This is my first question here; if its not good enough, please let me know. Thanks
For underground cables, we can choose "concentric neutral cable" or "tape shielded cable".
For the first one, it contains 1/3rd sized neutral or full size neutral.
According to the following website:
- 1/3rd sized neutral is used for three phase supply.
- full sized neutral is used for single phase supply.
What is the difference of the structure between them?
Sorry, I do not see a full explanation on website as far as I can find.