Cable grouping factor - Space on ladder for no groupping

Good morning everyone.

If I may ask the more experienced members here...

I have a ladder with various submains departing from a Main Switchboard.

Is there any distance I could leave between a specific submain cable and the rest of the cables on the ladder (left and right) that allows me to get away from any grouping factor for this specific cable?

For example something like twice the external diameter of the cable left and right of the cable?

(Just an example)

Thanks