I was wondering. I hope someone can help.
Blackout: Total loss of utility power. CAUSE - Blackouts are caused by excessive demand on the power grid, lightning storms, ice on power lines, car accidents, backhoes, earthquakes and other catastrophies. Sag or Brownout - Sags or brownouts can be caused by heavy equipment coming on-line, short circuits, undersized electrical circuitry, or when the utility company deliberately decreases voltage levels in order to cope with peak load times (rolling brownouts). Brownouts generally occur during the summer heat waves. ucc.uconn.edu/~wwwucc/ddd0006
Power surges are a major cause and then old faulty equipment.
