There are many kinds of indoor cable glands, including indoor dry-wrapped, heat-shrinkable, paper-insulated casting type, etc. But generally used in low-voltage distribution projects are dry-wrapped and heat-shrinkable. But the general low-voltage power distribution project is used in the dry-wrapped and heat-shrinkable type.
Dry-wrapped: the material is just high-pressure tape, color tape, plastic tape, terminals, etc., with artificial direct winding, cable core without additional protection.
Heat-shrinkable terminal head: using plastic gloves, plastic heat-shrinkable tubes, phase-color tubes, terminals and so on, are heat-shrinkable with alcohol blowtorch, first shrink the tube, and then shrink the gloves, phase-color tubes, pressure terminals. Different from the dry pack type is, heat shrinkage way of protection level is higher, the core line more than a layer of plastic tube protection, relatively speaking, but also more beautiful, of course, the price is also much higher, 70 square feet of gloves probably have to dozens of dollars it.
Construction organization design is to enter the field after the preparation of their own, Party A, the design of the cable head requirements according to the requirements to do, no requirements can choose their own practice.
In practice, there is no pre-branching cable head, pre-branching cable is a finished product, according to the height and branch length of the factory processing, transported to the site directly hanging can be, its cable head and ordinary cable head practice, there is no difference. Cable branch at the head of the package is not the scene of processing, the scene can not be processed. The second floor of the statement is wrong, that can only be used to T-connect terminal box or puncture wire clip branch.
Dry-wrapped cable head is generally used in low-voltage cable head, the use of insulating plastic tape winding for dry-wrapped cable head. Pouring type cable head is generally used in high-voltage cable head, he is used to purchase a complete set of finished molds, installation in place after filling the insulating gel to form the pouring type cable head. Heat-shrinkable cable head is generally used in high and low voltage cable head, he is used to purchase finished heat-shrinkable tubes and heat-shrinkable gloves, step by step installation in place step by step with a blowtorch baking heat-shrinkable tubes and heat-shrinkable gloves, heat-shrinkable tubes and heat-shrinkable gloves will be shrunken after the heat to form the cable head.