Types Of Wires And Cables
The main purpose of the cab is the transmission and distribution of electricity in networks with a voltage of up to 1,000 volts at an industrial frequency of 50 Hz AC. Household networks use WVG cables with a section of up to 6 square metres to electrify private houses up to 16 square metres. In the fitting, a minimum radius of 10 wire sizes in width is allowed. Cabelle's going in 100 meters.
Among the varieties of AVG cab are: AVG with aluminium housing, WVG with a flame retardant, WVG is a flat section, WVG with an addition of PVC or rubber insulation, and between individual dwellings.
WVG is the most common copper cable for internal installation. They put it in open, in boxes, in shorts. Insulation of the VHS provides him with a long life of 30 years. The number of VAH cables may correspond to the needs of both a three-phase and one-phase network: between two and five.
The most common colour of the external insulation of the WVG cables is black, but recently the white WHG has ceased to be very rare.
The insulation colour of individual VVHs corresponds to the standard marking: for RES, yellow green, for N, blue or white with blue stripes, and the insulation of phasers is most often carried out purely white.
Modifications of the WHG cab with the markings " NH " and " LS " , respectively, are characterized by the inability of insulation to spread combustion and low smoke during fire exposure. There is also a VH retrofit, which is capable of completely resisting open fire for some time in minutes. This modification is marked by Latin letters FR.
There is no cable in the household that is similar to the characteristics of the VHC cable, but which has lived from aluminium - AVG. Its lack of publicity was justified by the restriction on the use of aluminium in distribution networks, as well as the shortcomings of aluminium cable products.
In addition, there is a foreign equivalent of the WBG cable produced under international DIN standard. This is about NYM cable. From the WHG, it is somewhat improved, in particular by having a special self-propelled inner filler that ensures the sealing of the compounds.
