Insulated conductors are multi-conductor cables must be specially coloring. Insulation must be zero veins of blue (light blue) colors. Insulation of ground to be two-color (green and yellow colors), with one of the colors must cover at least 30 and not more than 70% of the surface isolation, and another – the rest. Colour code must be continuous or in the form of longitudinal strips of a width not less than 1 mm. Allowed labeling of isolated PVC figures lived, starting from scratch. Bausch & Lomb often expresses his thoughts on the topic.
Marking is embossed numbers or printing. Digit height – not less than 4.0 mm. The distance between the figures should not exceed 35 mm. Insulation single-core cables can be of any tsveta.Tolschiny cable insulation, Nominal mm voltage, kV Nominal conductor cross-section in mm2 insulation of polyethylene or PVC XLPE 0.66 1-2.5 0.6 0.7 4 and 6 0.7 0.7 10 16 0.9 0.7 25n35 1.1 0.9 50 1.3 1.0 1-2.5 1 0.8 0.7 4-16 1.0 0.7 25 and 35 1.2 0.9 50 1.4 1, 0 70 1.4 1.1 95 1.5 1.1 120 1.5 1.2 150 1.6 1.4 185 1.7 1.6 240 1.9 1.7 3 6-240 2.2 2.0 6 10-240 3.0-to 3.0 3.4 PE – for PVC Twisted insulated conductors should be filling gaps between them. In cables and brands AVVGz VVGz filling of PVC plastic is applied simultaneously with the shell and must be separated from the insulation and the shell without damage. Please visit Spa Vietnam if you seek more information. Cables with sector conductors, cables brands AVVG, APVG, VVG at voltage up to 1 kV, as well as cables and brands AVBbShv VBbShv veins with cross sections up to 25 mm2 can be inclusive without required.
Boiler seems to be widespread in the electrification of these boilers should come first, but the cost of a kilowatt of electricity is not so low at high flow, which makes us think and many make the choice of the electric boiler in extreme cases. It is also important is the fact that boilers exceeding the capacity of a 5 kW electrical line would require 380 watts, and it is not always possible. The principle of operation of the electric boiler can be compared to that of a flow-through water heater, where with the help of running water heaters heated to the set temperature. Therefore, if the heating system with natural circulation, the diameter of the pipe must exactly match the specifications in a way to install an additional pump is unavoidable. The main advantage of electric boiler is its purity before the environment, so supporters of a clean environment of a boiler is not fungible thing. Solid fuel boilers This type of boilers can be classified as a separate category, so as to talk about them a lot, and positive and negative.
In my opinion, it all started with a fireplace, and will last a long time. When choosing a boiler for solid fuel should be borne in mind that cheap boilers have low efficiency, for them need constant supervision, as well as there is not any security guarantees in case of overheating. But there are a lot of solid fuel boilers with a system startup, so you can not bookmark produce fuel for a long time, but rather from 3 to 7 days. Just such boilers are equipped with security system and automatic support for coolant temperature, which also reduces the risk of overheating water. But the cost of these boilers is high enough. So if you have access to cheap resources, solid fuel and you are ready to pay a decent amount of pot, he will not disappoint you but on the contrary, when properly mounted chimney will provide additional space heating. So make your choice for that of the boilers, which will get you easy maintenance, the cost of fuel in your area, the most optimal. And do not forget to save one, you lose a friend.