Items and machines in IndustrialCraft 2 are grouped into tiers. An item or machines tier is based on the maximum EU it can output or recieve per tick (EU/t).
Tier 0 machines run on micro-voltage. Micro voltage is 0-8 EU. There is no need for voltages this low, as the basic machines accept up to 32 EU/t, nor is there a transformer for this voltage level.
Tier 1 machines run on low voltage, or 9-32 EU. Most basic machines are tier 1.
Tier 1 Items
- Tin Cable
- BatBox (Chargepad)
- RE Battery (Charging)
- Electric Furnace
- Metal Former
Tier 2 machines run on medium voltage, or 33-128 EU.
Tier 2 Items
Tier 3 machines run on high voltage, or 129-512 EU.
Tier 3 Items
Tier 4 machines run on extreme voltage, or 513-2048 EU.
Tier 4 Items
Tier 5 machines run on "insane" voltage, or 2049-8192 EU.