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The current carrying capacity of the wire and cable refers to the amount of current carried by the line conductor. During the use of the wire and cable, the maximum current required by the load must be less than the long-term allowable current carrying capacity of the wire in the air. So, what are the specific factors that affect the current carrying capacity of wires and cables? Guangdong Rifeng Cable Co. Ltd

1. Core area
   Under normal circumstances, the core area (cross-sectional area of ​​the wire) is proportional to the current-carrying capacity, that is, the larger the core area, the greater the current-carrying capacity.
2. Conductor material
   The current carrying capacity of different materials under the same conditions: silver>copper>aluminum. If copper wire is used to replace aluminum wire, the current carrying capacity can be increased by 20%-30% under the same specifications.
3. Insulation material
   The temperature resistance of commonly used insulating materials is polyvinyl chloride: 70°C, cross-linked polyethylene: 90°C, and polyolefin material: 150°C. The use of insulating materials with good high temperature resistance and thermal conductivity can increase the current carrying capacity of the cable.
4. Contact resistance
   The smaller the resistance coefficient of the cable, the larger the allowable current-carrying capacity. Therefore, soldering, soldering, and crimping can be considered when bonding wire ends to reduce contact resistance.
5. Cable spacing
   When multiple wires are laid in parallel, the proximity effect and skin effect will be formed, so that the electric charge is concentrated in the part of the wire cross section and the allowable current carrying capacity of the wire is reduced. In addition, applying multiple strips will cause heat accumulation, which will also reduce the current-carrying capacity.
6. Ambient temperature
   The greater the thermal resistance around the cable, the worse the heat dissipation and the smaller the current carrying capacity.

RIFENG LIGHTING TECHNOLOGY CABLES H07V-K/R/U
Started in 2009, Guangdong Rifeng Cable Co. Ltd
is specialized in research and development, design, manufacturing and sales of rubber-sheathed cables as core products. Its products have been used widely in air conditioning, home appliances, wind power generation, new energy, high-end equipment manufacturing, building machinery, port machinery, petrochemical industry, marine engineering, vehicles and vessels, robot and power-driven tools. Rifeng currently has facilities of more than 200,000 sq. meters . It has more than 30 patents granted by the state and been successfully listed at Shenzhen Stock Exchange under the code 002953 on May 9th, 2019.

Product Certification:
CCC
Basic Parameters：
Rated Voltag:
450/750V
Rated The Working Temperature:
70℃
Executive Standard:
EN 50525-2-31
Conductor Structure：

Conductor Material：
Type 5/2/1Bare Stranded Copper
Insulation Material:
PVC
Product Properties：
1. The V0 Grade high insulation material is adopted to prevent flame and ensure safety;
2. The brand new highly insulating material is adopted to prevent electric leakage and ensure safety;
3. The brand new anti-aging material is adopted to prolong the service life and improve safety;
Application：
The cables are used as electrical connected line or wiring in power installation, household appliances, electrically operated tools, onstruction lighting and machines inner rated voltage A.C 450/750V or below.

RIFENG 60227IEC 56(RVV-90) CABLES

Started in 2009, Guangdong Rifeng Cable Co. Ltd
is specialized in research and development, design, manufacturing and sales of rubber-sheathed cables as core products. Its products have been used widely in air conditioning, home appliances, wind power generation, new energy, high-end equipment manufacturing, building machinery, port machinery, petrochemical industry, marine engineering, vehicles and vessels, robot and power-driven tools. Rifeng currently has facilities of more than 200,000 sq. meters . It has more than 30 patents granted by the state and been successfully listed at Shenzhen Stock Exchange under the code 002953 on May 9th, 2019.

Product Certification: CCC

Basic Parameters：
Rated Voltag: 300/300V
Rated The Working Temperature: 70℃
Executive Standard: GB/T 5023
Conductor Structure：

Conductor Material： Bare Stranded Copper
Insulation Material: PVC
Jacket Material： PVC

Product Properties：
1. High conductivity;
2. High electric insulation performance;
3. The cable is flexible and has excellent bending resistance;
4. It is of anti-interference capability, and can ensure effective and safe transmission of data.
Application：
The cables are used as electrical connected line in power installation, household appliances, electrically operated tools rated
voltage A.C 300/300V or below.

