Professional Cable Tray Manufacturer

First, the selection of the type and variety of cable tray 1, the cable network that needs to shield the interference of electrical appliances or the requirement of protecting external (such as corrosive liquid, flammable dust, etc.), (FB) trough type compound anticorrosive shielded perforated cable tray (with cover) should be selected. (F) composite epoxy resin anticorrosive and flame retardant cable tray should be used in strong corrosive environment. 
The supporting arm and bracket should also be made of the same material to improve the service life of the bridge tray and accessories and the cable tray. 
Cover plates should be added in environments or outdoor places that are easy to accumulate dust and other areas that need to be covered. 
In addition to the above cases, tray type, trough type, cascade type, glass anticorrosive and flame retardant cable tray or steel ordinary bridge tray can be selected according to the environmental and technical requirements of the site. 
Cover plates should be added in environments or outdoor places that are easy to accumulate dust and other areas that need to be covered. 
When crossing a road section in a public passageway or outdoors, it is appropriate to add a cushion plate or use a tray at the bottom of the bottom step. 
When the long span crosses the public channel, the load capacity of the bridge can be improved or the frame can be selected according to the requirements of users. 
Long-span (>3m) should choose composite bridge (FB). 
Choose the composite epoxy resin bridge (F) outdoors. 
The width and height of the bridge should be selected according to the table below, and the true filling rate of the cable should not exceed the specified value of the relevant standards and specifications, 40-50% for power cable and 50-70% for control cable, and a margin of 10-25% should be left. 
The specifications of various bends and accessories shall meet the layout conditions of the project and match with the bridge frame. 
The selection of the specifications of supports and hangers shall be arranged according to the specifications, number of layers, span and other conditions of the bridge. 
And should meet the requirements of the load. 
For the selection of cross-sectional area of the bridge, see Table 3. The configuration of supports and hangers. The short spans of indoor branches and hangers are generally 1.5-3m. 
The span of outdoor column is generally 6m. 
The following principles shall be followed in the configuration of supports and hangers for non-linear segments. 
When the width of the bridge frame is-lt;300mm, a support and hanger should be set up on the side of the straight line segment 300-600m away from the combination of the non-linear segment and the straight line. 
When the width of the bridge frame is-gt;300mm, in addition to meeting the following conditions, a support and hanger should be added in the middle of the non-straight line section. 
The center distance between layers is 200250300350mm when the bridge is set up with multiple layers. 
The straight line section of the bridge should leave 20-30mm expansion joints every 50m (metal bridge). 
Fire prevention construction requires that the fireproof sections of the bridge must be made of steel or non-flammable or flame retardant materials. 
The BJIII series perforated cable tray bridges produced by our company are fireproof bridges. 
The bridge system should have reliable electrical connection and grounding (for metal bridges only). 
The following requirements should be met when the bridge system is allowed to be used to form a grounding trunk circuit. 
The connection resistance between the ends of the bridge should not be more than 0.00033 ohms, and the insulation coating should be removed from the grounding hole. 
In the direct grounding system of 1KV and below neutral point, the grounding of the powered equipment is connected with the neutral grounding of the system. 
When the power supply is dynamically cut off, the metal cross-sectional area in the long direction of the bridge should not be less than the specified value. 
When another grounding line is laid along the full length of the bridge, each section (including non-straight line) should be reliably connected with the grounding line at least one point. 
For vibration places, spring coils should be installed at the connections of the grounding parts. 
The design of the bridge system shall be closely coordinated with civil engineering, technology and related specialties to determine the best layout, and the design content may include: 1. The relevant section of the bridge system. 
Layout of the bridge system. 
List of specifications and quantities of straight line segments, bends, supports and hangers required for the bridge system, as well as necessary instructions. 
Technical description or schematic diagram of non-standard parts with special requirements.