This booklet addresses the fundamentals of securities custody and related. services, and provides guidance for examining those activities in national. banks. One of a series of specialized asset management booklets in the.
1 There are three levels of protection in the UL rating -- 330 V, 400 V and 500 V. Generally, a clamping voltage more than 400 V is too high.  Energy absorption/dissipation - This rating, given in joules, tells you how much energy the surge protector can absorb before it fails. A higher number indicates greater protection. Look for a protector that is at least rated at 200 to 400 joules. For better protection, look for a rating of 600 joules or more.
To find calories per joule, divide calories by joules: 1/4.186=0.2389 cal/joule. Because 4.186 joules is equal to one calorie, this is the number of calories in one joule.