The US dollar fell further against the basket of major currencies on Wednesday, pressured by weaker than expected US PMI data.To get more news about WikiFX, you can visit wikifx.com official website.
　　Although the US factory activity index rose to record high in June, Services PMI dropped significantly (June 64.8 vs May 70.4 and 70.0 f/c) and Composite PMI which tracks the activity of both sectors and indicates the health of the economy, fell from Mays peak at 68.7 to 63.9 in June.
　　The dollar index holds firmly in red for the third straight day and retraced over Fibo 38.2% of post-Fed strong bullish acceleration, as today‘s fresh bearish extension penetrated thick falling daily cloud (spanned between 91.55 and 90.51) and cracked 200DMA (91.49) questioning Fed-induced dollar’s short squeeze.
　　In addition, upbeat EU PMI data for June inflated the single currency, and increased bearish pressure on greenback.
　　Fading bullish momentum on daily chart warns of further weakness, but fresh bears need a daily close below 200DMA to confirm negative signal.
　　Caution on strong headwinds bears may face from strong supports provided by daily cloud and 200DMA that would contain the pullback and sideline immediate downside risk.

Numerous traders endlessly fight for opportunities that they are afraid of missing in the forex market, vacillating over financial products and continuously shifting to different time periods. Unfortunately, their accounts can only see the plummet as time goes on instead of the progress in line with their hardworking.To get more news about Inflation, you can visit wikifx.com official website.
　　This refers to trading frequently, or so-called diligence, a typical bad habit of investors, which isnt the foundation for being rich. The more times you enter the market, the more risks you have to face!
　　The winning rate that seems to be 50% at the beginning can be reduced dramatically by the irrational, capricious decision of conducting transactions.
　　In addition to hefty commissions triggered by trading frequently, traders lacking rational thinking may only focus on gaining profits and fully forget to contemplate consequences caused by failure.
　　Therefore, how can we prevent ourselves from trading frequently？ The answer is setting strict restrictions on the number of your transactions. Some may wonder whether the inaction on the signals of market entry breaches the rule of trading based on the unity of knowing and doing.
　　Of course not. The forex market is changeable, leading to a situation where the winning rate of signals can vary according to different time points, fundamentals, and other factors. Rigorously restraining the number of transactions can phase out unclear signals and improve the quality of trading.
　　As trading opportunities are infinite, please dont pay too much attention to how many you can seize at the moment. The higher the threshold for trading is, the fewer the number of transactions will be. In this way, your forex trading can be smoother!
　　Download WikiFX to get lessons from experts who have traded forex for over 20 years. (bit.ly/wikifxIN)

