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  1. trevorarmco

    arc flash energy question

    1.2cal/cm2 will cause a second degree burn. That's 5 joules/cm2, or 5watt-seconds/cm2. My soldering iron is 25W, but the tip probably emits 10W of heat, the rest being lost elsewhere. Now- hold the tip- probably 0.5cm2- on your face for 0.25 seconds and see how it feels. Tell me when the blister...

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