Direct Buried cables within a controlled area and what constitutes mechanical protection

Some thoughts:

Disconnecting the inverter will not reduce the current flow in the event of a cable short circuit in the buried section...I think Mike was asking whether there are disconnectors on the array side of the buried cables so they can be isolated from the source of supply. If not there might be issues - and indeed danger if done wrong - dealing with any faults that may arise. String connectors ("MC4"s) are not for on-load disconnection and may be damaged if so used. This isn't of course specific to this particular install but does affect the risk assessment.

How have the string cables been laid? Are pos and neg run separately or have they laid in pairs? Are the cables laid flat or bunched?

Do take a good look at the cable specs. Are they proof from damp and might there be issues with low IR causing startup trouble? The subarray size, DC operating voltage and AC arrangement might all affect this.

What protection is there from rodents, badgers and the like?

Might maintenance vehicles / tractors drive over the cable route (PV maintenance is generally in the winter because that's when the array won't be generating so much, so the ruts can get quite deep if its a "main" route, particularly where the ground is soft over a cable trench)?

What about mechanical damage from groundsmen strimming (or sheep), at the transition from under- to above ground?

Some thoughts:

Disconnecting the inverter will not reduce the current flow in the event of a cable short circuit in the buried section...I think Mike was asking whether there are disconnectors on the array side of the buried cables so they can be isolated from the source of supply. If not there might be issues - and indeed danger if done wrong - dealing with any faults that may arise. String connectors ("MC4"s) are not for on-load disconnection and may be damaged if so used. This isn't of course specific to this particular install but does affect the risk assessment.

How have the string cables been laid? Are pos and neg run separately or have they laid in pairs? Are the cables laid flat or bunched?

Do take a good look at the cable specs. Are they proof from damp and might there be issues with low IR causing startup trouble? The subarray size, DC operating voltage and AC arrangement might all affect this.

What protection is there from rodents, badgers and the like?

Might maintenance vehicles / tractors drive over the cable route (PV maintenance is generally in the winter because that's when the array won't be generating so much, so the ruts can get quite deep if its a "main" route, particularly where the ground is soft over a cable trench)?

What about mechanical damage from groundsmen strimming (or sheep), at the transition from under- to above ground?