1. A partial rupture of the copper wire inside the plug wire is called a semi disconnection. When more than half of the current flow is disconnected, the power circuit suddenly decreases, leading to overload and high fever.2. When applying plug wires, be careful not to tie them up; Due to the difficulty in releasing the heat generated by the bundled plug power cord, the temperature rises and melts the plastic, resulting in a short circuit and fire of the copper wire.3. The plug wire should prevent being placed on top of the stove, as the high temperature of the stove will melt the plastic, causing the copper wire to short-circuit and catch fire.4. The plug wire should be applied under the allowable load capacity, and the power socket with a porous structure connected to the extension wire should be equipped with a leakage protector or overload protection device.5. Older or damaged plug wires can cause risks such as short circuits, power loss, or induced currents, and should be upgraded immediately.6. Is there heat or odor caused by the plug and cable in the application? This is an overload condition, and the high-power household appliance should be immediately stopped. Technical professional welders should be notified immediately for inspection.7. A simple optimization algorithm for determining whether a plug wire is a load: the sum of the required electrical power of the plug wire/power supply voltage, resulting in an estimated electrical flow rate, which should be lower than the short-circuit capacity of the power socket when compared to the short-circuit capacity of the power socket.
The general power plug can only be used by connecting the power cord. Depending on the purpose of the power plug, the power cord plug can be used for voltages of 250V, 125V, and 36V. The types of power cord plugs are mainly divided into conversion power plugs, injection molded power plugs, and installation and distribution power plugs. Below are the main uses of the three.Converting power plugs: The standards for power plugs vary in each country. For example, if a power plug from China is shipped to the United States, it cannot be used and a conversion plug must be required to complete the conversion. This requires switching the power plug. Converting a power plug is the process of converting a national standard plug into another national standard power plug.Injection molded power plug: Injection molded plug refers to a power plug that is pressed together with the wire through high temperature and pressure. Once formed, it cannot be disassembled. This type of power plug has obvious characteristics, stability, and safety. More than 80% of the commonly circulated power plugs in the market are of this type.Assembly power plug: Assembly plug refers to the process of fixing the power cord and plug together through screws, etc., but it can be installed and removed during use, ensuring the flexibility of the power plug. For example, a large proportion of the UK market is using this type of assembled power plug
MarkingLabeling is an important part of indicating proper installation, application, and maintenance for everyone, and is a crucial testing standard content to ensure personal safety and financial safety. Plug and socket products should be prominently marked with rated voltage, rated current, and switching power supply characteristics. In addition, converters (which refer to portable electrical accessories consisting of only one plug and one or more socket parts) should be marked with "MAX (or larger)" to indicate the rated voltage/or output power, in order to guide customers in preventing overload applications. The markings or symbols should be sturdy, durable, and clearly distinguishable. Do not apply silk screen ink or stone stickers that can be easily wiped off.Rated valueThe rated value is the main parameter for ensuring the normal, safe, and coordinated application of electrical equipment exchange between plugs, sockets, converters, and connected electrical equipment. For example, the rated voltage of the converter cannot exceed the rated value of a part of the plug. Otherwise, it will cause customers to choose electrical equipment based on the rated voltage of the socket, and the excessive current of the plug will become hot, causing risks; The rated value of the converter with circuit breaker and overload protection device should be equivalent to the rated value indicated on the circuit breaker and overload protection device. Otherwise, there will be product damage.SpecificationsSpecification is a key technical standard related to the safety application of plugs, sockets, and converters, and whether it considers universal interchangeability regulations to prevent accidental insertion. Improper specifications can harm customer applications or cause safety hazards such as poor contact or incorrect insertion. It can cause damage to machinery and equipment, or even fire and safety accidents.Prevention of electric shock maintenancePrevention of 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, and even in some unexpected situations. When the plug is connected to all or part of the ground socket, the induction power position of the plug should not be accessible; When any plug of the plug is in a touchable condition with other plugs, it should not be able to connect with the live plug sleeve of the socket. Plug sockets and converters with maintenance doors should be able to avoid single pole or probe insertion.structureThe plug-in components of the socket should have sufficient ductility to ensure sufficient contact pressure with the plug. The plug sleeve should be corrosion-resistant and wear-resistant to ensure excellent contact between the plug and the socket; The plug of the plug should be locked and cannot rotate, 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 resistance; When inserting and closing plugs and sockets, the middle of the surface layer should be firmly grounded to avoid causing safety accidents.The power plugThe power plug should have sufficient cross-sectional area to ensure that it is not prone to overheating and damage the insulation layer, resulting in short circuit faults, fire, and power loss, leading to 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 shall have sufficient impact toughness to withstand various mechanical equipment crustal stress caused by falling, impact, extrusion, etc. during the whole process of installation and application; Sockets with maintenance doors should be able to avoid single pole insertion.
