H07V-K "facilities in conducts, located on surfaces or embedded, or in closed systems analogous." Also recommended for fixed or protected light assembly, control, for voltages until 1000V in alternating current (or until 750V in DC)." (UNE 21176).
H05V-K in "rigid installation protected inside systems and to, or on, fixed lights. They are adapted for facilities made in conducts placed superficially or embedded, only in the case of signal wirings or control." (UNE 21176). This is specially indicated for inner installations, since its high index of sliding facilitates its positioning under an embedded tube.
H05V-K In tubes closed only in signal wirings and control. In internal wiring of equipment and electrical mechanisms in zones with normal temperature.
H07V-K In closed and tubular tubes, canals. In internal wiring of equipment and electrical mechanisms in zones with normal temp. The highest temperatures of the conductor to whom a cable in individual can work, depends on the limit temperatures of other cables & accessories are in contact with.