There is a new version of IndustrialCraft called IC² which supports minecraft version 1.7.10. This means that it wont work with the newest version of Minecraft, but if you have an earlier installation of Minecraft version 1.7.10 or older, you can install it following this link which leads to the latest stable version.
However, the most popular and easiest way to play (and the way i would recommend doing it) is by installing a modpack-launcher, with the most popular right now being Feed-The-Beast or ATLauncher, where you get a bunch of different modpacks consisting of different mods made to fit together. There you can surely find a tech-modpack with IC² included. If you just want pure IC², in atleast ATLauncher (FTB needs to be confirmed) have the option to only include it and no other mods. Just follow link below to either ATL or FTB.