Key points in this article
Installed is not enough
A grounding wire can be present yet ineffective. Real protection is shown by a test, not by the sight of a cable. Measure continuity and resistance under the right condition, and confirm the path reaches true earth. A number, not a glance, proves the effect.
Recheck after change
Any site modification, a new pile or moved cable, can disturb grounding. Test again afterward; never carry the old assumption forward. Grounding is the quiet guard against shock during a fault. Its failure is rare but severe, so verification is non negotiable.
Field rule
Dongshang New Energy retests grounding after every relevant change, because an unverified ground is no ground at all. Real protection is shown by a test, not by the sight of a cable, so measure and confirm the path reaches true earth. An unverified ground is no ground at all. Recheck it after any nearby work, because the old assumption is exactly what kills people when it quietly fails.