Underfloor heating machines selection and installation
The device has a light indicator: green - "thermostat on", red - "thermostat off". Temperature sensor: floor, for measuring the floor temperature, cable 4 m, with the possibility of extension up to 10 m. External control: provided, can be controlled by an external relay starter. Temperature reduction function: provided. The package includes a thermostat, a decorative overlay, a decorative frame, a separate terminal for grounding, a floor temperature sensor, instructions for installing a thermostat. When installing the thermostat, make sure that the heating floor power load does not exceed the maximum thermostat current power of 16A, approximately 3.5 kW in power.
Grounding arrangement
Building with many apartments
If this is not a modern building, then rather, a grounding system of the TN-C type was used during the construction of the house. This type provides for the grouping of the neutral and ground wires throughout the electrical circuit.
Despite the fact that such an arrangement provides protection against electric shock, injury can still be obtained. This happens when the neutral wire breaks, based on this, the phase voltage is immediately triggered.
The highest protective degree can be provided by the TN-S discharge system, which is widely used in today's construction. The scheme provides for the division of zero and ground throughout the entire electrical circuit. Moreover, additional security is added by the fact that the latter penetrates into the ground on the territory of the transformer substation.
When heating component is equipped with a metal sheath, it must be connected to the PE busbar. This is done through the connection to the outlet itself or directly on the shield itself.
PE busbar for grounding
If there is no protective shell in the design of the heating element, then it is better to lay a metal mesh on top of the heated floor surface, which will later be fixed to a suitable tire.
private house
In practical terms, the TN-C system is popular, in other words, it is implemented using 2 wires: phase (L) and a worker with a combination of zero (PEN).
Thanks to this, when arranging a warm floor with underfloor heating grounding must be installed using an independent circuit. It is a horizontal and vertical earthing, driven into the ground.
If grounding is prepared through the shield body, then in this case it is recommended to install a residual current device as an additional means of electrical protection.
RCD
Installed directly in the distribution box. A specialized wire is connected from the body of the electric element to the ground bus. As mentioned before, in the absence of a protection shell, a metal mesh is installed, which must be energize into the overall system and, based on this, connect to the bus.
Sometimes there are situations when, with the grounding installed, there are still alternating current leaks. Then, in a very short time, it is necessary to determine the point of the accident using specialized measuring instruments and completely localize it. For a real landscaping of a spectacularly functioning ground, there are ready-made kits on sale that include everything you need for installation.
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How to properly ground
Although underfloor heating is easy to install, many people may have difficulty grounding it. This is due to the fact that many manufacturers do not provide for the installation of such a system in order to save materials or maximize the efficiency of floor heat transfer.Therefore, in the range of the medium and low price categories, there is no talk at all about grounding, or just a few suggestions are mentioned on how to connect the cable to the control unit.
In the electrical system of underfloor heating, an electrical protection device is included in the circuit, which should turn off the current supply. However, if it fails, repairs will be required later, which will be quite expensive. Accordingly, the problem remains unresolved and floors can pose a risk to human health. Therefore, it is necessary to modify the electrical circuit of underfloor heating a little on your own.
The infrared warm floor can be grounded in the following way: around the perimeter of each of the installed mats, glue foil tape, the end of which, at the point of connection to the control unit, connect to the busbar or ground wire using a rivet or clamp. Thus, equalization of the electrical potential will be achieved through the use of a screen, which, due to the small surface area, will not reduce the power of thermal dissipation in any way. To protect it from damage, glue a polyvinyl film on top.
Safety Tips
- It is forbidden to overlap the infrared mats, as when turned on, a short circuit or breakdown may occur due to overheating of the film on which the heating elements are located.
- Laying is carried out with a slight indentation from the walls to prevent overheating of finishing materials and the occurrence of ignition.
- It is strictly forbidden to fasten the film to the subfloor with self-tapping screws or nails. The same applies to the method of fixing the floor covering.
- At the connection points with cables, it is necessary to install not only an electrically insulating film, but also lay the connection points with a heat insulator. The extreme heating element at the terminal contacts must be cut off and intended for insulation.
- It is not allowed to use the film on a section longer than 15 m, since the readings of the temperature sensor may not reflect the real situation and overheating will most likely occur, up to damage to the floor sections.
- The end parts of the mats at the locations of the copper busbars should be insulated with silicone sealant or electrical tape so that in case of water ingress there is no electric shock to exposed parts of the body.
