Overhead lines to note 1, TT system power supply, the phase sequence arrangement: from left to right for the load for L1, L2, L32, TN-S system, or TN-CS system resistant steel core aluminum stranded when the power supply, and protection of the zero line phase sequence arranged in the same horizontal stretcher set: from left to right for the load L1, N, L2, L3, PE; 3, when the TN-S system, or TN-CS system power supply, power lines, lighting pole erected on the same line, the next two cross arm, phase sequence arrangement method: the upper cross arm twisted steel core aluminum heat parameters for load from left to right L1, L2, L3 resistant aluminum alloy steel core stranding sales, lower cross arm, from left to right for the load L1, (L2, L3), N, PE. When the lighting set up in two lines cross arm, the lowest level for the cross arm load resistant aluminum alloy stranded steel core model, the rightmost wire to find the zero line PE protective grounding line commonly used test to determine the grounding line pull each line method. According to the following steps to deal with single-phase ground fault: (a) ascertain whether true single-phase ground; (2) to ascertain is what phase; (3) to find which line to ground; light load operation by line, heavy and the actual situation of long lines, short circuit or malfunction rate is determined to pull the order line, if the pull of a line, a ground signal disappears, indicating that the ground is on the line. Stranded steel core aluminum heat parameters | resistant aluminum alloy steel core stranding | Anhui Electric Group is provided by Anhui Electric Group Co., Ltd .. Anhui Electric Group Co., Ltd. (www.ahecable.com) strong, credible, in Chuzhou bare wires and bare conductor products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Anhui Electric Group and you hand into the brilliant, for a better future!