We often see the colors of the three wires in the three-conductor plug line are not the same, what is the function of the three lines? Is the American mark line the same as the national line?
For three cores
L pole: It is the fire line.
Common core color: black or brown (some companies called brown, brown), the US standard sundries commonly used in these two colors, the European standard with brown (brown, brown)
N pole: the zero line.
Common core colors: white, red, light blue. American regulations are commonly used in these three colors, European regulations use light blue
E pole: grounding line.
Common core color: green or yellow among green (some companies call yellow green or green yellow, yellow-green), the United States and Japan regulations are commonly used in these two colors, many companies use green yellow.
When we buy power cables and cables, we can often see the power cables and cables printed with letters such as RVVP and RVV that start with some English letters. Many people have made clear what they mean. In fact, they respectively represent the power cord, cable models and uses, the following we explain to you about the use of several common wire and cable representation.
Various cable functions
RVV: (227IEC52/53) PVC insulated flexible cable (cross-sectional area: 0.5-6.0 core number 1-24)
Uses: power lines, signal lines, household appliances, small power tools, instruments and power lighting. As long as the specification line complies with the national standard, the price is not much different, but there is no lack of useful impurities on the market, copper is not enough, a small diameter, a short number of meters, straight (core wire is not twisted or core wire is not twisted, so that the tensile strength is greatly reduced, Resistance increases) to charge. Derivative Model: RVVS: The twisted pitch of this type of core cord is generally used in broadcast systems.
RVVP: copper core PVC insulated shielded PVC sheathed flexible cable, voltage 300V/300V2-24 core. The main quality indicators: wire diameter (including core wire and braided wire, not as thick as possible, with impurity copper to achieve the resistance standard and do very rough), copper core purity, weaving density, lay length. Uses: instruments, meters, intercom, monitoring, control installation.
RVS and RVB are suitable for power cables for household appliances, small power tools, instruments, meters, and power lighting connections. RVS can also be used for broadcast lines or in place of RVV cables. RVB can replace the gold and silver wire when the demand is not high.
RG: Physically foamed polyethylene insulated access network cables are used to transmit data analog signals in a coaxial fiber hybrid network (HFC). This is an American standard and is approximately equivalent to the national standard SYWV series. The main quality indicators: copper wire diameter, insulation thickness, braided material (the market is mostly aluminum-magnesia wire braided, good quality should use tin-plated copper), weaving density.
UTP: LAN cable uses: transmission of telephones, computer data, fire protection, security systems, intelligent building information network. The commonly used UTPCAT5, UTPCAT5E shielded model is STP.
KVVP: PVC sheathed braided shielded cable Uses: Signal transmission, control, and measurement of electrical appliances, meters, and power distribution devices.
AVVR: PVC sheathed flexible cable (cross-sectional area: 0.12-0.5 number of cores 1-24) Uses: Signal, control. Such as access control signals, control, PTZ control, etc.
RV, RVP PVC insulated cables, PVC shielded cables, mainly used for equipment.
BV, BVR polyvinyl chloride insulated cable uses: suitable for electrical instrumentation equipment and power lighting fixed wiring, affordable low resistance. In many occasions to connect the power can be more considerate.
RIB: Speaker Cables (Fever Lines, Gold and Silver Cables) Some models of audio cables are marked with the words “6N†and “7Nâ€. The meaning is used to indicate the purity of the fever lines made of metal materials. For example, "99.9999%" can be expressed as "6N", which means that the purity is 6-9. The larger the number in front of N, the higher the purity of the audio line. Whether home theater audio equipment requires the use of higher-quality audio cables, the key is to grasp the principle of seeking truth from facts and doing what it can. For the generally popular type (less than 10,000 yuan) audio equipment does not need to deliberately pursue the high quality of the wire, as long as the copper core signal line with a larger general cross-section can be used. For better home theater audio equipment, consider using high-quality audio cables.
HYV, HYA data communication cable (indoor and outdoor) (core diameter 0.5mm, core number 2, 4, 8, etc.) is a telephone line for connection of telephone communication and radio equipment and distribution box for telephone distribution network Wiring and so on. In the market, the average core wire diameter is 0.4mm, and there is also a difference in wire or copper-aluminum alloy. Another common lack of telephone lines.
SYWV (Y), SYKV Cable TV, Broadband Network Specialized Cable Structure: (Coaxial Cable) Single Oxygen-Free Round Copper Wire + Physical Foamed Polyethylene (Insulation) + (Tinned Wire + Aluminum) + PVC (Poly) Ethylene) (equivalent to American Standard RG-6, RG-59). Nowadays, aluminum magnesium wire is used in the market to weave (which cannot be welded and easily oxidized). The core wire is made of copper clad aluminum or copper clad steel. Many people think that the SYWV wire is cheaper than the SYV wire, but in fact it is not the case.
Power line current limit (cross-sectional area) in various countries
Remarks:
1. There is no heat-resistant plastic mixture such as a natural rubber mixture.
2. A heat-resistant plastic mixture such as a resin butadiene rubber mixture.
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