A boreable multiduct assembly packaged for sale includes a receiver, a continuous outer conduit having a central lumen and multiple innerducts held freely in that lumen.

A power cable includes a conductor; an insulator; an inner shield layer; an inner corrosion-proof layer; an outer shield layer; and an outer corrosion-proof layer, provided from center toward outside, wherein only the inner shield layer among the inner shield layer and the outer shield layer is directly grounded at one end of the power cable in an axial direction, and wherein only the outer shield layer among the inner shield layer and the outer shield layer is directly grounded at the other end of the power cable in the axial direction.

A power cable includes a conductor; an insulator; an inner shield layer; an inner corrosion-proof layer; an outer shield layer; and an outer corrosion-proof layer, provided from center toward outside, wherein only the inner shield layer among the inner shield layer and the outer shield layer is directly grounded at one end of the power cable in an axial direction, and wherein only the outer shield layer among the inner shield layer and the outer shield layer is directly grounded at the other end of the power cable in the axial direction.

An apparatus for relieving tension of an electric cable includes an anchor plate; a bell mouth supporting the cable; a plurality of guide supporting bars directly connecting the anchor plate and the bell mouth; an elasticity controller through which each guide supporting bar is penetrated and inserted; a mobile supporting plate elastically supported by one end of the elasticity controller, the mobile supporting plate selectively pressurizing the elasticity controller according to the tension of the cable and moveable along a longitudinal direction of the plurality of guide supporting bars; a fixed supporting plate provided between the mobile supporting plate and the bell mouth, the fixed supporting plate being supported and fixed to each guide supporting bar, the other end of the elasticity controller being supported by the fixed supporting plate; and one or more spring cleats combined with the mobile supporting plate, the spring cleat adapted for holding and fixing the cable.

A preformed block is used for housing and routing electrical power cables, and comprises a central cavity. At least two adjacent faces of the block have an opening which connects to the central cavity. Electrical power cables can thus be routed within the block between those openings, from a side face (leading to a trench) to the top face (leading to an electrical installation on top). There is also provided an electric vehicle charging station using the precast block and a method of casting a block.

A cable line includes a conduit having a tubular body, the wall of which is made of polymeric material, and an electrical cable provided with an outer sheath made of polymeric material and laid inside the conduit's body along its entire length.

Herewith, the body wall is made with the provision of its electrically conductive properties, causing the possibility of current flow through the wall in the direction from its inner surface to the outer surface, furthermore the ratio of the diameter of the inner surface of the body wall to the diameter of the outer sheath of the cable is not less than 1.5.

A device, such as a link box, with health monitoring has a housing defining an interior space, at least one surge arrester positioned in the interior space, at least one contactless temperature sensor positioned to contactlessly measure a temperature of the at least one surge arrester and generate temperature data therefrom, and at least one controller connected to the at least one contactless temperature sensor and configured to receive the temperature data.

Space in a conduit having at least one cable therein which is surrounded by a duct is recovered by longitudinally cutting the duct and removing the duct from around the cable. The duct may be pulled out of the conduit and past a blade to affect the cutting, or a blade may be pulled through the conduit to cut the duct while still in the conduit.

Space in a conduit having at least one cable therein which is surrounded by a duct is recovered by longitudinally cutting the duct and removing the duct from around the cable. The duct may be pulled out of the conduit and past a blade to affect the cutting, or a blade may be pulled through the conduit to cut the duct while still in the conduit.

Devices, systems and methods to prevent damage to power and communication conductors located in cold occurring regions, with an elongated cylindrical tubular assembly of closed cell foam within a braided/woven layer that can be sealed to provide longitudinal strength and a snag resistant durable and flexible outer coating. The assembly along with communication and power lines is pulled through new power and communication ducts and conduits and in retrofitting existing power and communication ducts, so that the assembly reduces the volume spacing in the ducts/conduits that can be damaged by water intrusion which expands during freeze conditions.