In some embodiments, a cable can include an electrically conductive inner core. A first insulation layer can be disposed about the inner core. An electrically conductive layer can be disposed about the first insulation layer. A second insulation layer can be disposed about the electrically conductive layer. A first polymer jacket can be disposed about the second insulation layer. The first polymer jacket can include a first layer of armor strength members disposed therein. A second polymer jacket can be disposed about the first polymer jacket. The second polymer jacket can include a second layer of armor strength members disposed therein. An outer polymer jacket can be disposed about the second polymer jacket. At least one of the first polymer jacket, the second polymer jacket, and the outer polymer jacket can be formed from an aliphatic polyketone polymer, an ethylene-propylene copolymer, a polyolefin elastomer, a polypropylene, or a cross-linkable polyethylene.

A power cable includes from inside to outside: a conductor; an insulation system having an inner semiconducting layer, an insulation layer, and an outer semiconducting layer; a metallic water blocking layer including a first axial section, a second axial section, and an intermediate axial section arranged between the first axial section and the second axial section and made of a lead-free metal material which is different from a first metal material of at least one of the first axial section and the second axial section. The intermediate axial section is joined thermally along its entire inner or outer perimeter with each of the first axial section and the second axial section to obtain watertight connections. The lead-free metal material has a lower yield strength than the first metal material.

A power cable includes from inside to outside: a conductor; an insulation system having an inner semiconducting layer, an insulation layer, and an outer semiconducting layer; a metallic water blocking layer including a first axial section, a second axial section, and an intermediate axial section arranged between the first axial section and the second axial section and made of a lead-free metal material which is different from a first metal material of at least one of the first axial section and the second axial section. The intermediate axial section is joined thermally along its entire inner or outer perimeter with each of the first axial section and the second axial section to obtain watertight connections. The lead-free metal material has a lower yield strength than the first metal material.

A cable unit designed for connecting a gradient coil, which is embodied to generate a magnetic field gradient in one spatial direction, to a power amplifier, having at least one feed line, wherein the feed line comprises at least two cable elements at least in sections, and the at least two cable elements are connected electrically in parallel.

A cable unit designed for connecting a gradient coil, which is embodied to generate a magnetic field gradient in one spatial direction, to a power amplifier, having at least one feed line, wherein the feed line comprises at least two cable elements at least in sections, and the at least two cable elements are connected electrically in parallel.

Disclosed is an armored cable assembly including a core having a notched assembly tape about a plurality of conductors. A metal sheath surrounds the core.