Nationwide lockdowns, shortages of medical supplies and other important products, and interruptions in normal supply chain operations have many traders, both new and experienced, scrambling to adjust their trading strategies during the pandemic.To get more news about Gold Price, you can visit wikifx.com official website.
　　Making solid forecasts for opening positions, targeting which markets to focus on, and determining what news to believe and act on has all become extremely problematic during the crisis. Making matters worse is the threat of a “second wave” once many countries end their quarantines and try to return to normal.
　　Nobody wants to downplay the seriousness of the Covid 19 crises and the subsequent consequences. However, as traders we need to find a way to turn a bad situation into a profitable one in order to maintain our livelihoods and reach our financial goals.
　　To that end, here are some strategies we have put together on ways to trade profitably by identifying which markets are being affected in regards to developments in the pandemic.
Filter Your News
　　News about the Coronavirus, Covid 19, and other related terms is not equal. We have all heard the term “fake news” enough in recent years to understand that not all information that we get is accurate. However, and more importantly, it is best to also understand that some news matters much more than others when it comes to trading during the pandemic.
　　While we might be interested locally in live advisories of the coronavirus in India, Russia, or whatever locale we live in, the stark reality is that markets dont really care about most of these geos. The two most important areas to watch in regards to news are the United States and China with the EU, Japan, and South Korea a ways behind them.
　　Here are some sources that will definitely have an impact on markets when releasing information about the spread of the Covid 19 virus, mortality rates, concerns, and even optimism:
　　1. The World Health Organization (WHO) — Despite the spectacular failures of this organization before and during the pandemic, when they make announcements, markets listen.
　　2. The Center for Disease Control (CDC) in the U.S. — Also riddled with controversy with their response, but U.S. economic policy regarding the pandemic is directly tied to the numbers and info produced by this organization.
　　3. Any OFFICIAL Chinese government announcement of negative virus news in the country. If the news is bad enough that the Chinese government will actually admit it, then it is worth noting.
　　Don‘t buy into Western media’s allegations about how many infected people there are in China. While it may be true, it doesnt matter to markets.
　　4. Official agreements announced by OPEC+ regarding limits on production amongst its members. More on this in the next section.
Economic “engines” form the support of general economic well-being. Experienced traders know this, which is why they monitor their Economic Calendars year round regardless of the Covid 19 issue. However, it is even more important to keep an eye on this small list of indicators to give you an edge in trading during the pandemic and as the world transitions back towards normality.
　　1. Oil storage levels. Oil is the key ingredient in the world economy. Every week, the U.S. announces their current crude oil inventories. This is important news because the U.S. is the largest consumer of oil in the world and China is second.
　　If inventories are increasing or staying the same, it means the U.S. industrial and consumer machine isnt improving and that means less sales in EVERYTHING and not just oil.
　　2. Chinese manufacturing data. If the U.S. is buying it, a large chunk of it is being made in China. China needs resources to produce, but won‘t produce if the U.S. isn’t buying.
　　Its a symbiotic relationship but often one or the other increases first. It is very possible that China will restart its economic engine before the U.S.
　　3. U.S. employment data. The single largest hit to the world economy is the lack of employment for millions of American consumers. When they buy less, the world makes less.

It‘s important to take the emotion out of your investing decisions. And that’s a great starting point for a conversation about investing in precious metals.To get more news about WikiFX, you can visit wikifx.com official website.
　　Theres a lot of emotion about equities in 2021. Is inflation really a problem？ If so, will the Federal Reserve raise interest rates sooner than expected？ What bubbles have deflated？ What bubbles are only now forming？
　　Trying to divine the answers to these and other questions is the cause of many poor investment decisions. While you may believe you‘re being reactive, you’re in fact reacting to what you think (or fear) is going to happen.
　　And thats why precious metals warrant a place in your portfolio. The idea behind precious metals is that they generally have a low correlation with the stock market. And, in times of market volatility, precious metals like gold and silver tend to hold their value very well.
　　However, as rational as those reasons sound, investing in precious metals is a source of debate among many investors. Some investors have a large amount of their portfolio in precious metals. Other investors believe precious metals have no place in any portfolio.
　　Were not advocating for one extreme of the other. We are saying that precious metals merit at least a small position in most portfolios. The purpose of this article is to give you a few practical strategies to get you started in precious metals.
What Are Precious Metals？
　　As a primer, precious metals are rare metals that have a high economic value. This high value is based on factors like scarcity, high demand in industrial processes, and their function as a store of value. For investing purposes, the four most common precious metals are gold, silver, platinum, and palladium.
How To Invest In Precious Metals
　　Buy the Physical Metal - For the uninitiated, yes this is exactly what it means. Buying gold or silver coins, bars, etc. This gives you a physical asset you own outside of the traditional financial system. And it takes away the counterparty risk of investing. This simply means that other investments are subject to the risk of another party failing to meet their obligations.
　　Buying the physical metal requires a good understanding of what the current spot price for the metal is at the time of purchase. Paying too high of a premium for the physical metal can make it difficult to get your initial investment back.
　　Invest in a Precious Metals Exchange-Traded Fund (ETF) - Buying physical metal has limitations. One of which is that investors need a way to store the metals. This makes exchange-traded funds (ETFs) an attractive option. The primary advantage to investing in precious metals via an ETF is liquidity. Simply put, you can buy and sell shares through your brokerage account. Its convenient and generally less expensive.
　　However, a disadvantage to investing in precious metals through an ETF is that you dont own the physical metal and you have no claim to the physical metal owned by the fund.
　　Buy Shares of Mining Stocks – A third option is to buy shares of companies that are involved in the mining of precious metals. This is a “picks and shovels” way to invest in precious metals. However, like investing in an ETF, you are not taking ownership in the physical metal.
Options trading has become extremely popular with retail investors. And precious metals are no exception. However, as with all options trading, the reward of an outsize gain must be weighed against the possibility that you could lose your entire investment, which goes against the entire premise of investing in precious metals.
Limitations Of Investing In Precious Metals
　　There are two primary limitations that investors need to consider when investing in precious metals. The first is that precious metals are commodities. And that means you‘re buying them at one moment in time with the expectation that you can sell them for a higher price in the future. And while they do tend to hold their long-term value against inflation, they don’t produce any cash flow (like many growth stocks) or interest (like bonds).
　　The other limitation is transaction costs. When you buy precious metals, the company buying the metal at wholesale prices will make a profit by selling it at retail prices. Investors may also incur shipping costs. Plus, there will be costs associated with storing metals.

