Power Watchdog
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How to tell the power went out
Six ways to know the pedestal died, what each one costs you in delay and false alarms, and the pairs that tell you what actually happened rather than just that something did.
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104 volts, and nothing tripped
Surges get the attention and low voltage does the damage. What a sagging pedestal looks like on a chart, what a miswired one looks like on the first poll, and why the EMS rather than the alert is what protects the rig.
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The pedestal is fine and the rig is dead
Three readings, in order, and the answer is usually immediate: is the post alive, did the EMS choose this, and how much of the rig is still drawing. What they decide is which direction you walk.