Talk:EU

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Eu/t vs. Eu/s[edit]

What is the conversion between EU per tic and EU per second?

Quote.pngWell one second in minecraft got 20 ticks :3 so EU/t*20 = 1EU/sQuote.png
by Feanturi(''''')

Hello everyone. I'm just wondering if someone could explain to me the config options that let you modify EU generation. I'm looking to make Solar Panels a bit more efficient on my server. [EDIT: I've been able to get them to be LESS efficient by making the number 50, but when I set it above 100 it doesn't seem to do anything]--05:38, 8 February 2012 (CET)Freakytiki34

EU ~ electric charge Joule[edit]

EU is a measure of energy and is most similar to electric charge Joule IRL. EU/t is a measure of energy over time, and is most similar to electric current Watt IRL.

Cables are limited by EU/t, that's current limitation, NOT voltage limitation. However, cables can't handle being connected to a hi-power batbox, so its complicated.

(If I'm wrong here, let me know, I'm reading the wikipedia articles to better understand electric charge, potential, current Medicdude 02:27, 15 April 2012 (CEST)

In my opinion that's how EU was intended to work (EU = energy, either EU per tick or packets per tick = current, EU per packet = voltage), but cables don't work quite the way they do in real life. In real life, the voltage of a power supply doesn't have much impact on the thickness of the wire, but you need sufficient insulation for a given voltage to prevent arcs from burning through to nearby metal objects; the current of a power supply doesn't have much impact on insulation, but you need a thick (or better material) wire to carry a lot of current: the limitation is burning power as heat, and heat dissipation equals square of current times resistance, so lower resistance (better material or thicker cable) or lower current (which comes hand-in-hand with higher voltage via transformers) reduces heat loss. In IndustrialCraft, you need heavier-duty wires to carry higher voltages but not higher currents. Hawk777 21:58, 15 April 2012 (CEST)
Yes, thankyou for the info. I did a whole bunch of further research and brain crunching, and the closest cousin to EU-Packet strength is voltage, with the NUMBER of packets travelling through (NOT EU/t) most similar to current. The problem being that you can transmit multiple levels of 'voltage' through the wires in IC, so you can't really compare the two. I'm in the process of re-wording the voltage references across the wiki to refer to EUP, which I've also coined to mean the maximum packet rating a device or cable can handle. Medicdude 22:38, 15 April 2012 (CEST)
THANK YOU! This is a good small maintenance job to help reduce the confusion around these issues. Machine inputs and cable carrying capacity are EUP, not EU/t, as you've said. I agree that an EU is like a joule, an EU/t is like a watt, a packet is like a coulomb, a packet per tick is like an ampere, and an EUP is like a volt. Unit cancellation agrees across these parallels, though of course cable limits are on the wrong unit (at least it makes sense for machines, which have a maximum EUP input over which they will explode, where machines in real life will explode given too much voltage).