10種被證明是天然壯陽劑的食物

一口又粘又好吃的東西會立刻提升你的性欲，這是很誘人的想法，但是有科學來支持這一說法嗎？答案並不是那麼簡單，因為當涉及到真正的整體健康時，答案很少如此簡單。To get more news about 日本藤素正品, you can visit homll.com official website.

最重要的是，那些被證明有壯陽作用的食物是飲食的一部分，有助於健康的血液迴圈，可以幫助平衡荷爾蒙，增强活力，所有這些都是新增性欲所必需的。食物中蘊含的能量，它的文化遺產和儀式關聯，以及食物的氣味、質地、形狀和顏色都能觸發喚醒，記住大腦是身體最大和最有力的性器官。

儘管如此，肉感的食物還是很有趣的，無論是單獨享用還是與伴侶一起享用。接下來，兩位營養專家將對10種被證明是天然壯陽藥的食物進行稱重，超級食品營養素能給人帶來一種衝擊。

巧克力

在古代中美洲，瑪雅人和阿茲特克人相信可哥是眾神的食物，並將其用於儀式中，因為據說可哥與血禮有關。《紐約時報》的一篇文章稱，被稱為偉大征服者的阿茲特克皇帝蒙特祖馬（Montezuma）用巧克力“為他的浪漫約會提供燃料”。文章還指出，阿茲特克人可能是有記錄以來第一個將巧克力作為壯陽藥的人，將其與性能力和增强性欲聯系起來。

瑪卡

說到超級食品，原產於秘魯山脈高海拔地區的植物瑪卡（maca）最為人所知的是一種動力粉，它能提供不緊張的能量提升。但瑪咖也是一種被證實的壯陽藥，已經有幾個世紀了。”能量方面，maca被認為有助於平衡太陽神經叢脈輪，它控制自信和個人力量，以及骶骨脈輪，它控制性和創造性能量。她還指出了兩項研究表明maca作為性增強劑的功效瑪卡幾千年來一直被秘魯人用於能源和生育，”她說，並提到了國家衛生研究院（NIH）2012年發表的一項研究。同一項研究表明，maca可以新增精子數量，並對精子運動產生積極影響。

利弗莫爾紅胡桃

理查茲指出，科學家們還發現核桃可以“改善勃起功能障礙”，他補充說，為了達到最佳效果，最好每天攝入60克或更多的核桃（相當於兩大手）。利弗莫爾核桃，也被稱為血核桃，其驚人的猩紅顏色，是專業堅果，意味著作為美味的深紅色肉。這個展示堅果是一個真正的多感官體驗。

鰐棃

千禧一代可能是鰐棃吐司風潮的功臣，但這種水果至少從西元前500年就開始流行了。”阿茲特克人稱之為ahuacatl，有人說它可以翻譯成睾丸這個詞雖然這個名字可能是由於鰐棃的形狀和生長模式，鰐棃確實提供提高生育能力的好處。一半的鰐棃含有我們每日推薦劑量的10%左右的維他命E，而且維他命E已經被證明對男性和女性都有助於生育。”她補充說，鰐棃還含有豐富的B族維他命，可以補充能量和活力。

人參

被稱為中醫之父的神農皇帝據說用人參作為壯陽藥來刺激性欲和治療勃起功能障礙。潘指著國家衛生研究院的一份報告說：“人參被認為是5000多年前發現的，從那時起，人參就被用在中醫藥中來新增性欲。”

How to improve the precision of stamping parts?

