Two sources of surges,the most dangerous surges come from outside your home.These external surges are caused by lightning or an unstable power grid. Any connected to coaxial cable ( TV cable or a computer) is also prone to lightning.Smaller internal surges are generated within your home by heavy power users like your fridge or a/c.Small surge suppressors that protect one or several devices.You don’t have to understand the details just look for three things: 1- Clamping voltage:You want 330 volts or less.2-Clamping speed:5 nanoseconds or less.3-Energy dissipation: 500 joules or more.A whole house house suppressor protects every device in your house against external surges.But a whole house suppressor won’t stop internal surges.There are two types,an both require an electrician for installation. If it has a digital display , it definitely needs surge protection.
POWER SURGES
