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The likelihood of the true value of what you're measuring actually being 100.00 is virtually zero. There's a 95% chance the true value is between 100.10 and 99.90. There's a 68% chance the true value is between 100.05 and 99.95. Agreed?

Since resi. insulation temp is fixed at 60? to 90? and ampacity is determined by I² and amb. temp., can resi. wires and thermally operated CBs in Alaska legally carry more current?

I'm trying to calculate the AC resistance at 60 Hz of a copper pipe with 3/4" I.D., 1/16" wall thickness, and 7/8" O.D., not near any other conductors. Can anyone step me through this? It must be several times the DC resistance but I'd like to know this AC value to at least two significant...

With a motor powered by 60Hz, does the cap see 60 Hz? Is it a sine wave? If so I may be able to measure the cap value in circuit with a DVM, an ammeter and a simple calculation.

why would anyone put a 500v 2A fuse in series with a 250v 1A fuse in series with the common lead?

Would you say that, if the 120v on one side of the neutral connection increases by any amount, because of a sudden 120v load (let's say 10A) on the other side of the neutral, the neutral connection is necessarily bad (high resistance connection)?

how do I calculate how much force is necessary to prevent metal from expanding because of a temp. rise?

Anybody have hotkeys for these symbols? µ ? ? ? ² ³ ½ ? ? Thanks.

Anyone know of any?

How do I generate the lower case Greek letter "pi"? I managed to do all these symbols, but pi has me stumped. µ ? ? ? ² ³ ½ ? ? Thanks.

#14 AWG copper melts at 166A, but to calculate the I²T rating I need to know how many milliseconds it takes to melt at this current. I know there is a link to this info but I've lost it. Can anyone help?