Bought a house built in the 1970’s in a 1970’s neighborhood. It has a 200AMP main panel. A serviceman replacing 1 of the 2 mainboards in the refrigerator suggested that I install an SPD inline in each circuit that has electronics because he’s had very many calls to replace electronics in this locale due to many transient spikes and power surges. He considers our power supply “dirty”.
It would be easy to add an SPD to the service panel. It’s possible with some rearranging to add (depending on model) the 220V 20, 30 or 50AMP breaker required to install a Type 2 SPD that will cover the whole house. I’m curious why the device requires this overcurrent protection. Thanks.
Best Answer
The overcurrent protection is for when the SPD itself evenutally fails — failing shorted is a fairly common occurance.