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1、Content1. Foreword.32. Preparation before laying out cables.353. Principal requirements of laying out cables564. Drawing cables.675. Fixing cables.76. Laying out cables in the metal duct.77. Laying out cables in the refrigeration area78. Laying out cables near the radio electric equipments789. Check
2、ing items.81. Foreword1.1 This workmanship is based on the GL rule 2000, IEC standard No.92-401 publication, relative rule in the workmanship for laying out the marine cables of the professional standard of the Peoples Republic of China and the specification of the ship, combinated the traditional w
3、orkmanship and the practicality of our shipyard.1.2 The following problems in laying out cables are stated in other documents about workmanship:a. Cables grounding workmanship is shown in the grounding workmanship for electric equipments. b. Processing cables end is shown in the installing workmansh
4、ip for electric equipments. c. Sealing cables is shown in the sealing workmanship for marine cables. (QB/LRA32008-91)d. The laying out cables workmanship with special requests is not included in the document.2. Preparation before laying out cables2.1 Prepare the following relative working drawings a
5、nd technical documents:a. The workmanship of laying out cablesb. The workmanship of sealing cablesc. The workmanship of electric equipments groundingd. The combination electric lofting drawing e. The arrangement drawing for electric equipmentf. The first electric system drawing, the second electric
6、system drawingg. The cable of main way tending towards drawingh. The cables list book and the drawing cables booki. Other drawings and technical documents about laying out cables2.2 According to the above working drawings and documents, prepare all kinds of fabricated sections, fixtures and necessar
7、y tools for laying out cables. It is better to arrange the fixtures and fabricated sections according to the working area, and to place them separately.2.3 For conveniently installation on board, the fixtures of cables shall be made as assembling parts in the workshop. The assembling parts are shown
8、 in table No.1.The bracket of assembling parts shall be enough strong. The distance between the feet of assembling parts is usually not more than 1500mm.1supporting angle bar 2I type bracket 3bracket angle bar2.4 According to the cables list and cables laying out book, cut cables for preparing, try
9、best to earlier cut the cable laid out later, later cut the cable laid out earlier. Coil cables on the cables drum in turn according to the sequence of laying out. 2.5 Make the temporary mark of cables in advance. On the mark shall state the number of cables, size, length, the ending equipments and
10、position. It is proper to dividually make at least two marks on two ends of every cable. The temporary marks may be made of the white rubberized fabric. When cutting every cable, tie the temporary mark on the two ends of cable.2.6 If there are some cables through stop opinion of cofferdam or deck, s
11、hall make the striking marker “stop opinion” with different color painting.2.7 The cutting section of cable shall avoid damp to affect insulation, when it necessary properly close it.2.8 According to the lofting drawing for cables and the size of fixture and fitter confected in advance, to execute l
12、ocation on board, draw the welding position of fitter and fixture and the opening position and dimension of cable bracket, cable penetration, stuffer box.2.9 Make holes on the structure and deck.2.9.1 The opening usual shall be round or kidney shaped, if the opening is other shape, at less it shall
13、be round corner. The size of hole shall comply with cable frames, cable canisters, stuffer box, and not proper to be too big.2.9.2 Make hole on the deck stringers, webs, showing in the table No.2. a. The highness of opening (h) shall be not over 25% of the highness of stringers and webs, the width o
14、f opening (I) shall be not over 60% of the distance of frames (L) or shall be complemented intension; the distance from the edge of opening to the stringer panel shall be not less than 40% of the highness of stringer web (B).b. Openings shall be scattered, can not be concentrated in the distance bet
15、ween longitudinal frame or distance between frames at same time, when it is need to make two or more holes, shall arrange along the horizon, the sum of all width of holes shall be not over half of the distance between frames or longitudinal frames.If the opening is not complied with the above, it shall be compleme
