Q:(Eg, 10-30 pairs of cable with ф32 heat shrinkable tube, 50 pairs of cable with a large heat shrink tube, 100 pairs of cable with a large heat shrink tube, and so on. The The The The The And so on. Seek expert answer. The More

If the location is correct now there is no need to re-do, otherwise the wall more than the impact of the quality of housing. After the cloth is good, with cement mortar cast is the best, with fast sticky powder repair wall can also be. There is no cement mortar.

Q:In addition to fire and emergency public parts, other pipe wear all use PVC pipe, so, the original a lot of like exhaust fan power, elevator power ah, the distribution box in the dual-control power supply are fire cables, Can you wear PVC pipes? I look like are wearing steel pipe, useless PVC pipe, the specification and technically can do so? Help! More

3 Terms and Definitions 3.1 Flameproof flameretardance Under the specified test conditions, the specimen is burned, and after the removal of the fire, the flame spreads on the specimen only within the limits and self-extinguishing, that is, Or the ability to spread. 3.2 Fire-resistant fire has the ability to continue to operate in a specified state when burned at a specified source of fire and time, that is, the ability to maintain line integrity. 3.3 halogen-free halogenfree halogen-free, low corrosive combustion products. 3.4 low smoke lowsmoke combustion generated less smoke, that is, light transmittance (visibility) is higher.

Q:Heat shrink tubing specifications and materials are what

Depends on how much of your cable, as long as you can set into the heat shrink on the line.

Q:Different diameter of the pvc tube were able to wear large area of the wire

Lion cable to teach you to correctly distinguish between high and low voltage power cable

Q:On the cable cross-sectional area, I would like to ask 3 * 10 +2 * 6 under the cable casing, casing to thick, the best formula

Wire is required to multiply the number of roots, such as: BV-3 * 2.5 its volume is BV-2.5 single length * 3; cable is not multiplied by the root floor, calculated by the core, such as: YJV-4 * 25 + How long is it long?

Q:Is it necessary to protect the buried cable? What position is needed?

Galvanized cable between the bridge between the ends of the bridge can not be grounded jumper cable, but each connection plate should have no less than two anti-loose nut or anti-loose washer connection bolts When the cable bridge is allowed to form a grounded trunk circuit, the cable bridge and its support, hanger and connecting plate shall be capable of withstanding the earth fault current and satisfying the thermal effect As the grounding cable of the cable tray of its tray, the connection between the end of the ladder should not be greater than the resistance of the past, When using the cable bridge for the grounding line when the bridge across the line of various expansion joints and soft joints should be used copper wire or braided copper wire connection should not be less than 16mm2 when the cable along the cable line alone laying the ground trunk trunk line with flat steel Laying its cross section should not be less than 60mmz Outside the laying of the cross-section should not be less than 100mm2 cable bridge in the introduction of the building should be made with the building indoor ground trunk or outdoor grounding device connected In order to prevent electrochemical corrosion in the aluminum alloy cable bridge can not use bare copper conductor for the grounding line to see the original tie & gt;

Q:Now do the smart system. Equipment is 24V DC power supply, there are some 200V AC, using the 485 twisted pair communication, the current is not large. I would like to consult: .485 lines and DC cable with the tube lay it? Can I line with AC cable? .485 twisted pair can also communicate and power supply it? Please consult the relevant experts. More

Seemingly can not be changed together, need a change of a property, there may be changed together, but I was a one before the change.

Q:Is it really important to plug the cable?

Jumper wire for the role of electrical conduction from the conduction of the potential; jumper for the two sections of the bridge junction, it plays the role of leakage protection; if a number of bridges connected to the jumper to prevent leakage when the bridge does not Other bridge connected to lead to leakage caused by personal harm, and ultimately there will be a ground wire to connect the bridge to the earth. hope this helps.

Q:Home improvement is the PVC pipe is a good pipe or galvanized steel pipe? why?

Control, generally can be connected to three two-core control loop or two three-core control loop, there is a spare. Control cable from 2 to 10 core has, depending on the need, usually from the same control unit out of the control line are as much as possible in a cable, easy to maintain. Orthogonal twisted conductor core or cable insulated wire core, stranded structure are starting from the center of a lower layer, each additional layer, an increase of 6 core, that is, 1 +6 +12 +18 +24 +30 Each of which is adjacent to each other and has a difference of 6 cores. Practice has proved that in the outer layer of each layer plus 6 core after the total number of cores can be formed around the outer circle of the outer layer of each core connected to the outer circle, this can be used to explain the principle of geometry.

Q:Laying the distance between the wire line card is how much reasonable

This is very troublesome, directly to the set-top box video output into the TV input AV. the DVD video output and TV input AV. directly with the muscle muscle derogatory can be hit Jiu turtle snow camera remote control switch signal source and more trouble.