在選用電線電纜時，一般要注意電線電纜型號、規格（導體截面）的選擇。 When choosing wire and cable, we should pay attention to the choice of wire and cable type and specification (conductor cross section). ⒈電線電纜型號的選擇 Selection of wire and cable model 選用電線電纜時，要考慮用途，敷設條件及安全性；例如： When selecting wires and cables, the use, laying conditions and safety should be considered; for example: 根據用途的不同，可選用電力電纜、架空絕緣電纜、控制電纜等； According to the different uses, power cables, overhead insulated cables and control cables can be used. 根據敷設條件的不同，可選用一般塑料絕緣電纜、鋼帶鎧裝電纜、鋼絲鎧裝電纜、防腐電纜等； According to the different laying conditions, general plastic insulated cables, steel tape armored cables, steel wire armored cables and anticorrosive cables can be selected. 根據安全性要求，可選用阻燃電纜、無鹵阻燃電纜、耐火電纜等。 According to the safety requirements, flame retardant cable, halogen free flame retardant cable and fire resistant cable can be selected. ⒉電線電纜規格的選擇 Selection of wire and cable specifications 確定電線電纜的使用規格（導體截面）時，一般應考慮發熱，電壓損失，經濟電流密度，機械強度等選擇條件。 When determining the specifications of conductor and cable (conductor cross section), we should generally consider heating, voltage loss, economic current density and mechanical strength. 根據經驗，低壓動力線因其負荷電流較大，故一般先按發熱條件選擇截面，然后驗算其電壓損失和機械強度；低壓照明線因其對電壓水平要求較高，可先按允許電壓損失條件選擇截面，再驗算發熱條件和機械強度；對高壓線路，則先按經濟電流密度選擇截面，然后驗算其發熱條件和允許電壓損失；而高壓架空線路，還應驗算其機械強度。若用戶沒有經驗，則應征詢有關專業單位或人士的意見。 According to the experience, the low voltage power line, because of its high load current, usually selects the cross section according to the heating condition, and then checks the voltage loss and mechanical strength. The low voltage lighting line can select the cross section according to the condition of the voltage loss, and then check the heat condition and the mechanical strength. First, choose the cross section according to the economic current density, then check the heating condition and allowable voltage loss, and the high voltage overhead line also calculates its mechanical strength. If the user has no experience, he should consult the relevant professional units or people. 電線電纜的運輸和保管 Transport and storage of wire and cable 1、運輸中嚴禁從高處扔下電纜或裝有電纜的電纜盤，特別是在較低溫度時（一般為5℃左右及以下），扔、摔電纜將有可能導致絕緣、護套開裂。 1, in transportation, it is strictly forbidden to throw cables or cable plates from high places, especially at lower temperatures (usually about 5 degrees centigrade or so). Throwing and throwing cables may cause insulation and sheath cracking. 2、盡可能避免在露天以裸露方式存放電纜，電纜盤不允許平放。 2, try to avoid storing cables in the open air as far as possible, and the cable disks are not allowed to be placed horizontally. 3、吊裝包裝件時，嚴禁幾盤同時吊裝。在車輛、船舶等運輸工具上，電纜盤要用合適方法加以固定，防止互相碰撞或翻倒，以防止機械損傷電纜。 3. When hoisting packages, it is forbidden to hoist several disks simultaneously. In vehicles, ships and other means of transport, cable plates should be fixed in suitable ways to prevent collision or overturn, so as to prevent mechanical damage to cables. 4、電纜嚴禁與酸、堿及礦物油類接觸，要與這些有腐蝕性的物質隔離存放.貯存電纜的庫房內不得有破壞絕緣及腐蝕金屬的有害氣體存在。 4, the cable is strictly forbidden to contact with acid, alkali and mineral oil, and should be kept in isolation with these corrosive substances. There shall be no harmful gas that destroys the insulation and corrodes the metal in the storeroom of the storage cable. 5、電纜在保管期間，應定期滾動（夏季3個月一次，其他季節可酌情延期）。滾動時，將向下存放盤邊滾翻朝上，以免底面受潮腐爛。存放時要經常注意電纜封頭是否完好無損。 5. During the period of storage, the cable should be rolled regularly (once a month in the summer and postponed in other seasons in time). 3. When rolling, store the side of the plate downward and turn it upwards, so as to prevent the bottom from getting damp and rotting. When storing, always pay attention to whether the cable head is intact. 6、電纜貯存期限以產品出廠期為限，一般不宜超過一年半，最長不超過二年。 6, the duration of cable storage is limited to the product's factory life. Generally, it should not exceed one and a half years, and the longest period will not exceed two years.