Hello.
I am an electrical engineer and I have SEP "E" and "D" qualification certificates
Fully except for electrolysis equipment. (including control and measurement).
A friend asked me to perform protective measurements for him, including the electrical installation acceptance protocol, with a subsequent entry in the construction book.
In this regard, I have a few questions.
The installation of a single-family house is made without a box, without a lightning protection system and with a 24V power supply (lighting) for the bathroom.
The measurements I would like to take are:
* Earth resistance measurement.
Here, the thing is probably the fastest, the foundation grounding with the exit of the FeZn 25x4 mm tape.
Three-wire measurement method.
* Measurement of continuity of protective conductors.
Here, too, the matter is not difficult. From the main PE bus of the switching station to all pins of sockets and PE terminals of lighting sources.
* Short circuit loop impedance measurement (checking the efficiency of the SWZ).
Measurement on sockets is quick, on lighting fixtures a bit more troublesome.
In fact, probably every circuit is powered by residual current devices (except for 24V power supply for lighting in the bathroom).
So I will enter the required impedance in the table with classic overcurrent protection with a residual current device (assuming 5x I?N).
It will be more troublesome when measuring lighting fixtures, you will have to disconnect everything from the light source.
* Measurement of the insulation resistance of wires.
I do not see the problem to the sockets, I disconnect L and N from the RCD, bridge them together and measure to PE. (I remember somewhere from the SEP course that there is no need to measure the insulation resistance L to PE and N to PE separately, because if there is a short circuit L and N and the short circuit loop is ok, the protection will work anyway in the right time).
But I can see the problem with lighting fixtures.
Disassembly of each luminaire and enclosed installation connectors for luminaires.
* WLZ measurement
Measurements from the connector to the main switchboard of the building.
Measurement of insulation resistance with a test voltage of 2500V.
Also, there are a lot of measurements and a lot of time is also spent on it (house about 200m ^ 2)).
Finally, some paperwork.
Finally, I prepare an electrical installation acceptance report (1 document) and reports of the above-mentioned measurements, stapled together (2 document).
I have attached the documents in the attachment, they are not the most recent, but can they be legally used for the protocols?
Has something changed in the scope of taking protective measurements, or can it be performed by 1 person and the same person must sign it?
I am an electrical engineer and I have SEP "E" and "D" qualification certificates
Fully except for electrolysis equipment. (including control and measurement).
A friend asked me to perform protective measurements for him, including the electrical installation acceptance protocol, with a subsequent entry in the construction book.
In this regard, I have a few questions.
The installation of a single-family house is made without a box, without a lightning protection system and with a 24V power supply (lighting) for the bathroom.
The measurements I would like to take are:
* Earth resistance measurement.
Here, the thing is probably the fastest, the foundation grounding with the exit of the FeZn 25x4 mm tape.
Three-wire measurement method.
* Measurement of continuity of protective conductors.
Here, too, the matter is not difficult. From the main PE bus of the switching station to all pins of sockets and PE terminals of lighting sources.
* Short circuit loop impedance measurement (checking the efficiency of the SWZ).
Measurement on sockets is quick, on lighting fixtures a bit more troublesome.
In fact, probably every circuit is powered by residual current devices (except for 24V power supply for lighting in the bathroom).
So I will enter the required impedance in the table with classic overcurrent protection with a residual current device (assuming 5x I?N).
It will be more troublesome when measuring lighting fixtures, you will have to disconnect everything from the light source.
* Measurement of the insulation resistance of wires.
I do not see the problem to the sockets, I disconnect L and N from the RCD, bridge them together and measure to PE. (I remember somewhere from the SEP course that there is no need to measure the insulation resistance L to PE and N to PE separately, because if there is a short circuit L and N and the short circuit loop is ok, the protection will work anyway in the right time).
But I can see the problem with lighting fixtures.
Disassembly of each luminaire and enclosed installation connectors for luminaires.
* WLZ measurement
Measurements from the connector to the main switchboard of the building.
Measurement of insulation resistance with a test voltage of 2500V.
Also, there are a lot of measurements and a lot of time is also spent on it (house about 200m ^ 2)).
Finally, some paperwork.
Finally, I prepare an electrical installation acceptance report (1 document) and reports of the above-mentioned measurements, stapled together (2 document).
I have attached the documents in the attachment, they are not the most recent, but can they be legally used for the protocols?
Has something changed in the scope of taking protective measurements, or can it be performed by 1 person and the same person must sign it?
