A mathematical model of heat transfer in cable penetration at the thermal fire influence is proposed. This model allows to study the processes of heat distribution between the elements of cable products and cable penetration construction. A software package based on the finite element method was used for numerical implementation of the proposed mathematical model. To study the influence of cable penetration construction on the cable heating processes there are considered three most common types of penetrations. The dependences of the temperature both of the cable structural elements and the cable penetration on time are obtained. It has been established that if the construction includes air space or a material, that contributes to intensive heat exchange, its fire resistance limit increases. The most dangerous type of cable penetration with filling the entire internal space with fire-fighting foam based on polyurethane foam has been determined in terms of heating the cable and reducing the fire resistance limit

Mining, exploration, and other activities lead to the destruction of lands, and it is important to restore them and use in the national economy. Coal mining is accompanied by the formation of a significant number of empty rocks, from which dumps (waste banks) are formed. These dumps are dangerous because if they contain a large amount of coal, at good thermal insulation there can arise sources of self-heating and then of self-ignition. The article considers the following ways to prevent the formation of sources of ignition in the dump layer: using water in pipelines inside the dump; utilization of combustible gases in solid waste dumps through pipelines with access to the torch or gas processing. The most effective way of fire extinguishing in the dumps of mines can be a combined method, which provides cooling agent (water) supply to the heated area followed by insulation of heated carbon-containing rocks, for example, clay.

The article presents results of comparative experimental studies in accordance with GOST R 50588 using foam generators GPS-100, that are manufactured according to the drawings of FGBU VNIIPO of EMERCOM of Russia, and generators received in recent years by the units of FGBU FPS IPL within the framework of centralized delivery. They are used at frothers testing to determine one of their main indicators - «foam expansion».

The necessity and legitimacy of citizens' appeals to the state bodies on fire safety issues are considered. The correspondence volume between the Emergencies Ministry and VNIIPO of EMERCOM of Russia on the one hand and design firms and individual entrepreneurs on the other hand has been extremely increased recently. The role of self-regulatory organizations, which they should perform in training and professional development of specialists and personnel to their subordinate design organizations and individual designers, is pointed out. There are proposed measures to limit the flow of official correspondence.

The article considers the main issues related to the development of export of fire-fighting products of Russian manufacturers. The main task of forming and maintaining the "Catalog of exported fire products of Russian manufacturers" is assigned to the Interdepartmental working group. This article can be useful for manufacturers of fire products as a reference material.

Autonomous power plants or individual power generators are used to obtain electric energy in the absence or failure of transmission lines from the Central power supply. Fire danger of these units is caused by the use of internal combustion engines operating on different types of fuel (diesel fuel, gasoline, compressed or liquefied gas). Fire safety of electric generator sets is similar to fire safety of boiler rooms and garages. However, there are no special sections in fire safety regulations concerning the electric generator sets. This article presents the necessary information taking into account some special features of electric generator sets and can be used at the reissue of regulations.

There was developed the first version of the interstate standard draft based on the analysis of provisions of national, international and European standards that define the requirements to fire resistance test methods for openings filling structures in fire barriers. The relevance of developing a harmonized standard that fully corresponds to the current international standards is justified.

There are considered the features of fire risk calculations for objects with mass stay of people in accordance with the provisions of "Methods for determining the fire risk ratings in buildings, structures and fire compartments of different classes of functional fire hazard". The main errors and inaccuracies in fire risk calculations are formulated and their consequences are described. The standard variants of calculations are offered.

The work continues to consider approaches to the justification of fire gap reducing between objects of different functional purposes and is a continuation of publications [1-4]. There is carried out the evaluation of the temperature in a room (fire compartment) at fire at the mode controlled by ventilation, as the maximum temperature value is reached. Fire in a room on the first floor of a three-storey kindergarten building is analized. There are considered two limiting cases of heat exchange with room walls: isothermal and adiabatic. The calculation is carried out for the characteristic parameters of residential and administrative buildings (where fire occurs). The solution of the system of 7 transcendental equations was carried out by Seidel method for two limiting cases: adiabatic and isothermal. The temperature values were close (the difference was ≈ 0.5 %).