Portecting your home from surges

You can protect major appliances such as the dryer, washer refrigerator and dish washer with a home surge protector you power company installs for a monthly fee. The one in my home is installed behind the power meter.

This whole house protector has a colored light that should be on at all times. If the light goes off, call the power company to replace the unit. 


Surges can also come through other avenues such as coax cable you use for the cable TV, the Internet and Voice over IP phone service. The whole house protector is unlikely to protect your low voltage equipment such as cable modems, hubs, switches and so forth.

Many people think a power strip will do the job such as the one below, but most are not fast enough or the job. The power supply on your PC actually does a better job of handling surges and brown outs than one of these cheap surge protectors. Remember, lightning travels at the speed of light.

Not recommended to protect sensitive equipment

The best solution is a uninterpretable power supply (UPS) that contain a battery to handle brown outs and can also protect sensitive computers and LCD or LED screens from electrical damage. I you have an old tube monitor, it pulls too much current and should not be connected to a UPS.

Rightardia likes the  Cyperpower UPS because it has an LCD screen that allows someone  to check the battery and input and output voltage as well as amps and hertz. It also has a load meter to show if you are overloading the the UPS.

For some reason, many UPS makers for home users have not created web based software to manage these devices. Unless you use Windows or sometimes a Mac, you have no easy way to check the UPS to make sure the battery is still working. The LCD display overcomes this limitation.

There are also some companies that do make great surge protectors. Two Rightardia would recommend are Panamax and Triplite.

Many of these well designed surge protectors will protect you from surges over coax, phone lines (RJ-11) and Ethernet.

Another solution is a surge protected receptacle.Both Panamax and Levitron make these.  The Panamax protector requires wire screws to connect to one pair of electrical wires. The Levitron has connectors than can handle two pairs of electrical wires. Most Home Depots carry Levitron receptacle surge protectors. Both units have green lights that stay on as long as the surge protector is working.This is a far better option than a power strip.

In most cases you will need a mix of UPS and surge protectors to protect sensitive equipment and major appliances in your home.

sources:

https://www.progress-energy.com/florida/home/products-services/surge-protection/index.page



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Mittens: Distribution of wealth is about envy

Mittens was asked if questions of the distribution of wealth and power were a matter of jealousy or fairness, Mittens stated:

You know, I think it’s about envy. I think it’s about class warfare. When you have a president encouraging the idea of dividing America based on 99 percent versus one percent, and those people who have been most successful will be in the one percent, you have opened up a wave of approach in this country which is entirely inconsistent with the concept of one nation under God. The American people, I believe in the final analysis, will reject it.

And asked if there is any legitimate question one can ask concerning the discrepancy of wealth in America, Mitt Richey  said this:

I think it’s fine to talk about those things in quiet rooms and discussions about tax policy and the like.


source: Mario Piperni

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Power sockets can pickup what people type on a computer.

Security researchers found that poor shielding on some keyboard cables can provide data over the power grid. Military security people have known about this for a long time. The TEMPEST program exist in the US to make sure that certain facilities are, in fact, secure. Power has to be filtered in secure facilities.

By analysing the information leaking onto power circuits, researchers could intercept what a person was typing. Data could be collected at a distance of up to 15 m.

"Our goal is to show that information leaks in the most unexpected ways and can be retrieved," wrote Andrea Barisani and Daniele Bianco, of security firm Inverse Path.

The research focused on the cables used to connect PS/2 keyboards to desktop PCs.

The six wires inside a PS/2 cable are typically "close to each other and poorly shielded". This means that information travelling along the data wire, when a key is pressed, leaks onto the earth (ground in the US) wire in the same cable.

The earth wire, via the PC's power unit, connects to the plug in the power socket. The data travels along PS/2 cables one bit at a time and uses a clock speed far lower than any other PC component. This make it easy to pick out voltage changes caused by key presses with a digital oscilloscope,

The attack is due to be demonstrated at the Black Hat conference that takes place in Las Vegas from 25-30 July. One solution might be to replace the PS2 keyboard with the newer USB keyboard.

http://news.bbc.co.uk/2/hi/technology/8147534.stm

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