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Question:

Following a recent power outage that put the firm offline for 30 minutes, the executives have been debating how to avoid a repeat. They enlist your assistance as an IT specialist during the planning and design stages. How can you know how much of a surge suppressor can sustain, says one executive? So, what do you say to him?

A joule rating
Explaination

A suppressor's ability to handle a surge will be measured in joules. A higher rating in this area means you'll be able to protect yourself from greater line voltages more effectively.