1. EAD - to create assembly between electrical parts. Let's say you have a plug and a socket, you could connect them together using electrical properties.
2. EPD - to create electrified part. For example the connectors that you are probably using from a library, are electrified with EPD.
You cannot properly link bundles to not electrified parts.
Above two only to be used only if you are creating the library with connectors for example.
5. EWR - it is possible to define individual wires between connectors.
I'm using it only for checking of the network, if all connected properly to connectors.
Using a local tool, it is used to compute bundle diameter based on diameter for each individual wire.
6. EHF - it should be clear, it is used to flatten the bundle for manufacturing
99% I'm using only EHA and EHI but I'm interested only in the mechanical part of a bundle
