Board Thread:Questions and Answers/@comment-87.115.33.27-20130429191144/@comment-1757231-20130629073730

It depends on what you use:

If you're low-game, Tesla Coils may be a little expensive. Try using uninsulated HV Cables, as A Wikia Contributor kindly said, or any other type of cable. Run the power through it, and it should work. Though, it isn't really effective. 1-2 hearts at most, and can be easily prevented.

If you CAN make a Tesla Coil, do it! They are way more effective, as it is their purpose. Try concealing it underground. It uses power like most IC2 Machines: Cable power to it.

NinjaJake86, the reason it didn't work could attribute to a few things.

1.No power was running through it.

2.You were in Creative (most likely). You don't take damage: the red flashing effect doesn't occur either

3.Too far away- cables have a length of electrocution!

4.Too awesome armor- Most high-tier armor negates this effect.