Circuit breaker on a single-line diagram: what is its letter designation. Marking differential on a circuit diagram. The graphic designation of the RCD in the diagram.

Machine selection by load power: calculation of power consumption. Why do we need circuit breakers and what is the danger of a cable mismatching the network load. How to calculate the rating of a circuit breaker.

Who should change the electric meter: in a multi-storey building and on the landing. Who pays for the replacement of the electricity meter in a privatized apartment. At whose expense the broken electricity meter changes.

Three-phase transformer: wiring diagram and methods of connecting the windings. How to connect a three-phase transformer to a single-phase network. Three-phase transformer connections. Losses and efficiency of a 3-phase transformer.

SMD LEDs: specifications and appearance, features and applications. How to independently decipher the marking of SMD LEDs. The influence of the size of SMD LEDs on their properties. Sizes of SMD LEDs.

Socket with a switch in one housing: device and varieties. Advantages and disadvantages of sockets combined with switches. How to connect a switch block with a socket in one housing. Wiring diagram for a double outlet with a switch in one housing.

How to connect the outlet from the switch: connection procedure. Is it possible to connect the outlet from the switch. How to make a socket and a switch from a switch. How to connect the switch from the outlet.

Grounding terminal: areas of application, selection criteria and terminal design. How to choose the grounding terminals: clamping, threaded, magnetic and instrument varieties. Terminals for grounding wire trays.

Do-it-yourself grounding in a private house: installation procedure and necessary tools. Why do you need grounding in a private house. Dimensions of the ground loop for a private house. As a grounding scheme, it is better to choose for a private house.

What is a differential automaton and how does it work. How to choose a place to install a residual current circuit breaker. Varieties of differential automata. The device of a circuit breaker with differential protection.

16 amp machine: features and scope of the machine. Rated current and current limit class of automatic 16-amp circuit breakers. How many kilowatts a 16 amp machine can withstand.