DIN 43671 1975-12 PDF

Full title and description

DIN 43671:1975-12 — Stromschienen aus Kupfer; Bemessung für Dauerstrom (English title: Copper bus bars — design for continuous current). The standard specifies principles, dimensioning data and allowable continuous currents for copper bus bars used in electrical installations and switchgear assemblies.

Abstract

This German national standard (DIN) provides tables, calculation guidance and dimensional information to determine admissible continuous currents and to size copper bus bars for continuous service. It is published in German (original language) and is commonly offered by standards distributors in a 9‑page document from December 1975.

General information

• Status: Published; listed as current in standards distribution catalogues (no replacement or withdrawal entry found in distributor metadata as of 23 February 2026).
• Publication date: December 1975 (1975-12).
• Publisher: DIN — Deutsches Institut für Normung (German Institute for Standardization).
• ICS / categories: 29.060.10 (wires / conductors — electrical engineering).
• Edition / version: First published edition (1975-12).
• Number of pages: 9 pages (typical distribution metadata lists 9 pages).

Scope

Specifies methods and data for determining admissible continuous currents and recommended dimensions (cross‑sectional sizes and geometry) for copper bus bars intended for continuous current service in electrical installations and related equipment. The standard is focused on copper conductors used as busbars rather than insulated flexible conductors, and is intended to support designers and manufacturers in selecting busbar dimensions that meet continuous current and temperature‑rise requirements.

Key topics and requirements

• Definition and scope for copper bus bars used under continuous current conditions.
• Tables or calculation rules for admissible continuous current (ampacity) related to busbar cross‑section and geometry.
• Recommended dimensional data (width, thickness, and cross‑sectional area) for standard busbar sizes for common current ratings.
• Material specification references (copper as conductor) and general installation considerations affecting temperature rise and current carrying capacity.
• Guidance aimed at ensuring continuous operation within safe thermal limits.

Typical use and users

Applied by electrical engineers, switchgear and panel builders, busbar manufacturers, installation designers and standards departments when sizing copper bus bars for distribution boards, switchgear assemblies and industrial power distribution systems. Also used by national standards bodies and technical libraries as a reference.

Related standards

DIN 43671 is related to other national and international standards covering conductors, busbar systems and low‑voltage switchgear and controlgear assemblies. It has been published in national distribution channels and is also offered in adopted ÖNORM form in Austria (ÖNORM DIN 43671). Users should consult current DIN/EN/IEC standards on switchgear assemblies and conductor sizing for equipment‑level requirements and any more recent harmonized documents.

Keywords

DIN 43671, copper bus bars, busbars, continuous current, admissible current, ampacity, conductor sizing, busbar dimensions, Stromschienen, Bemessung für Dauerstrom.

FAQ

Q: What is this standard?

A: DIN 43671:1975-12 is a German national standard titled "Stromschienen aus Kupfer; Bemessung für Dauerstrom" (Copper bus bars — design for continuous current). It provides dimensioning and current‑rating information for copper bus bars.

Q: What does it cover?

A: It covers methods, tables and dimensional guidance to determine admissible continuous currents (ampacity) and recommended busbar sizes for continuous service, focusing specifically on copper busbar configurations.

Q: Who typically uses it?

A: Electrical designers, switchgear and panel manufacturers, busbar fabricators and installation engineers use this standard for selecting appropriate copper busbar dimensions and ratings. Standards libraries and national bodies also distribute it.

Q: Is it current or superseded?

A: Searches of major standards distributors and DIN metadata show the 1975 edition listed as the published document with no replacement or withdrawal entry indicated; it is therefore commonly listed as current in distributor catalogues. Users should verify with DIN or their national standards body for any newer DIN/EN/IEC documents or amendments before use — the status statement here reflects distributor listings as of 23 February 2026.

Q: Is it part of a series?

A: DIN 43671 is a standalone DIN addressing copper busbar dimensioning, though it has been made available in some national adoption catalogues (for example ÖNORM DIN 43671). Designers commonly use it together with other DIN/EN/IEC standards on conductors and switchgear assemblies.

Q: What are the key keywords?

A: Copper bus bars; continuous current; ampacity; busbar dimensions; Stromschienen; Bemessung; DIN 43671.