Light cable with how much appropriate?

Light, with how much cable is the most appropriate, with high lamp manufacturers to know about the below.

　　1. Light, refers to the street lamp over 18 meters high, generally used in the large square or airport, wharf and other area range is wide, 4 - general configuration 12 a lamp holder, or 24 lamp holder. Lamp holder much load power is big, so you need to cable is also big.

　　2. Light, because the height is higher, common crane to where it is not so high, so isn't very convenient for installation and later maintenance. Aimed at this situation, haiyan lighting design can lift system, inside the light pole with an elevator, the lamp holder dropped to the ground, so installation and maintenance is very convenient, but increased the burden of the cable, cable is therefore need to increase.

　　3. Lamps and lanterns of four, for example, each light 400 w sodium lamp and sodium lamp starting current is 7 amperes (400 w Sodium lamp starting current 2 a, 150 w, 250 w sodium lamp starting current is 4 a, 400 w sodium lamp current is 7 a startup current, no capacitor starting current is 2 a, 1. 7 - 1. 8A) , the 4 * 7 amperes = 28 amperes. According to the wiring common sense ( 1 square 6 a current) And standby, but consider the pressure drop and circuit to damage load using 10 square phase line can be used. High load evenly, in the case of a three-phase even zero line can be less than the line, the customer need equipped with ground wire. This is the so-called three-phase five wire! Street lamps use the same method to wiring, if the customer need low cost, so can use when B can use the single-phase power supply, namely zero ( N) The fire ( L) The power supply. If you need to set up ground ( PE) Line. If you meet a very strict project, also need to set up in the middle of the night light at night, and then point ( A control) Or ( A loop control) 。