line currents increase, necessitating automatic or manual interruption of loads (blackouts) to protect grids.

FORBES: Wind Energy's Overblown Prospects

Sponsor assumes no responsibility for any error, omission, interruption, deletion, defect, delay in operation or transmission, communication line failure, theft or destruction or unauthorized access to, or alteration of, entries.

WSJ: Blindfold Brackets 2013: Official Rules

Sponsors assume no responsibility for any error, omissions, interruption, deletion, defect or delay in operation with transmission, communications, line failure, theft or destruction or unauthorized access to or allegation of submissions.

CNN: Legal Disclosures