NBR 5410 (Brazil) Low-voltage installations — translation

Clause-by-clause translation of Brazilian NBR 5410:2004: 30 mA IDR in wet areas (6.4.3), socket quantities (9.5), bathroom zones, NBR 14136 sockets.

Document

Document	NBR 5410 (Brazil) Low-voltage installations
Edition	2004 (изм. 2008/2019)
Status	Current (Brazil)
Issued by	ABNT (Brazilian Association of Technical Standards)
Applies to	Brazilian low-voltage building installations: protection, infrastructure, socket counts, 30 mA IDR

Document structure

№	Chapter / section
4	Protection against electric shock
5	Protection against thermal effects
6	Protection against overcurrent
9	Installation infrastructure: socket quantities
9.2	Bathrooms and wet areas

Overview

NBR 5410 — Brazil's main low-voltage standard (up to 1000 V AC), based on IEC 60364 with Brazilian specifics: 127/220 V 60 Hz, NBR 14136 sockets (type N), mandatory IDR in wet areas.

Shock protection (4–5)

IEC 60364-4-41 measures: automatic disconnection, double insulation, SELV/PELV.

6.4.3 30 mA IDR mandatory: bathroom sockets, outdoor sockets, kitchens/laundries, outdoor equipment circuits. Fire IDR 300 mA at the intake.

Socket quantities (9.5)

9.5.2.2 Living rooms: one per 5 m of perimeter; kitchens: one per 3.5 m (min 3); bathroom: min one near the sink; 20 A sockets for AC units and appliances.

Bathrooms (9.2)

Zones 1–2; sockets only in zone 2 and beyond, ≥ 0.6 m from zone 1, on 30 mA IDR or SELV; IPX4 in zones 1–2, IPX7 in the shower.

Wiring

6.2.4 Minimum sections: lighting 1.5 mm², sockets 2.5 mm²; 6.2.5 voltage drop ≤ 4% lighting / 7% power.

Data is for reference. Final design decisions must follow current regulations and a qualified engineer.
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