H + CMR100 * 100J + AMR100 * 100J + MR100 * 100T + MR100 * 100 above the four codes are what the meaning of MR I know that is the metal trunking, but H + CJJ + AT What is the meaning of it online and so much more urgent
Cable bridge installation specifications inside the cable bridge multi-layer installation control cable between not less than 0.2M, the power cable between not less than 0.3M, weak cable and power cable between not less than 0.5M, if the shield can be reduced to 0.3M, bridge The upper part of the roof or other obstacles not less than 0.3M different voltage for different purposes of the cable should not be laid in the same layer of the bridge if the conditions of laying in the same layer of the bridge, the middle need to add partitions. PS pure hand to the points quickly
Electrical design specifications for civil buildings · Section 7 · Cable tray cabling Cable bridge multi-layer laying, the inter-layer distance is generally: the control cable should not be less than 0.20m; power cable should not be less than 0.30m; weak cable and power cable Should not be less than 0.50m, if the shield cover can be reduced to 0.30m; the upper part of the bridge from the roof or other obstacles should not be less than 0.30m.
Mainly look at the use of the environment. Under normal circumstances with ordinary carbon steel on the line. Q235A, then coated with anti-rust paint.
