If the lines are the correct length and angle and all ends meet the end of the next line why worry about the grid?
If they are to grid snap, then if you have 5 lines runing thru a dwg, they all are uniformly spaced when matched up to electrical terminals as well as other wires that are space to the grid, they match up without stretching etc. THEN, when you has to swap out equipment at a later date and you bring in one of your many blocks that are drawn to snap, you can just drop it in with a minimum of dwg modifications. - SPEED.
Since I put our company on the 'snap train' and put all of our blocks to snap, our dwg time has greatly decreased. Our dwgs look pretty much the same, no matter who drew them.
When I first started here there were no CAD standards. You could tell who drew a particular dwg by how the dwg looked.
Now our dwgs all look uniform and very professional. More importantly, Our CAD time has been greatly cut. And we all know that time is money.
craigr