Polymeric composition useful as electrical conduit covering and insulated electrical conduit

1. A polymeric composition useful as an electrical conduit covering, consisting of:

100 parts by weight of a base polymer containing a polyolefin polymer;

2 to 45 parts by weight of a polyamide, based on 100 parts by weight of the base polymer, wherein the polyamide is a copolymer of polyamide 6 and polyamide 66 and has melting point equal to or lower than 190° C.; and

70 to 90 parts by weight of a metal hydroxide, based on 100 parts by weight of the base polymer,

wherein the composition is flame-retardant composition;

wherein the polyolefin polymer consists of polypropylene polymer and ethylene-propylene rubber; wherein the polypropylene polymer consists of homo-polypropylene and maleic acid-modified homo-polypropylene;

wherein the homo-polypropylene and the maleic acid-modified homo-polypropylene are blended in a ratio of from 5:1 to 3:2; and

wherein an average particle diameter of the metal hydroxide is from 0.1 μm to 20 μm.

2. The polymeric composition according to claim 1 , wherein the metal hydroxide is a magnesium hydroxide.

3. The polymeric composition according to claim 1 , wherein the polyolefin polymer consists of polypropylene polymer and ethylene-propylene rubber in a ratio of equal to or below 4:1.

4. An insulated electrical conduit having an electrical conductor covered by the polymeric composition according to claim 1 .

5. An insulated electrical conduit having an electrical conductor covered by the polymeric composition according to claim 2 .

6. An insulated electrical conduit having an electrical conductor covered by the polymeric composition according to claim 3 .