There are many power adapter specifications, safety regulations that safety norms, in the specification of the equipment products and electronic components have a clear statement and guidance to avoid poor design or improper use of a casualty has occurred; in turn can cause life, property loss. Therefore, most countries have developed their own safety regulations. Also, because the differences in national geography and voltage safety norms not identical.

General requirements for safety: the protection against electric shock, fire, radiation hazard, high temperature hazard, chemical hazards, mechanical hazards.