PUE vs IEC 60364: differences between Russian and European rules

PUE and IEC 60364 are close (PUE-7 harmonized), but differ: voltage drop, mandatory verification, bathroom zones, EU national codes.

Key differences

Parameter	Side 1	Side 2
Напряжение	230/400 В, 50 Гц	230/400 В, 50 Гц (одинаково)
УЗО	30 мА на розетки (7.1.79)	30 мА на розетки (411.3.3)
Падение напряжения	По расчёту; СП 256 — 5/8%	4% освещение / 8% остальные (525)
Проверки	Приёмка (гл. 1.8)	Первичная + периодическая (IEC 6)
Заземление	TN-C-S, 4 Ом	TN-S/TN-C-S; RA×Ia ≤ 50 В
Ванные	Зоны по СП 256	Зоны 0–3 (7-701)
Гармонизация	Своя терминология	ГОСТ Р 50571 = IEC 60364

Why they are close

PUE-7 (since 2002) was developed with IEC 60364 in mind; GOST R 50571 is the Russian adoption of IEC. Same earthing classification, 30 mA RCDs, bathroom zones.

Voltage drop

IEC: 4% lighting / 8% others (525); UK stricter (3/5%). PUE: by calculation; SP 256: 5/8%.

Verification

IEC 60364-6: initial + periodic checks (homes every 10 years in the UK). Russia: acceptance testing (1.8), no mandatory periodic checks for private housing.

EU national codes

HD 60364 + national: BS 7671, DIN VDE 0100, NF C 15-100, PN-HD 60364. Differences: sockets (type G), voltage drop, inspection periods.

Data is for reference. Final design decisions must follow current regulations and a qualified engineer.
All comparisons · World electrical installation rules