What it is based on
The summary of the standards the section works to is here so you can check us and answer why it is so. Details are in the sections above.
| What | Standard | How it is applied |
|---|---|---|
| GOST 21.210-2014 | sockets, switches, light fittings, panels and boxes use the standard's symbols | |
| GOST 21.608-2021, cl. 6.1.2, 6.1.3 | lighting and switches on one sheet Lighting and switches; sockets, tie-in and wiring on separate sheets (cl. 6.1.3 allows this for a large number of lines) | |
| GOST 21.608-2021, Table B.1, cl. 4 and 5 | link lines on the lighting sheet; C{n} at light fittings and sockets | |
| GOST 2.302 | auto takes the largest standard scale at which the plan fits on the sheet | |
| GOST R 50571.5.52-2011 (IEC 60364-5-52), Table B.52.2, B.52.4; temperature and grouping corrections: B.52.14, B.52.17 | circuit cable against the breaker rating; cable from the main distribution board against the main breaker (method B2) | |
| SP 256.1325800.2016, cl. 8.23; conductor resistance per GOST R 50571.5.52-2011, Annex G | lighting ≤ 3 %, everything else ≤ 4 % from the main distribution board; copper 0.0225, aluminium 0.036 Ω·mm²/m | |
| GOST 29322 | 230 / 400 V | |
| GOST IEC 60898-1 | instantaneous trip 3–5, 5–10, 10–20 In: tripping on a short circuit at the end of the line, motor starting; selectivity with the main breaker at 1.13 and 1.45 In | |
| GOST R 50571.4.43-2012, cl. 434.5.2 | k²S² not less than the breaker's I²t, if I²t is given | |
| GOST R 50571.5.53-2013, cl. 535.3 | incoming RCD: type S and leakage current not less than three times the circuit RCD currents | |
| PUE, 7th ed., cl. 7.1.83 | no more than a third of the RCD current; 0.4 mA per ampere of load and 10 µA per metre of phase conductor | |
| PUE, 7th ed., cl. 7.1.34 | cable from the main distribution board in aluminium from 16 mm² | |
| GOST R 50571.7.701-2013, cl. 701.415.1 (2024 ed.: cl. 701.4.1) | all circuits of such a room under a 30 mA RCD or RCBO; a separate line there with an RCBO | |
| GOST R 50571-7-753-2013 (IEC 60364-7-753) | thermostat on its own line under a 30 mA RCBO | |
| PUE, 7th ed., cl. 2.1.56–2.1.57 | the auto route keeps 10 cm from pipes and risers, 40 cm from gas | |
| SP 76.13330.2016 (update of SNiP 3.05.06-85), cl. 6.4.1.10 and 6.3.1.15 | 2 % of the route length (norm 1–2 %) and ends at devices: 50 mm plus the box depth, 150 mm at a light fitting | |
| GOST 21.501, SP 54 (floor height model) | cable rises and drops to devices, height of ceiling devices |
What the person sets, not the standard (the editor does not know this and does not make it up):
- starting currents of devices with a motor, device power ratings, demand factors;
- short-circuit current at the input, breaking capacity and I²t of the breakers from the datasheet and connection conditions;
- cable from the main distribution board and temperature along the route;
- spare space in the panel enclosure (20 % by default): a project setting; depth of the flush mounting boxes for the estimate;
- prices, brands and article numbers in the estimate.
What we do not check and why:
- selectivity in a short circuit more precisely than the limit of the main breaker's instantaneous trip: this needs the curves of a specific manufacturer;
- the width of the AFDD and of the changeover switch of a specific model: the catalogue has typical modules.