IEC TR 60479-5-2007 cor1-2013 PDF

Full title and description

St IEC TR 60479-5:2007 Corrigendum 1 (2013) — Effects of current on human beings and livestock — Part 5: Touch voltage threshold values for physiological effects. This entry refers to the original Technical Report IEC TR 60479‑5:2007 (Ed. 1.0) together with Corrigendum 1 issued in July 2013 which updates/corrects parts of the 2007 publication.

Abstract

This technical report provides calculated touch‑voltage versus duration threshold combinations for physiological effects based on body impedance data and current thresholds given in IEC/TS 60479‑1. The report gives guidance on touch voltage limits for specified environmental and contact conditions (hand/foot, skin moisture, contact area) for 50/60 Hz sinusoidal AC and for DC, and presents uncertainties associated with the threshold values. The July 2013 corrigendum (Corr.1:2013) contains corrections and clarifications to the 2007 text and is included in the consolidated document.

General information

• Status: Published / valid (base Technical Report with Corrigendum 1 issued).
• Publication date: Base TR: 7 November 2007; Corrigendum 1 publication date: 11 July 2013.
• Publisher: International Electrotechnical Commission (IEC), prepared by TC 64 (Electrical installations and protection against electric shock).
• ICS / categories: 13.200 (Accident and disaster control); 29.020 (Electrical engineering in general).
• Edition / version: Edition 1.0 (2007) with Corrigendum 1 (2013) — often shown as IEC TR 60479‑5:2007/COR1:2013.
• Number of pages: Base TR: 113 pages; Corrigendum document: 1 page (corrigendum sheet).

Scope

The report supplies touch voltage‑duration combination threshold values for physiological effects of electrical current on humans and livestock. Thresholds are derived from body‑impedance models and current‑effect data (IEC/TS 60479‑1) and are intended as guidance for technical committees and standards writers when setting limits for permissible touch voltages and durations in different environmental/contact conditions. The TR limits its analysis to (i) 50/60 Hz sinusoidal alternating voltages without significant DC components and (ii) direct voltage without significant AC components.

Key topics and requirements

• Touch voltage versus duration threshold combinations for physiological effects (guidance values for shock severity).
• Body impedance models for different contact conditions (skin moisture, contact area, contact path — e.g., hand‑to‑hand, hand‑to‑foot).
• Distinction between AC (50/60 Hz) and DC effects and the conditions under which the TR applies.
• Uncertainty estimates associated with calculated threshold values and the recommended use of these values as guidance rather than prescriptive limits.
• Use as a reference for setting touch‑voltage limits in other standards and for risk assessment in electrical installations and LVDC applications.

Typical use and users

Used by IEC technical committees, national standards bodies, electrical safety engineers, designers of electrical installations and equipment, regulators, risk assessors and researchers concerned with protection against electric shock. The TR is primarily a guidance/reference document for standards development and safety assessment rather than a mandatory product certification specification.

Related standards

Closely related to IEC/TS 60479‑1 (Part 1: General aspects) and other parts of the IEC 60479 series (effects of current on human beings and livestock). Users often consult IEC 60479‑1 (latest edition) when applying the touch‑voltage thresholds in TR 60479‑5. The TR is intended to be used as guidance by technical committees when developing or updating protective measures in other standards.

Keywords

Touch voltage; threshold values; body impedance; electric shock; physiological effects; IEC TR 60479‑5; Corrigendum 2013; TC 64; electrical safety; LVDC.

FAQ

Q: What is this standard?

A: It is a Technical Report (IEC TR 60479‑5:2007) that provides calculated touch‑voltage versus duration threshold values for physiological effects of electrical current on humans and livestock, with Corrigendum 1 issued in July 2013.

Q: What does it cover?

A: It covers the derivation and presentation of touch voltage‑duration threshold combinations based on body impedance and current‑effect data (from IEC/TS 60479‑1). The TR addresses specific contact conditions and gives uncertainty estimates; it applies to 50/60 Hz sinusoidal AC (no significant DC component) and to DC (no significant AC component).

Q: Who typically uses it?

A: IEC technical committees, standards developers, electrical safety engineers, designers of installations and equipment, regulators and safety assessors who need authoritative guidance on touch‑voltage limits and shock‑severity thresholds.

Q: Is it current or superseded?

A: The base Technical Report was published in 2007 and corrected by Corrigendum 1 (July 2013). The consolidated TR with the corrigendum is shown by IEC product records as the published/corrected document; users should check the IEC webstore or national bodies for any later revisions or replacements. (IEC product listings show the TR and Corrigendum with stability information on the IEC pages.)

Q: Is it part of a series?

A: Yes — it is Part 5 of the IEC 60479 series ("Effects of current on human beings and livestock"); other parts (Part 1, Part 2, etc.) cover general aspects and special aspects and are commonly used together when assessing physiological effects of electrical current.

Q: What are the key keywords?

A: Touch voltage, body impedance, threshold values, electric shock, physiological effects, IEC TR 60479‑5, corr.1:2013, TC 64.