CU Strip vs Stranded Conductor for Secondary Earthing

A Cu strip is more rigid - implies the earthing is correct and chances of it getting disconnected is much lower than the stranded conductor.

Rodents cant damage a flat cu strip as much as a stranded conductor. Cu strips are used where one needs to ensure proper earth values at all times.

Regards

Strip Copper is more solid; chances of mechanical damages are rare; whereas stranded or flexible copper is more vulnerable to mechanical damage & thus discontinuity of earthing connection. If I recall correctly, NEC/IEEE bans flexible earthing conductor if the phase conductor size is less than 10 sq.mm.

A flat conductor can carry a higher frequency current, which is common in lightning strikes, and severe short circuit conditions, due to skin effect.Electrons, being like charges, tend to repel each other, and are carried mainly on the surface of conductors.The higher the voltage, and frequency, the furthur they repel each other.The flat conductor can also dissipate more heat, and is mechanically more stable, so there are multiple reasons.

HTRN