- All wiring in the room must be laid at a safe distance from the heaters to prevent melting of the insulation and the occurrence of a short circuit.
Conclusion
When installing underfloor heating, first of all, a high level of safety for operation should be ensured. Therefore, if the manufacturer attaches instructions for performing grounding, then you should definitely use it, otherwise, do it yourself.
Main function
When equipping underfloor heating most prefer electrical systems. However, like any other device that works from a socket, such a floor must be equipped with an important practical element - this warm grounding gender.
A cable or film heating system is capable of quickly, effectively and equally heating not only the floor itself, but also the objects around it. But in order to take full advantage of all these good qualities, the system must be properly equipped so that it not only functions correctly, but also does not pose a danger.
Thanks to this, it is not necessary to actually check whether a heated floor can shock, it is best to initially calculate a good groundingwithout thinking about whether it is in the first place.
If this is not done, for example, in a bathroom that stands out from the rest of the rooms with high moisture criteria, then in case of emergency damage to the film or cable, you can quite easily feel how it beats with electricity by touching some metal part, the body of the washing machine or or just to the pipe.
If there is a grounding device, the dangerous part of the alternating current will freely go through the ground, thus protecting the people present from electrical injury. Due to the fact that most manufacturers of underfloor heating use a wire from a residential ground as a heating element, it remains only to make a competent connection to strictly marking compliance (N-zero, L-phase and PE-ground cable).
Expert answers
Andrey:
cover with aluminum foil and ground it.
Technical Director:
Phase-zero in the floor is important? Swap and check.
Vladimir:
no way. how many of them were laid, never in the project, nor in the technical conditions of grounding, did I ever meet the MATS of the warm floor themselves. ground the control unit - this will be enough
Gentleman:
try first to swap the neutral and phase wires on the floors and on the water heater ....
Alexander Ulyankin:
Switch off (from the outlet) and check for LEAKAGE of the underfloor heating. . Sense to ground him, his insulation is clearly broken. If there is a leak and something not to be redone, an isolation transformer (of appropriate power) can be used.
andrey kashirin:
what the heck…. and the house itself and the incoming pipes are grounded?? Potentials then equalized???? is there an ouzo?? maybe the boiler is pierced on the body?
Liver:
it was necessary to lay a reinforcing mesh and ground it.
Mikhail Levin:
then grab it and kill the fuck
ZDR:
During the first thunderstorm, lightning strikes!
*^*Chizhik-Pyzhik from Fontanka*^*:
It will electrocute you when you touch it.
Fear:
nothing is important to him and do not touch the battery right away, for example
Roman Abrashkin:
It looks like the design of the heater is designed so that the conductive parts are located close to the case and at the slightest deformation, the phase can get on the case.
socks victor:
nothing dangerous will happen.
Emil Rudenko:
you are some kind of freaks ————- we have 80% of the country without grounding ITS JUST NOT
igor:
First, buy white slippers for your mother-in-law, and then ask her to touch her!
Roman Volodin:
if the insulation is broken, the phase can get on the metal case and then it will gouge when touched
MwenMas:
If this is a radiator that heats the room, and not the one that heats the water in the bathroom, then it is possible without grounding
It is only important that it is not possible to simultaneously touch its body and something grounded (heating battery, gas, water pipe, metal building structure)
Vasily Cook:
Nothing will happen ... If it strikes at itself, then it will shandarhnet, when it happens, xs, maybe never, maybe tomorrow)))
Sergei Miletsky:
Grounding is necessary for safety purposes, if the phase short-circuits to the case, then, consequently, to the ground, which will lead to the operation of protective equipment such as fuses, circuit breakers or RCDs. If you do not make grounding, there is a possibility of electric shock if the heater malfunctions. Although in Russia we usually don’t bother with such trifles in everyday life.
Gregory:
Electrical installations are grounded (and an electric heater is also an electrical installation) by connecting this electrical installation to a ground loop made by an openly laid metal bus along the internal or external walls of the building, connected to a ground electrode (metal structures buried in the ground).
As a rule, zeroing is used in everyday life (connection of a protective conductor to the body of the electrical installation). To do this, there must be an appropriate three-wire wiring, plugs and sockets with three pins (with a neutral contact).
