|I have read the older thread, and there was plenty of inaccurate info - so I felt the need to correct. "electricity" does not flow, LOL, current does. Voltage is the resulting pressure. This said, here are my 2 cents:|
Most voltage surges occur when high-power equipment, such as any motors (vacuums, garage door), heating elements (electric ovens, large printers), heavy battery chargers, etc'. are turned ON/OFF. Some do by nature, such as your iron or hot-plate. a seized motor is the worst case, since it draws max power when the shaft is locked, plus the added surge. (TIP: start your vacuum when it's off the carpet)
A dedicated circuit for your office is a great idea, unless you want to dedicate a circuit for your vacuum cleaner in every room...
A surge suppressor (suppressor, not eliminator) does just that, it suppresses sudden changes in voltage (so does your PC power-supply, to an extant). without getting too technical, the surge is best described in term of the energy it delivers, and hence the joules rating.
A lightning hit is an extreme case, and I wouldn't expect a $30 suppressor to prevent the damage.
and now to the discussion: what kind of joules rating should your suppressor have?