A flame-retardant cable is disclosed, the cable having a core comprising at least one conductor, and a coating layer made from a low smoke zero halogen flame-retardant polymer composition comprising an ethylene vinyl acetate copolymer and a polyethylene having a density lower than 0.925 g/cm.sup.3 as polymeric base added with: a) from 110 to 160 phr of at least one metal hydroxide; b) from 1 to 7 phr of a phyllosilicate clay; c) from 1 to 7 phr of melamine or a derivate thereof; and d) from 1 to 7 phr of zinc borate.

A medium voltage electric cable having a conductor, an inner semi-conductive layer, an insulating layer, an outer semi-conductive layer, a wire metal screen, a filler layer made from an extruded elastomeric low smoke zero halogen (LSOH) composition containing a polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3 and a metal hydroxide, and an outer sheath made from a low smoke zero halogen (LSOH) composition containing a polymer mixture of an EVA polymer and polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3, the polymer mixture being charged with a metal hydroxide and a phyllosilicate clay.

A medium voltage electric cable having a conductor, an inner semi-conductive layer, an insulating layer, an outer semi-conductive layer, a wire metal screen, a filler layer made from an extruded elastomeric low smoke zero halogen (LSOH) composition containing a polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3 and a metal hydroxide, and an outer sheath made from a low smoke zero halogen (LSOH) composition containing a polymer mixture of an EVA polymer and polyethylene homopolymer and/or copolymer having a density lower than 0.93 g/cm.sup.3, the polymer mixture being charged with a metal hydroxide and a phyllosilicate clay.

A bus bar, which includes a metal bar made of an electrically conductive metal material; a bandage member configured to surround the metal bar except for both ends of the metal bar; and an insulating tube configured to surround the metal bar and the bandage member together, wherein the bandage member is made of a metal wire having a surface coated with a coating material having insulation and fire resistance.

A bus bar, which includes a metal bar made of an electrically conductive metal material; a bandage member configured to surround the metal bar except for both ends of the metal bar; and an insulating tube configured to surround the metal bar and the bandage member together, wherein the bandage member is made of a metal wire having a surface coated with a coating material having insulation and fire resistance.

A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.

A weather-resistant flame-retardant resin composition includes: a polyolefin resin; a mixture of (poly) phosphate compounds, a total content of which is from 10 to 50 parts by mass with respect to 100 parts by mass of the polyolefin resin; 0.1 to 10 parts by mass a non-crosslinked silicone raw rubber having a number-average molecular weight of 10,000 to 1,000,000; and 0.1 to 20 parts by mass of an inorganic UV light shielding agent, and an electric wire and an optical fiber cable whose jacket is formed by the weather-resistant flame-retardant resin.

The present invention relates to a flame retardant polymer composition comprising at least the following components A) 2.0 to 49.8 wt.-% based on the overall weight of the polymer composition of a copolymer comprising ethylene units and units selected from the group consisting of methyl acrylate, methyl methacrylate and mixtures thereof; B) 0.1 to 6.0 wt.-% based on the overall weight of the polymer composition of a polyethylene and/or polypropylene containing units originating from maleic acid anhydride; C) 0.1 to 5.0 wt.-% based on the overall weight of the polymer composition of a silicone fluid and/or a silicon gum; D) 50.0 to 70.0 wt.-% based on the overall weight of the polymer composition of a magnesium hydroxide; and E) 0 to 17.0 wt.-% based on the overall weight of the polymer composition of a copolymer of ethylene and a C4 to C10 alpha olefin comonomer having a density in the range of 860 kg/m3 to 950 kg/m.sup.3 determined according to ISO 1183; wherein the weight proportions of components A) to E) add up to 100 wt.-%. In addition, the present invention refers to a wire or cable comprising at least one layer comprising the polymer composition according to the present invention and to the use of the polyolefin composition according to the present invention as a flame retardant layer of a wire or cable.

The present invention relates to a flame retardant polymer composition comprising at least the following components A) 2.0 to 49.8 wt.-% based on the overall weight of the polymer composition of a copolymer comprising ethylene units and units selected from the group consisting of methyl acrylate, methyl methacrylate and mixtures thereof; B) 0.1 to 6.0 wt.-% based on the overall weight of the polymer composition of a polyethylene and/or polypropylene containing units originating from maleic acid anhydride; C) 0.1 to 5.0 wt.-% based on the overall weight of the polymer composition of a silicone fluid and/or a silicon gum; D) 50.0 to 70.0 wt.-% based on the overall weight of the polymer composition of a magnesium hydroxide; and E) 0 to 17.0 wt.-% based on the overall weight of the polymer composition of a copolymer of ethylene and a C4 to C10 alpha olefin comonomer having a density in the range of 860 kg/m3 to 950 kg/m.sup.3 determined according to ISO 1183; wherein the weight proportions of components A) to E) add up to 100 wt.-%. In addition, the present invention refers to a wire or cable comprising at least one layer comprising the polymer composition according to the present invention and to the use of the polyolefin composition according to the present invention as a flame retardant layer of a wire or cable.

An electrically insulated cable comprising: a core electric wire; a tape member covering the core electric wire; and a covering layer covering the tape member; wherein: the core electric wire includes a plurality of insulated electric wires; the insulated electric wires each include a conductor and an insulating layer covering the conductor; and the tape member has a minimum value of transmittance of 70% or more with respect to light having a wavelength of no less than 400 nm and no more than 800 nm.