What are the elements that pose a risk to the safety factor of power cord plugs

Marking

Labeling is an important part of indicating proper installation, application, and maintenance, and is a crucial testing standard content to ensure personal and financial safety. Plug and socket products should be prominently labeled with rated voltage, rated current, switch power characteristics, etc. In addition, converters (which refer to portable electrical accessories consisting of only one plug and one or several sockets) should be marked with "MAX (or larger)" to indicate the rated voltage and/or output power, in order to provide specific guidance for customers to prevent overload applications. Signs or symbols should be sturdy, durable, and clearly recognizable. The marking of silk screen ink mountain stone stickers that cannot be easily wiped off should not be applied.

Rated value

The rated value is the main parameter for ensuring the normal, safe, and coordinated application of plugs, sockets, converters, and connected electrical equipment. It is the basis for the exchange and coordination of electrical equipment. For example, the rated voltage of the converter cannot exceed the rated value of a part of the plug. Otherwise, it will result in customers selecting electrical appliances based on the rated voltage of the socket, causing the plug to overheat and pose a risk; The underrated value of converters with circuit breakers and overload protection devices should be equivalent to the rated value indicated on the circuit breakers and overload protection devices. Otherwise, there will be damage to the product.

Specifications

Specification is a key technical standard related to the safe application of plugs, sockets, and converters, and whether universal interchangeability regulations are considered to prevent accidental insertion. Poor specifications can pose safety hazards such as endangering customer applications or causing poor contact, accidental insertion, etc., ranging from minor damage to machinery and equipment to serious fire and safety accidents.

Prevent electric shock maintenance

Preventing electric shock maintenance is an important safety indicator value to ensure that plugs, sockets, and converters are not prone to safety accidents for customers and others under all normal application conditions, even in some unexpected situations. When the plug and socket are fully or partially connected to the ground socket, the sensing position of the plug should not be accessible; When any plug of the plug is in a touchable position with other plugs, it should not be able to be plugged into the live socket of the socket. Plug sockets and converters with maintenance doors should be able to avoid single pole or probe insertion.

structure

The socket sleeve components need to have sufficient ductility to ensure sufficient contact pressure on the plug. The socket should be corrosion-resistant and wear-resistant to ensure excellent contact between the plug and the socket when inserted together; The plug of the plug should be locked and cannot be turned, otherwise it will endanger the insertion characteristics and cause unsafe factors; The converter has a copper wire positioning device to ensure that the copper wire is fixed and can withstand all normal tensile and torque forces; When the plug and socket are plugged in, the middle of the surface should be firmly grounded to avoid safety accidents.

The power plug

The power plug needs to have sufficient cross-section to ensure that it is not easily heated, causing insulation damage and resulting in short circuit faults, fires, power outages, and safety accidents. For example, the cross-sectional area of the power plug for a typical 250V, 10A converter should be greater than or equal to 0.75mm2.

impact toughness

The plug and socket should have sufficient impact toughness to withstand various mechanical equipment stresses caused by falling, impact, extrusion molding, etc. during installation and application; The socket with maintenance door should be able to avoid single pole insertion.