Cov neeg yuav khoom lawv tus kheej yog kev siab hlob rau cov nqi pheej yig thiab yuav cov motors ntawm cov neeg tsis zoo lossis lub cev muaj zog uas tsis tau ua rau tooj liab nkaus xwb.

Cov neeg siv khoom ua rau cov motors ua haujlwm nyob rau hauv overload.

Lub zos voltage ntawm cov qhua tuaj noj mov qhov chaw qis dhau los yog tsis khov.

Cov laj thawj xws li cov neeg siv hluav taws xob hluav taws xob hnyav dhau.

Cov neeg siv khoom tsis xyuam xim rau kev tiv thaiv.