Aleksandra Kashenchuk:
Grounding is a must! Good day! Most recently, I turned to the well-known company LenProjectStroy LLC in St. Petersburg. We urgently needed a service to measure the ground resistance. I called the company, they quickly contacted me and the guys came. Everything was measured quickly and efficiently, paperwork was drawn up. The service of measuring the resistance of grounding devices costs (1 circuit) - 500 rubles. It worked out okay. I can share with anyone who is looking for help in electrical and electrical work with a link to the company's website: lenproektstroy / uslugi They also offer other types of services: coordination and development of power supply projects, electrical measuring work, certificates of admission, insulation measurements; electric installation work; we are engaged in the design of electrical networks up to 110 kV and relay protection; design of water supply and sewerage; providing objects with power supply; search for a damaged cable, repair of damage; registration of electrical laboratories; admission to the operation of the electrical installation; City of St. Petersburg!
Grigory Kovalenko:
We invite managers, engineers, power engineers, foremen and everyone who is responsible for the areas of energy and electrics to cooperate. We offer favorable conditions for cooperation. You can discover the possibility of ADDITIONAL EARNINGS and establishing business relationships. (nemlab)
Grigory Bergman:
Hmm, here, too, it is written to ground before turning on. I wanted to make a circuit, everything was as it should be, but then I found out that in winter the grounding in Siberia does not work, as the ground freezes. And the use of electrical appliances is necessary only in winter in the garage, that's all the answers
Electric underfloor heating installation rules
Thermoregulators for underfloor heating EKF PROxima are designed to control cable systems of electric heating. Thermoregulators maintain a comfortable temperature of the heated surface and provide rational energy consumption. The EKF range includes a mechanical and programmable electronic thermostat. The electronic thermostat is designed for manual, automatic and programmable control of electric heating cable systems.
The weekly programming function allows you to divide the day into six periods and automatically maintain a different temperature in each period. The mechanical thermostat can operate in different modes, thanks to the switch on the back of the thermostat.
The model is not inferior in quality to the electronic analogue, but has a less wide functionality. The mat is a heating section made of a shielded two-core cable, fixed on a special mesh for ease and convenience of installation. There is no need to calculate the number of turns and wire laying pitch - everything is ready for installation.
The heating mats are designed to operate from a household electrical network with a voltage of V and a frequency of 50 Hz. All heating mats have a standard width of 0.5 m. The rated operating current of the RCD does not exceed 30 mA. Warm floor. Specifications Specifications. Overall and installation dimensions. Passport Temperature controller mtt-1 Size: 1, Passport Temperature controller ett-1 Size: Passport Heating mats Size: Certificate Size: Show filters.
Base price 2 rubles. The recommended retail price is 2 rubles. Your price is 2 rubles. Two-core heating mat "Comfort" 1.5 sq. The base price is 3 rubles. Two-core heating mat "Comfort" 2 sq. Two-core heating mat "Comfort" 3 sq. The recommended retail price is 3 rubles. The base price is 4 rubles. Your price is 3 rubles.
Two-core heating mat "Comfort" 4 sq. The recommended retail price is 4 rubles. The base price is 6 rubles. Your price is 4 rubles. Two-core heating mat "Comfort" 5 sq. The recommended retail price is 5 rubles.
The base price is 7 rubles. Your price is 5 rubles. Two-core heating mat "Comfort" 6 sq. The recommended retail price is 6 rubles.The base price is 8 rubles. Your price is 6 rubles. All rights reserved.
Best Answers
Sergey S:
So what? All the requirements of this paragraph are legitimate and they apply to reconstructed and newly erected electrical installations. The installation of a warm floor is an additional stationary consumer of electricity and all the requirements of the PUE and other standards apply to it. But how to organize the DSUP is a serious question and using the "help of the audience" in such matters is extremely imprudent and dangerous ... An example is the second tip.
Yegorych:
1. If the elements of the warm floor have a metal sheath, then it (sheath) is connected to the PE busbar of the potential equalization system, or is connected to the PE busbar on the shield.2. If the heating elements of the underfloor heating do not have a protective sheath, then it is necessary to lay a metal mesh over the underfloor heating with its connection to the PE busbar. This work must be performed by an electrician with a group of at least 3.3. RCD is an additional means of protection and cannot replace the connection to the PE bus.4. It is forbidden to connect the protective sheath or the protective grid simply to a separate earthing conductor, it must be connected to a potential equalization system.
Andrey Volkov:
Well, now talk nonsense - just from the shield you need to throw a separate cable 3 by 2.5 sections - and you're done. or you can just donate a free socket for this cause - with grounding so that the main thing is it. He eats energy like a light bulb 60 watts. At the expense of a metal grid, you can’t do that - it will burn out in a year.
