Re: Whole House Surge protector
I wonder if that "600V" figure is based on the fact that the insulation on most household wiring is rated for 600V. It seems a bit fishy; there could be effectively a spark gap between the internal prongs of a receptacle, say, but there are so many variables and variations that there's no way you can count on some 600V rule of thumb.
Originally Posted by The Semi-Retired Electric
I am of the "more is better" opinion, but still the MOVs should be located near the protected device as voltage transients can be very localalized. For example, a laser printer can draw several amps when it is printing. When it stops printing, the current draw suddenly stops, and a surge can happen on that circuit. If your computer is on the same circuit, it can experience a small surge. Having the laser printer and the computer on a surge protector can protect both. (By the way, laser printers should NEVER be connected to a UPS. It will overload the UPS.)
When you start talking about stuff that happens in radio frequency ranges, weird things happen. For example, if you get some funky, high-voltage standing wave in the wiring and the MOV happens to be at a node and the device is at an antinode, the device blows up and the MOV doesn't know anything happened.
The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.