Where 30 mA
All socket circuits: per PUE 7.1.79 and IEC 60364-4-41. Also: bathrooms, kitchens, washing machines — groups with high humidity.
Where 10 mA
Bathrooms and children's rooms — 10 mA protects at the level of touching with wet hands. More sensitive, more expensive.
Fire protection 100 mA
The input fire RCD (100-300 mA) protects the wiring in the walls. Required for wooden houses and cottages per IEC 60364-4-42.
Type A vs AC
Type A detects pulsed DC — for washing machines, induction hobs, LED drives. Type AC only AC. In new projects, GorkyCAD selects Type A for all socket groups.
RCBO or RCD+MCB?
RCBO saves space in the panel but costs more. With RCD+MCB, a trip of the group does not turn off everything. GorkyCAD offers both and compares the price.
Common mistakes
One RCD for the whole apartment (trip turns off everything); no RCD on the boiler circuit; Type AC in a bathroom — all found by the 25 checks.
Frequently asked questions
Yes, all articles and calculators are completely free.
The site offers 21 free calculators: cable sizing, breakers, RCD, voltage drop and more.
In GorkyCAD Pro: plans, panels, calculations and a PDF set for free.
Write to hello@gorkycad.pro — specialists will review and correct it.