ML0038 September 27, 2017 - 17 - Copyright 2017 Bitronics, LLC
Definitions:
Enclosure Category 2: Enclosures where no pressure difference relative to the
surrounding air is present.
Installation Category II (Overvoltage Category II) or CAT II: Equipment is intended
for connection to the fixed installation of a building. The power supply to the electronic
equipment is separated from other circuits, usually by a dedicated transformer for the
mains power supply.
Measurement/Installation Category III (Overvoltage Category III) or CAT III:
Distribution Level, fixed installation, with smaller transient overvoltages than those at
the primary supply level, overhead lines, cable systems, etc.
Pollution: Any degree of foreign matter, solid, liquid, or gaseous that can result in a
reduction of electric strength or surface resistivity of the insulation.
Pollution Degree 2: Only non-conductive pollution occurs except that occasionally a
temporary conductivity caused by condensation is to be expected.
1.4 Environment
UL/CSA Recognized, File Number E164178
UL61010-1, Edition 3, Issue Date 2012/05/11
Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 1: General Requirements
UL61010-2-30, Edition 1 – Issue Date 2012/05/11
Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 2: Particular Requirements for Testing and Measuring Circuits
CSA C22.2 No. 61010-1-12-CAN/CSA, Edition 3, Issue Date 2012/05/01
CAN/CSA Safety Requirements for Electrical Equipment for Measurement, Control,
and Laboratory Use – Part 1: General Requirements
CSA C22.2 No. 61010-2-30-12-CAN/CSA, Edition 1 – Issue Date 2012/05/01
Safety Requirements for Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 2-030: Particular Requirements for Testing and Measuring
Circuits
If applicable, the CE mark must be prominently marked on the case label.
European Community Directive on EMC (EMCD) 2014/30/EU, superseding
2004/108/EC and Directive 91/263/EC [TTE/SES].
European Community Directive on Low Voltage (LVD) 2014/35/EU,
superseding 2006/95/EC
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