According to the REBT the following devices are required in any residential electrical installation: Overvoltage protection devices, compulsorily, in compliance with ITC-BT-19. Overvoltage protection devices, compulsorily, in compliance with ITC-BT-23. Miniature Circuit Breakers (MCB), with multi-pole tripping and manual reset, featuring overcurrent and overvoltage protection functions, for every circuit of the residential installation None.
Conductor cables need to be easily identifiable. In this respect: the neutral conductor will be light blue coloured the protection conductor (PE) will be identified with blue colour phase conductors will be identified with either brown, black or yellow-green colour a and c are correct.
Conductor cables will be: Made of copper or aluminium, properly insulated and with 450/750 V rated voltage, maximum Made of copper, duly insulated and with rated voltage of at least 230 V Made of copper, duly insulated and featuring a rated voltage of 450/750 V, at least.
Conductors' cross-section will be determined by the type of circuit they belong to; thus: C2 conductors have 1,5mm2 cross-section C2 conductors have 2,5mm2 cross-section C2 conductors' cross-section is 4 mm2 because the microwave oven could be plugged None.
Generally speaking, conductors' cross section will depend upon the circuit considered; thus: C1 conductors have 1mm2 cross-section C1 conductors have 1,5mm2 cross-section C1 conductors have 2,5mm2 cross-section C1 conductors need to have a suitable cross-section, typically 1,5 mm2 and up to 2,5 mm2.
High electrification level: Is proposed as the minimum system Is considered in homes where no significant number of electric home appliances, no electric heating ora ir-conditioning systems are foreseen Is envisaged in homes with over160 m2 useful area None.
If a power control breaker is single-pole type: it trips the phase conductor it trips the neutral conductor it trips the protection conductor (PE) It is compulsory that every power control breaker is multi-pole type, that is, it will trip both phase and neutral conductors.
In basic-electrification-level homes, the installation: Will have two, four or five circuits Will consist of at least five circuits Can have up to 12 circuits Will not necessarily include a residual current device, as it is enough to use a power control breaker.
In those cases where a high electrification level is envisaged: Just one air-conditioning circuit can be installed if no electric heating is utilised All twelve (12) circuits will be compulsorily installed At least 6 circuits must be installed None.
Please indicate the right answer: The different protection and control devices of a residential installation are located in the final switchboard In a residential installation the final switchboard includes a residual current device for each circuit In a residential installation, the final switchboard includes a power control breaker for each of the circuits None.
Please indicate the wrong answer: The same neutral conductor cannot be used for several circuits All socket-outlets within the same room mustn't be connected to the same phase Operation buttons of devices such as breakers, mechanisms, etc, which are installed in kitchen rooms, bathrooms, drying areas or, as a rule, wet or humid areas, as well as those rooms with conductor walls and floors, will be made of insulating materials The most utilised system is that of embedded installations with insulated cables within flexible tube.
Please mark the correct statement. In high-electrification-level homes Up to 12 circuits can be installed Just one residual current device will be installed The domestic installation consists of at least 5 circuits All answers are true.
Please mark the right answer. The case of the power control breaker: Is located after (downstream) the other protection and control devices Is connected in parallel with all the circuits Must be muti-pole type Must be sealable.
The circuit C4 for washing machine, dishwasher and electric water-heater: May feature 16A-rated current Schuko-type socket-outlets, together with 16A-rated current fuses, 2,5 mm2 cross-section conductors and a miniature circuit breaker (MCB) of 10 A May feature 16A-rated current Schuko-type socket-outlets, together with 16A-rated current fuses, 2,5 mm2 cross-section conductors and no 20A miniature circuit breaker (MCB), as it is not needed Will typically include a 20A rated current MCB for protecting all the three elements, its conductor cables will have 4 mm2 cross section and its socket-outlets will have rated current of 20 A Can be accomplished by using three independent 10A MCBs, 2,5 mm2 cross-section conductors and 16 A socket-outlets.
The power control breaker is: A device for ensuring that the power actually consumed by any consumer doesn't exceed the contracted power A device exclusively intended for protection A device for protecting individuals A device for measuring contracted power and protecting the home installation.
The power tiers scheduled for single-phase supplies are: 5,750 W and 7,360 W for basic electrification level and 9,200 W, 11,500 W and 14,490 W for high electrification level 5,500 W and 7,360 W for basic electrification level and 9,200 W, 11,500 W and 14,490 W for high electrification level 5,750 W and 9,200 W for basic electrification level and 11,500 W and 14,490 W for high electrification level None.
The REBT enforces the installation of at least: a General Circuit Breaker, multi-pole type, with manual resetting, featuring overload and overcurrent protection functions, and a minimal rated current of 25 A, dependent on the power control breaker and replaceable by it a General Circuit Breaker, multi-pole type, with manual resetting, featuring overload and overcurrent protection functions and rated current of at least 25 A a multi-pole Circuit Breaker with manual resetting, featuring overload and overcurrent protection functions and rated current of at least 25 A None.
Those Miniature Circuit Breakers (MCB) utilised in the different circuits of a domestic installation will feature the following minimum rated current : C1 and C5 10 A, C2 and C4 20 A and C3 25 A 10Hz C1 10 A, C2 and C5 16 A, C3 25 A and C4 20 A. 16 A for all of them, except C3, featuring 25 A, as it is destined for the electric oven None.
Which of the following statements about the residual current device is false? Its maximum sensitivity is 30 mA At least one residual current device is to be installed per every five circuits It is installed by the electric utility None.
Which of the following statements is false? Overvoltage protection devices, if needed, are to be installed in compliance with the ITC-BT-19 standard Overvoltage protection devices are compulsory, in compliance with the ITC-BT-23 standard Overvoltage protection devices, if needed, are to be installed in compliance with the ITC-BT-23 standard a and c are correct.
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