1. Keep the surface of the convex and concave molds clean, and the blanks of the precision stamping parts need to be wiped clean before drawing, to avoid the unclean cleaning of the die working surface or the material surface and the inclusion of debris, which can damage the surface of the precision stamping parts and affect the quality.To get more news about Stamping steel parts, you can visit tenral.com official website.

2. Keep the surface of the convex and concave molds clean, and the blanks of the precision stamping parts need to be wiped clean before drawing, to avoid the unclean cleaning of the die working surface or material surface and the inclusion of debris, which can damage the surface of the precision stamping parts and affect the quality.

3. The radius of the corner of the die is polished and polished to avoid the rough surface of the corner of the die, and the surface of the precision stamping part is scratched when drawing.

4. Properly increase the hardness of the surface of the male and female molds and frequently check the surface of the male and female molds when drawing. Even if the metal scraps left by it are removed, because when the hardness of the male and female molds is low, after the metal scraps are attached to the surface, the drawing Precise stampings produce pull marks.

20 best Mother's Day jewelry gifts of 2021

Mother’s Day is almost here, meaning you should consider gift shopping now, if you haven’t already started, to avoid potential shipping delays. Beyond penning a heartfelt note in her Mother’s Day card and sending her a fresh flower delivery, you can treat your mom (or mother figure) to timeless or trendy jewelry. From classic stud earrings and dainty necklaces to sparkly bracelets and cocktail rings, there is plenty of Mother’s Day jewelry available on the market, covering many personal tastes — and price points.To get more news about best jewelry design and custom websites, you can visit jewelryhunt.net official website.

You can find Mother’s Day jewelry at Shopping reader favorite retailers, from Nordstrom and Amazon to Macy’s and Etsy. Bloomingdale’s, Shopbop and Revolve all carry a mix of contemporary and luxe jewels, while those looking for investment-worthy Mother’s Day jewelry can peruse Matches, Net-a-Porter and Moda Operandi. You can also find jewelry for your mom at Kay Jewelers, Pandora and Ring Concierge. If you like to shop by brand, Kate Spade, Swarovski and J.Crew are all familiar names when it comes to jewelry. For more elevated contemporary pieces, you can opt for Jennifer Fisher hoops and delicate gold jewelry from Jennifer Meyer.

Here are our picks for highly rated and stylish jewelry gifts that are worth considering this Mother’s Day, broken down by category: earrings, necklaces, bracelets and rings. We also rounded up jewelry organizers, including travel-friendly options for when your mom feels comfortable taking trips again.

Jennifer Behr crafts statement-making jewels and hair accessories, and Behr’s Elips earrings stay true to her whimsical aesthetic. The gold-plated drop earrings feature star- and pearl-shaped Swarovski crystals your mom can rock during socially distant evenings out or at her next virtual happy hour.

The Loucite, a pair of jelly hoop earrings with colorful enamel detailing, is designer Alison Lou’s signature piece of jewelry. It comes in two sizes — Small and Medium — and is made in various colors, like Mint and Pink Tie-Dye. Each hoop comes equipped with a gold-plated brass earring back.

Mateo’s triangular-shaped stud earrings are made of 14-karat gold and feature classic pearls and diamonds with a post closure. Pearls have become a style signature for the brand’s founder and designer Matt Harris. His pieces have been spotted on Rihanna, Zendaya and Solange Knowles.

Shopping for investment-worthy diamond earrings for your mom? These VRAI ear cuffs are sold as either a single earring or as a pair. After selecting either yellow, white or rose gold, you have the option to choose between four or six diamonds per earring. You’re also able to pick the cut of the diamonds: round, pear, emerald or marquise.

Dannijo’s 16-inch Paz choker features a fun mix of colorful glass beads and freshwater pearls. Your mom can sport the gold-plated necklace alone or layer it with longer necklaces like this fun Marley model featuring a “love” pendant.

Your mom can add a whimsical, beachy flair to her summer outfits with this gold-tone necklace featuring a cowrie seashell pendant from SHASHI. According to the brand, the necklace will hit around your mom's collarbone. To further play up the carefree feel of the necklace, consider also gifting your mom a matching pair of shell earrings.