Short answer: wrong electrical product selection usually comes from missing voltage rating, conductor size, material, environment, standard, drawing interface or certificate requirement.
| Cable accessories | Wrong when voltage, core count, insulation diameter or indoor-outdoor environment does not match. |
|---|---|
| Cable lugs | Wrong when conductor material, palm hole, barrel size or crimping die does not match. |
| Surge arresters | Wrong when MCOV, grounding method, housing type or creepage distance is ignored. |
| Pole line hardware | Wrong when load rating, hole spacing, galvanizing or conductor interface is missing. |
| Grounding systems | Wrong when soil corrosion, rod material, coating thickness or connection method is not confirmed. |
A cheaper replacement should only be accepted when electrical rating, mechanical interface, material, standard and installation environment are all equivalent.