d.
h.
After cables and wires are laid, the deflection of cable tray and trunking shall not be greater than 1 / 200 of its span.
When the span is ≥ 6000mm, the deflection shall not be greater than 1 / 150 of its span.
Loose screw connection button and exposed wire core.
j.
For specific installation, refer to national standard 86sd169 and the installation details provided by the bridge manufacturer.
If the joint is not flat and tight, it shall be re wrapped according to the process requirements.
Water may enter the pipeline or the insulation layer may be damaged, which will cause the low insulation resistance of the line.
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The insulation resistance of the line is low.
Qualified products corresponding to the cross section and number of wires shall be selected, and the reserved length of wire core shall be 1.2m.
For the installation of cable tray, the supports and hangers shall be selected according to local conditions, and the supports and hangers of cable tray in a certain section shall be consistent.
c.
The muddy water in the pipeline shall be cleaned in time or the conductor shall be replaced.
b.
The overall layout of cable tray and trunking shall be the shortest distance, economical and reasonable, safe operation, and shall meet the requirements of installation, cable laying and maintenance.
Electric and gas welding is strictly prohibited for cable tray connection.
After the casing is crimped, the position of the die is not on the center line, the die is not matched and the depth is not enough, so the qualified die shall be selected for crimping.
g.
If the core is cut too long, the wire core will be exposed.
The hanger and bracket shall be selected for installation.
[this series is shared by warm Meng] f.
Unqualified wiring buttons and too short margin of wire core cutting will cause loose support and cumbersome.
3、 Installation of cable tray and trunking: a The spacing between horizontal strong current cable trays and supports shall not be greater than 2m.
i.
The section is 10mm ² Single strand copper core wire with section of 2.5mm and below ² Multi strand copper core wires and below can be directly connected with the wiring terminals of electrical appliances, but the multi strand copper core shall be tightened first and connected after tinning.
