5.4 Electrical safety

In the PC and server source of danger is the electric part, namely, the input circuits of the power supply, which can be connected to the current industrial voltage 240 V, 50 Hz, with isolated neutral. Output circuit of the power supply is 15 ± 5V. Consequently, according to electrical codes (PUE) 1.1.3 device belongs to installations with a rated voltage up to 1000V to use the premises from a PC belongs to a class of premises without heightened risk from the point of view of the risk of electric shock. Ambient temperature of room must be +20 ± 5, relative humidity of 60 ± 20%. The room must be non-conductive floors, conductive dust absent, absent electrically active environment, absent the ability to simultaneously touch the metal parts of the instrument and electrical grounding, missing the heat and humidity (PUE 1.1.13). To protect against electric shock, all live parts shall be protected against accidental contact housings (PUE 1.1.32), the device must be grounded. Grounding is performed insulated copper wire 1.5 mm2 (PUE 01/07/78), which is attached to a common ground bus with a total cross-section of 48 m2 by welding. Overall tire attached to the ground, the resistance of which should not exceed 4 ohms (PUE 1.7.65). Meals must be made from the power board through the circuit breaker will be triggered when a short-circuit load.

5.5 Fire safety

The rooms in which are installed PCs, the fire hazards are related to the category D, and shall meet the requirements for the prevention and suppression of fire in accordance with GOST 12.1.004-91. To prevent fire in the zone of conventional PC combustible materials (paper) and electrical equipment, you should take the following measures: use dry chemical OP-5. Powder extinguishers are used to extinguish fires of almost all classes, including the electric equipment under voltage up to 1000 V. Their application depends on the type used in the extinguisher powder. Today it is the most common type of fire extinguishers. Temperature range of them can reach values ​​of -50 to 50 C °. These extinguishers can put out a small fire, electrical, combustible gases and liquids. Inside there is a special extinguisher powder which when sprayed on the surface of the film creates a burning object. Powder contained in OP irritates the respiratory system, so while working with him to use a protective bandage. Fire safety measures are defined in ISO 12.1.004-91. Members are allowed to work on the PC only receive instruction on safety and fire safety in the laboratory as a whole and in every workplace.

5.6 Safety precautions when working with a computer

Personal computer is the appliance. From other electrical appliances it is different in that it provides an opportunity for long-term operation without disconnecting from the mains. In normal operating mode, the computer may be in a mode with reduced power consumption in the standby or idle mode request. In connection with the possibility of continuous operation without shutting down the computer from the electrical outlet should pay special attention to the quality of the organization of power. Impermissible use of substandard and worn components in the electrical system, as well as their surrogate substitutes: outlets, extension cords, adapters, tees. It is unacceptable to modify their own data port plugs that meet other standards. Electrical contacts outlets should have no mechanical loads associated with the connection of massive components (adapters, tees, etc.). All cables and wires shall be located at the rear of the computer and peripheral devices. Their placement in the work zone member is not allowed. Do not make any transactions associated with connecting, disconnecting or moving the components of a computer system without loss of power. The computer should not be used near electric heaters and heating systems. It is unacceptable to place on the system unit, monitor, and peripherals foreign objects: books, sheets, towels, blankets to protect against dust. This leads to a permanent or temporary block its air vents. Forbidden to introduce foreign objects into the ventilation slots or operational components of a computer system. Features of the power of the monitor. The monitor has elements that can maintain a high voltage for a long time after being disconnected from the network. Opening the monitor user is unacceptable under any circumstances. This is not only dangerous to life, but also technically useless, as there is no monitor inside organs, adjusting or setting which the user can improve its performance. Opening and maintenance of monitors can be made only in special workshops.

When you work with your computer you need to know the following measures:

1) must be in the room must be enabled and the light should be lit table lamp;

2) when working with a computer is necessary to observe the correct posture;

3) the distance from the eyes of the monitor should be at least half a meter;

4) how long the PC should not exceed 2 hours