electrician warsaw
Artificial lighting should ensure sufficient and uniform brightness of the interior of the catering establishment. This lighting is usually incandescent or fluorescent (fluorescent lamps). Bulbs usually give yellow or red light. Kolory te korzystnie wpływają na wygląd potraw i …
The luminous flux F is the basic quantity in lighting technology(Phi). Luminous flux is a measure of the power of the light radiation. It is the amount of light energy radiated by a light source per unit time. The unit of the luminous flux is lumen (lm). One lumen is it …
Just like natural, artificial lighting should ensure sufficient and uniform brightness of the interior of the catering establishment. The artificial light sources used are divided into incandescent and discharge lamps.
Incandescent light sources use the phenomenon of sending light rays under the influence of high temperature. They are light bulbs …
It is sunlight, penetrating into the room through the windows, skylights and other transparent surfaces. Natural lighting can be side - through the window openings, upper - through skylights or upper-side. Daylight is beneficial for psychophysiological reasons, however big …
Lighting in gastronomy should provide adequate brightness in the rooms and be an element, influencing the aesthetics of the interior and the well-being of consumers. Lighting is closely related to the concept of visible light. Light is the part of electromagnetic waves with a length of 380÷770 …
Operating devices and electrical installations is associated with the risk of electric shock due to the wear and tear of the devices, unforeseen breakdowns or carelessness of the operator. The methods of protection against electric shock are specified in the ordinances of the former Min. Mining …
Depending on the environment, in which they work, installations must be resistant to various environmental influences, how: moisture, high temperature, pollination, corrosive fumes, etc.. The premises of catering establishments in the production part belong to, according to the classification of equipment construction regulations …
Electricity installations are divided into residential and industrial. Installations in small and medium-sized catering establishments and mass catering establishments are also considered residential installations..
Due to the nature of the receivers, installations can be divided into lighting and power installations. For installations …
Overcurrent protection devices are fuses or circuit breakers with triggers or overcurrent relays..
In the event of a short circuit with negligible impedance between the line conductor and the accessible conductive part or the protective conductor in the circuit, the protective device should automatically interrupt the power supply …
Automatic power off is a protection measure, wherein;
— primary protection is provided by primary insulation of live parts or by bulkheads or enclosures, and
- fault protection is provided by equipotential bonding and fault tripping.
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