JDG electrical conduit does not need to be jumpered.
According to "CECS120: 2000 socket fastening steel conduit electrical conduit construction and acceptance" stipulates:
5.0.1 Socket fastening steel conduit and its metal accessories composed of electrical conduit, when the pipe and pipe, pipe and box links in line with the provisions of Chapter IV of this specification piping links, the connection may not be set at the junction of the jumper grounding wire. Piping shell should be reliably grounded.
5.02 Sleeve tightly fixed steel conduit piping and grounding wire should not be fusion welding links.
5.03 Sleeved tight-fitting steel conduit lines should not be used as grounding wires for electrical equipment.
Extended information
Instructions:
1, grounding jumper: lightning protection grounding should form a closed and loop after the ground, in the disconnection should be used to grounding jumper, where bolts or rivets connected to the grounding network in the place, should be welded to the grounding jumper, jumper is generally used flat steel and round steel. Grounding jumper according to 40 * 4 flat steel considerations, the use of open connection, pipe fittings across the use of flange connection bolts, rails using fishtail plate fixing bolts, parallel pipelines using welding for comprehensive consideration.
2, frame grounding is considered according to the outdoor steel or concrete structure grounding, each grounding span includes a horizontal ground within 4 meters.
3, steel and aluminum window grounding using No. 8 round steel one end and the window connection, one end and the ring beam main bar connection.
4, equipotential box and local equipotential box box box connection set of ground span * 0.5 coefficient, the box and then a separate set of quotas, local equipotential box should be set of junction box installation subheading, total equipotential box set of junction box installation subheading.
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