Residential electrical design to NBR 5410 (Brazil)

In an NBR 5410 project, Avenler draws at 127/220 V with metric units and the "Brasil" symbol set, runs informative NBR checks (TUG, DR, TUE, DPS), builds the quadro de previsão de cargas and the memorial descritivo, and produces a bill of materials and a quote from the drawing. It is a design aid, not a permit document.

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Before you start: an aid, not a permit document

Avenler is a design aid, not a permit document. Compliance of a Brazilian design is decided by the responsible designer, the local utility and the text of the NBR 5410 in force, and the program's values must always be checked against the official edition. The NBR checks are informative only and have not been professionally reviewed: the program knows the common residential rules, not the whole standard, and it does not claim compliance with any standard.

The project region: NBR 5410

In the project settings, the Electrical standard system also offers NBR 5410 (Brasil). For the Brazilian market (pt-BR), a new project starts metric, per NBR 5410, with the "Brasil" symbol set and at 127/220 V; the voltage level can also be changed by hand. The voltage-drop limit under NBR is 4 %. The "Brasil" symbol set follows general practice and is not a standardized symbol set.

NBR checks and the quadro de previsão de cargas

In an NBR project the Check panel looks at the number of general-purpose outlets (TUG) per room, the ceiling lighting point and the separation of lighting and outlet circuits, and the board check applies the DR, TUE and DPS rules. The Boards page also shows a load estimate table (quadro de previsão de cargas), which can be printed as a sheet of the plan package.

Padrão de entrada: the utility connection data sheet

For the Brazilian market, the utility data sheet collects what the connection needs: the utility, the UC number (unidade consumidora), the supply category (single-, two- or three-phase), the installed power, the main breaker and the service conductor. The program does not suggest a category: the limits always come from the utility's own standard.

Memorial descritivo, ART and reports

In an NBR project the memorial descritivo (technical description) names NBR 5410 as the reference standard and includes the supply voltage and the DR and DPS solution. The ART number, the responsible designer's name and the CREA/CFT number must be filled in by hand. The documents also include Brazilian inspection (inspeção) and measurement (medição) report templates. These are templates: filling in and checking their content is the designer's responsibility.

Bill of materials and quote from the drawing

In an NBR project, too, the bill of materials comes from the drawing and the quote is built from the takeoff. The steps are covered in the NBR part of the Design to NEC chapter, and the standards references are on the standards page.

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