Why is the LED spot on when the switch is off?
When the light is off, several LED spots dimly lit. I installed a resistor in parallel to one of them - generally stopped turning on. What to do?
How to determine the type of RCD electronic or electromechanical?
RCD legrand 40A I 30mA series 089 94 - what type of protection does it have: electronic or electromechanical? How to check and determine the type of RCD if there is no designation?
How to choose an automatic machine and RCD for a warm floor?
There is a floor heating SpyHeat Economy SH-450W. Tell me what section of cable cores to use to connect it, as well as the ratings of the machine and RCD.
What power supply is needed for an electric corkscrew?
The power supply on an electric corkscrew has failed. Its characteristics are 3.6V, 80 mA. I can not find a replacement. What to do? Maybe there are universal bp?
Why does the difavtomat work when connecting an LED chandelier?
Everything worked well before we tried to connect the LED chandeliers. When grounding is connected to the chandelier, a difavtomat works. Where to look for a problem?
How to route a cable to a bathroom for lighting and sockets?
How to lay the cable in the bathroom? How to connect the switch - to phase or to zero? How many cables to start - 1 common or 2 separately?
Cable cross section for connecting a 5 kW water heater and sockets
Is there a 5 kW instantaneous water heater, is it correct to connect it with a 2.5 mm2 cable through a 25A automatic machine? Can I connect outlets to this line?
Lamps do not go out due to increased humidity in the bathroom
They installed LED lights, after taking a shower, they noticed that they continued to burn weakly for a long time. If you didn’t take a shower, they turn off immediately. What to do?
RD 34.20.185-94: Instructions for the design of urban electrical networks
Status of RD 34.20.185-94 for 2019. Instructions for the design of urban electrical networks. Download the document in PDF format on the our.electricianexp website.
BCH 59-88: Electrical equipment for residential and public buildings. Design Standards.
BCH status 59-88 for 2019, the current version of the document. Electrical equipment of residential and public buildings. Design Standards. Download BCH 59-88 in PDF.
What is EMF - explanation in simple words
What is EMF in physics, chemistry, electrical engineering and how it arises. Definition of concepts and formulas. The difference between EMF and voltage in an electric circuit.
How to replace fluorescent lamps with LED lamps in a chandelier?
How to replace 4 fluorescent lamps with a 2G11 socket in the chandelier with similar LED lamps. Tell me their connection diagram?
Why does an RCD work when the electric stove is turned on?
All consumers in the house are disconnected. When the electric stove is turned on at full power, the RCD is disconnected after 20 seconds. There are no problems at low power. What is the reason?
MKL-5000 microphone wiring diagram
How many cores should be in the microphone wire - 5 or 6? According to scheme 6, but the manufacturer indicated that 5. Do I need to use a 5 wire cord with a braid?
What cable is needed for a 5 kW water heater?
The cross-section of the cable 4 mm² is indicated on the water heater, the question is: for each core or common? Which cable to choose for connecting a water heater?
What to do if an RCD is triggered by lighting in several rooms?
I installed an RCD on the input, but it works for no apparent reason when the lighting is turned on. When you turn on the electric stove, heaters, etc. does not work.
What voltage stabilizer to choose if the voltage in the network reaches 370 V?
Which stabilizer to put? The voltage in the sockets is 275 V and during welding reaches 370 V. The equipment on which you need to install consumes no more than 5 kW.
What is a photo relay for street lighting and how does it work
Photocells are used to automatically turn on and off the lighting. We will figure out how the photo relay works, what it consists of and what types of light sensors are.
Is it possible to use electricity after flooding?
The neighbors flooded, broke the DHW pipe. During the flood, the lamps in the chandelier themselves turned on. Is it possible to use electrical appliances or do I have to wait until everything dries?
What sockets abroad - an overview of 14 types from around the world
Sockets in different countries of the world, their compatibility with European plugs. Photos of different types of sockets with names. Important information.
Typical schemes and methods for starting synchronous motors
Typical schemes for starting synchronous motors. Asynchronous start, frequency, by means of an accelerating motor. What devices are used for soft start.
Can I connect the LED strip power supply to the light switch?
I have 6 LED spotlights. I want to connect a power supply for the LED strip to their switch. Can this be done?
5-way chandelier does not turn on correctly after replacement
Electrician installed a 5-horn chandelier. But when you press the first key separately, 3 horns turn on, the second - 2, and when both keys - anyway 3. What should I do?
What is a voltage regulator and what is it for?
What is a voltage stabilizer, why is it needed and where is it used. The principle of operation of voltage stabilizers of relay, servo-drive and inverter type.
