The fact that "manguera" normally means "hose" might lead one to think that is refers to a conduit, but in fact an electrical "manguera" is simply a cable with more than one core. In everyday usage, it is just called a "cable", but "manguera" is the correct technical term for a cable with two or more insulated conductors enclosed in an insulating sheath, like the kind of cable we use to plug things into the mains:

"En electricidad, una manguera es un cable formado por varios hilos aislados separadamente y recubiertos todos de una funda de material plástico flexible."
http://es.wikipedia.org/wiki/Manguera

In English, it is simply called a cable.

The kind of "manguera" mentioned here, H07RN, is a hard-wearing cable suitable for high-voltage and outdoor use:

"Rubber Flexible Cables
H07RN-F Cable to BS7919
Application: These cables are designed to provide high flexibility and have the capacity to withstand weather, oils/greases, mechanical and thermal stresses. Applications include handling equipment, mobile power supplies, worksites, stage and audio visual equipment, port areas and dams. Also for use in drainage and water treatment, cold environments and severe industrial environments.
[...]
Insulation: EPR (Ethylene Propylene Rubber) Type EI4 to BS7655
Sheath: PCP (Polychloroprene) Type EM2 to BS7655
Sheath Colour: Black
Voltage Rating: 450/750V
Core Identification:
2 Cores: Blue, Brown
3 Cores: Green/Yellow, Blue, Brown
4 Cores: Green/Yellow, Brown, Black, Grey
5 Cores: Green/Yellow, Blue, Brown, Black, Grey
6 Cores and above: Black with White numerals, Green/Yellow"
http://www.eland.co.uk/electricalcable/rubberflexiblecable/c...