Plug and cable types around the worldThe differences and applications of four commonly used plug wires1、 European plug cable① European plug: also known as Dutch standard power plug or pipe plugThe plug cable has dealer and dealer model specifications such as AW-006 JJ-002, and has been verified by countries around the world: (D (Netherlands); N (Denmark); S (Germany); VDE (France); FI (Germany); IMQ (Spain); KEMA (Spain); CEBEC (Denmark).Pin suffix: N/1225② Wiring signs indicate with code: H05VV □ □ F 3G 0.75mm2:H: Indicating European regulations and EU country logos05: Indicates the compressive strength of the wiring (03:300V 05:500V)VV: the insulation layer of the wire core on the surface of the front V, and the insulation layer of the protective wire sleeve on the rear V indicate the wiring. For example, if RR indicates the insulation layer of vulcanized rubber, if VV: N indicates the insulation layer of chloroprene rubber;□ □: The unique code in the front "□" indicates a flat wire, or H2 indicates a flat two core wire;F: Indicates that the line is a circular line3: Indicates the number of internal coresG: Indicate grounding device0.75 mm2: indicates the cross-sectional area of the wiringIndication of European standard line markings2、 British standard plug cable① Insert in English: 240V 50HZ, 3750V, 3S, 0.5mA, safety tube (2A 10A, 13A) (FVSE) → safety tube, specifications: total length 25-26.3mm, middle diameter 4.7-6.2mm, metal material cap diameter on both sides 6.25-6.5mm (screen printing ink BS1362);② The internal wire of its plug wire (when disassembling the BS power plug, it is facing the right side of itself to connect the L-wire (fire) to the safety tube, and the length of the grounding wire must exceed three times the length of the (fire line zero line, zero line). Loosen the fixed screw and use external force to pull it out to remove the wire. The fixed screw that fixes the three fixed wires must be conical.).③ Identification is the same as European plug wires.3、 American plug cable① American plug wires: 120V 50/60HZ are divided into two core wires, three core wires, and optical rotation and non polarity. The metal sheets of plug wires to the United States must have plastic sleeves;The root line of the two core wire hot stamping indicates the zero line of the hot wire; The large pin of the optical power plug is the zero wire, and the small pin is the live wire zero wire (the convex and concave surface of the power wire is zero, and the round surface of the wire is the live wire zero wire);② American power cord types: NISPT-2 two-layer insulated flat wire, SPT-1W single-sided insulated flat wire with concave groove, SJTW moisture-proof power cord, SJTO oil-resistant power cord, etcAmerican power cord power plugNISPT-2: NISPT indicates two layers of insulation, with -2 surface layers of two core wire core insulation and surface layers of insulation;XTV and SPT: indicate a single-sided insulation layer, with a -2 surface layer of two core wires (the entire wire has a concave groove, and the surface insulation is immediately wrapped with a copper core electrical conductor);SPT-3: indicates a single sided insulated grounding wire, -3 indicates a three core wire (with a concave groove in the entire wire, and the middle is the grounding wire with two layers of insulation);SPT and NISPT are both offset wires, while SVT has two layers of insulation for circular wires. Core insulation surface insulation③ The verification serial number of American plugs is generally not immediately marked with UL pattern design on the top of the plug. For example: E233157 E236618④ American plug cables are different from European plug cables:European plug wires are indicated by "H";The number of lines used in the US regulations is indicated as follows: 2 × 1.31mm2（16AWG）、2 × 0.824mm2 (18AWG): VW-1 (or HPN) 60 ℃ (or 105 ℃) 300V2: Indicate the total number of wire cores;1.31 or 0.824 mm2: indicates the cross-sectional area of the wire core;16AWG: indicates the cross-sectional area of the wire core, and mm2 is relative to the above;VW-1 or HPN: VW-1 is PVC material; HPN: Neoprene material60 ℃ or 150 ℃ is the high temperature resistance level of the power cord;300V: The compressive strength of the power cord is different from that of the European standard (indicated by 03 or 05 in the European standard).4、 Japanese plug cable: PSE, JETVFF 2*0.75mm2 -F-① VFF: V indicates that the wire material is PVC; FF is a single sided insulation layer with concave grooves for the entire line;② VCTFK: PVC surface wire material; TFK is a two-layer insulation layer flat wire, with a surface insulation layer, an inner insulation layer, and a copper core transmission line;③ VCTF: VC indicates that the wire material is PVC; TF is a two-layer insulated circular wire;④ There are two types of wiring: one is 3 × 0.75mm2, another type is 2 × 0.75mm2three × 0.75mm2:3 indicates a three core wire; 0.75mm2 indicates the cross-sectional area of the wire core;⑤ F: indicates the material of the flexible cable;⑥ The Japanese triple plug plug has two springs, and the grounding wire is immediately locked onto the power socket (with good safety and convenience).
