Class F applications have higher protection requirements (leakage current); B stands for body; C stands for heart.
Class B equipment: equipment with certain electric shock protection. Leakage current is allowed to protect the reliability of grounding connection.
Type B: Type B equipment is equipped with type F application equipment. A current test in which the allowable leakage value is increased by an external additional voltage.
Cf type: especially in the equipment with allowable leakage current value and F type application part, the electric shock protection is higher than bf type.
Extended data:
Importance of click protection:
Electric shock is a pathophysiological effect caused by current passing through human body. When the current passing through a certain part of human body exceeds 30 mA, if the current is not cut off in a short time, people will be in a very dangerous situation.
Personal electric shock prevention in low-voltage electrical equipment must meet the requirements of relevant national standards, regulations, installation procedures, official guidelines and general rules. The relevant IEC standards are: IEC 60364 and IEC 60479 series standards and IEC 6 1008, 6 1009 and IEC 60479-2 standards.
When current passes through the human body, it mainly affects the muscles, blood circulation and respiratory function of the human body, and sometimes causes serious burns. The degree of harm to human body is related to the magnitude of current, the position of current passing through human body and the duration of current.
National standard full-text publishing system-standard number: GB 9706. 1-2007