Road traffic signal lamp ground wire device to note:

1, grounding, grounding cable for VV1 x 16 was line, and manipulation of the wires are the same as pipe laying, and transformer ground connection, and each light pole connecting again. Light pole grounding with a grounding system. The ends of the earth chooses phi 20 x 2 m galvanized round steel. The ends of the earth with the light pole should be strong cohesion, single the ends of the earth with less than 10 ohms (distribution box, control box), ground resistance is less than 4 ohm;

2, ensure junction box strong cohesion between the different circuits and their ground;

3, the lightning protection of the whole railway network security grounding all throughout;

4, zero line shall be repeated at transformer grounding;

5, from core transformer grounding alone was in the public protective zero line to each pole, junction box, etc can all electric iron shell;

6, the road traffic signal light pole as grounding system, lightning protection using reinforced concrete foundation with grounding galvanized round steel end fixed on the screw nut, on the other side with light pole foundation reinforcement welding, the weld is longer than at least 100 mm;

7, road traffic lights embedded steel pipe end shall be crossing the strong cohesion and grounding line. Zero line on repeat grounding, grounding resistance R 4 or less Ω; Low voltage electrical equipment grounding device R 4 or less Ω, grounding welds are brush asphalt anticorrosive oil。

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