What Is Joule Rating?


Joule ratings measure your electrical appliance's ability to absorb power surges. 400 joules is a good rating for many devices and anything over 600 joules may be considered exceptional. 200 joules is usually enough to give you basic protection.
1 Additional Answer
Joule rating is a measurement that shows how much energy a surge suppressor can drive away from your electronic device or equipment in case of a power surge. The higher the joule rating the better for the safety of your equipment. It is worth to note that a surge suppressor does not guard your equipment from power sags.
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