隨著房地產市場黃金十年的結束，房地產企業開始在產品創新及成本控制上深耕細作。而在整個開發階段土地成本約占整個開發成本的50%，建安成本占40%左右，其余為營銷及其他成本。而土地成本不可控，建安成本就成為成本控制的關鍵。機電安裝成本在整個建安成本中約占30%左右?？刂坪脵C電設備及材料可以有效的控制機電安裝成本。 As the golden decade came to an end the real estate market, real estate companies are starting to high-value, on product innovation and cost control. In the whole development phase of land cost accounts for about 50% of the cost of development, take cost accounts for about 40%, the rest for marketing and other costs. And the cost of land is not controllable, take cost will be the key to cost control. Mechanical and electrical installation costs throughout the sussing out cost accounts for about 30%. Control the mechanical and electrical equipment and materials can effectively control the mechanical and electrical installation costs. 在供配電系統中電力電纜是輸送電力的主要設備材料，國內目前常用的是銅芯電纜。而國外主要用的是鋁合金電纜。國外在鋁質導體的研究和應用方面， 早在40 年前就率先開發出了AA8000 系列電工級鋁合金作為導體材料。目前美國90%以上的市政民用及工商建筑都采用的鋁合金電纜。成功應用鋁合金電纜已40多年。 Power cable in the power supply and distribution system is the power of the main equipment materials, copper core cable is currently used in China. The foreign main use is aluminum alloy cable. Abroad in terms of research and application of aluminum conductor, first developed as early as 40 years ago AA8000 series electrical grade aluminum alloy as the conductor material. Now the United States more than 90% of the municipal civil, commercial and industrial buildings are used in aluminum alloy cable. Successful application of aluminum alloy cable has more than 40 years. 我國鋁合金電纜發展相對較慢，近10年來美國、加拿大等電纜制造商把合金電纜及其附件安裝配套系統引進國內，使合金電纜得到了快速發展。同時國家及相關行業也推出相關規范：GBT 31840.1-2015 《額定電壓1kV Um1.2kV 到35kV Um40.5kV鋁合金芯擠包絕緣電力電纜》、GB/T30552《電纜導體用鋁合金線和NB/T42051《額定電壓0.6/1kV鋁合金導體交聯聚乙烯絕緣電纜》。 Aluminum alloy cable development in our country is relatively slow, nearly 10 years the United States, Canada and so on cable manufacturer to introduce domestic alloy cable and its accessories installation system, make the alloy cable has been rapid development. Countries and related industry also launched relevant specification: GBT 31840.1-2015 "Um1.2 kV rated voltage 1 kV to 35 kV Um40.5 kV aluminium alloy conductor crowded insulated power cable", GB/T30552 the cable conductor with aluminium alloy wire and NB/T42051 the rated voltage 0.6/1 kV aluminium alloy conductor crosslinked polyethylene insulated cable ". 鋁合金電纜在電工鋁中加入銅、鐵、鎂、硅、鋅、硼等合金元素，采用特殊輥壓成型型線絞合生產工藝和退火處理等先進技術創造的新型材料電力電纜。根據合金成分的不同主要分為兩大類。一類是以AA8030為代表的合金電纜；一類是以AA8176為代表的稀土鋁合金電纜。我們對此都統稱為AA8000系列。 Aluminum alloy cable in electrician add copper, iron, aluminum, magnesium, silicon, zinc, boron and other alloying elements, the use of special type roller pressure molding line twisted production technology and annealing treatment and other advanced technology to create new material power cable. Depending on the alloy composition is mainly divided into two broad categories. A class is a delegate with AA8030 alloy cables; A class is a delegate with AA8176 rare earths aluminum alloy cable. We have called AA8000 series. AA8000系列鋁合金導體典型結構如下圖： AA8000 series aluminum alloy conductor typical structure is as follows: 下面我們分別從技術參數、施工安裝、綜合成本、運營維護四個方面對銅電纜和鋁合金電纜進行比較分析。 Below we respectively from the technical parameters, construction, installation and comprehensive cost, operation and maintenance, the four aspects of copper and aluminum alloy cable for comparative analysis. 1 1 技術參數： Technical parameters: 技術參數是設備材料選擇的一項重要指標。我們以AA8030鋁合金導體為樣本與銅導體進行對比。技術參數中我們重點關注電纜載流量及電壓損耗。導體本身材料性能的對比數據見附表1。 Technical parameters is an important index of the equipment material selection. We use AA8030 aluminum alloy conductor as samples compared with copper conductors. Technical parameters, we focus on cable current carrying capacity and voltage loss. The conductor itself material performance contrast data as shown in table 1. 附表1：鋁合金電纜與銅纜導體性能對比 Table 1: aluminum alloy cable compared with copper conductor performance 有上表可知鋁合金的密度僅為電工銅的1/3；電阻率為銅的1.6倍；導電率為銅的61.8%；抗拉強度為銅的1/2左右；屈服強度及伸長率與銅的下限值基本接近。其中我們最為關注的是導電率和電阻率比較，直接與導電率相關的技術參數就是載流量；直接與電壓損耗相關的技術參數就是電阻率。下面附表2,3分別對這二項參數進行比較分析（附表中比較條件是：鋁合金電纜截面是銅電纜截面的1.5倍）。 Is this the 1/3 of the density of aluminum is only an electrician copper; The resistivity of copper 1.6 times; 61.8% of the electrical conductivity of copper; About half of the tensile strength of copper; Yield strength and elongation and basic close to the lower limit of copper. Among our most concern is the comparison of the resistivity and conductivity, directly related to the conductivity of technical parameters is the carrying capacity; The technical parameters of associated directly with the voltage loss of resistivity. The following table 2, 3 separately to carry on comparative analysis to the two parameters (schedule of compare conditions are: aluminum alloy cable is 1.5 times that of copper cable).