The game can hardly be played without using electricity.
Factorio electric motor blueprint.
You should construct on a 14 14 tiles grid at the start.
Every machine has its own internal electric capacity.
When a blueprint is placed a ghost of the layout appears on the ground.
The electric system is used to power a lot of different machines.
You can easily optimize it by rotating the electrical engine factories so that the liquid can be inserted without forking.
An electric engine unit is the advanced counterpart of the engine unit and is used in some higher end recipes.
Blueprints are used to copy paste parts of a factory.
Note that lubricant requires a chemical plant to be created and engine units require assembling machines so electric engines cannot be built by hand from raw materials.
By doing this you can put the electric engine factories one tile closer to the middle.
This can be used as a guide for manually placing factory pieces or more commonly handed over to construction robots for automated completion.
Engine units must be built using an assembling machine and cannot be made by hand.
Blueprints are items that contain building layouts.
An b engine unit b is used for building various vehicles such as trains and cars.