IEC TR 63381:2025

IEC TR 63381 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Application of IEC 60335‑2‑27 for field inspections of UV emission of UV
appliances
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IEC TR 63381 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Application of IEC 60335‑2‑27 for field inspections of UV emission of UV

appliances
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 13.120; 97.170 ISBN 978-2-8327-0274-1

– 2 – IEC TR 63381:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General conditions for the tests . 7
4.1 Paperwork check . 8
4.1.1 UV fluorescent lamps . 8
4.1.2 Other lamps . 8
4.1.3 Filters . 8
4.1.4 Ballasts . 8
4.1.5 Reflectors . 8
4.1.6 Classification . 8
4.2 On-site survey with hand-held UV radiometer . 8
4.2.1 Hand-held UV radiometer survey . 8
4.2.2 Classification . 9
4.3 On-site measurement with spectro-radiometer . 9
4.3.1 Spectro-radiometer measurements . 9
4.3.2 Classification . 9
4.4 Laboratory test . 9
4.4.1 Laboratory test method . 9
4.4.2 Classification . 9
5 Classification . 9
Annex A (informative) Guideline for the use of handheld UV radiometer . 10
Annex B (informative) Guideline for rounding of radiation measurements . 11
Annex C (informative) Example of requirements to laboratories for on-site field
measurements . 12
Bibliography . 13

Table B.1 – Limits of effective irradiance and their rounding . 11

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
APPLICATION OF IEC 60335-2-27 FOR FIELD INSPECTIONS
OF UV EMISSION OF UV APPLIANCES

FOREWORD
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IEC TR 63381 has been prepared by IEC technical committee 61: Safety of household and
similar electrical appliances. It is a Technical Report.
The text of this Technical Report is based on the following documents:
Draft Report on voting
61/7339/DTR 61/7388/RVDTR
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Report is English.

– 4 – IEC TR 63381:2025 © IEC 2025
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
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The committee has decided that the contents of this document will remain unchanged until the
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specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
INTRODUCTION
IEC 60335-2-27 provides requirements on the emission of UV radiation by UV appliances as
covered by its scope. These requirements are intended for determining compliance during the
type-testing of the products in a laboratory environment.
Later, market surveillance authorities would like to check this compliance at business locations
in their territory, since the UV emission of these products can be influenced in different ways
and health aspects can be ignored due to commercial interests, or just by a lack of knowledge.
The exchange of emitters can have an especially significant influence on the emission character
of UV appliances. Fluorescent UV lamps and high-pressure metal halide lamps are showing
strong ageing behaviour and are replaced for performance reasons at least every 1 000 hours.
IEC 60335-2-27 introduced in connection with IEC 61228 the so-called X/Y lamp equivalency
code for UV fluorescent lamps and a marking on the appliances which lamps, with which code
are to be used with the appliance. Additionally, IEC 60335-2-27:2024, 7.12 states:
The instructions for UV appliances shall include the substance of the following:
– identification of components that can influence the ultraviolet radiation, such as filters and
reflectors;
– identification of replaceable UV emitters and a statement that they are only to be replaced
by types marked on the appliance. For fluorescent UV lamps for tanning, it shall be stated
that they are only to be replaced by types marked with an equivalency code, the UV
component of which falls within the UV component e
...