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IEC 62055-31:2022 CMV contains both the official standard and its commented version. The commented version provides you with a quick and easy way to compare all the changes between IEC 62055-31:2022 edition 2.0 and the previous IEC 62055-31:2005 edition 1.0. Furthermore, comments from IEC TC 13 experts are provided to explain the reasons of the most relevant changes, or to clarify any part of the…

This document is applicable to short glass fibre reinforced polyethylene (PE-sGF) pipes manufactured by the spiral cross winding method, which are used below ground for the conveyance of liquid fluids for the following industrial and agricultural uses: —    chemical plants; —    industrial sewerage engineering; —    power engineering (cooling and general-purpose water supply); —    agricultural…

1.1 These requirements apply to low voltage luminaire systems whose electrical power is derived from photovoltaic modules. Systems include, at a minimum, a photovoltaic (PV) module, storage batteries, one or more co-located luminaires, and controls to manage the energy flow between these subassemblies. These systems are intended to be installed in accordance with: a) CSA C22.1, the Canadian…

IEC TR 61000-1-4:2022 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition. IEC TR 61000-1-4:2022 which is a technical report, reviews the sources and effects of power frequency conducted…

IEC TR 61000-1-4:2022 which is a technical report, reviews the sources and effects of power frequency conducted harmonic current emissions in the frequency range up to 2 kHz on the public electricity supply, and gives an account of the reasoning and calculations leading to the existing emission limits for equipment in the editions of IEC 61000-3-2, up to and including the fifth edition (2018)…

1.1 These requirements cover check valves of 1 NPS and larger, used in piping systems supplying water for fire protection service. 1.2 The check valves covered by these requirements are intended for installation and use in accordance with the Standards for: a) Low-, Medium-, and High-Expansion Foam, NFPA 11; b) Installation of Sprinkler Systems, NFPA 13; c) Installation of Standpipe and…

1 Scope This clause of Part 1 is replaced by the following. This International Standard deals with the safety of electrical appliances incorporating emitters for exposing the skin to optical radiation (wavelength 100 nm to 1 mm), for household and similar use, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. NOTE 101 Battery-operated…

1 Scope 1.1 General This Standard contains best practice guidance for the design and construction of low-rise, wood-frame buildings to withstand high winds corresponding to EF-2 tornado-level wind speeds, assumed to be associated with a reference velocity pressure of 1 kPa. The guidance in this Standard is based on, and written to, supplement the requirements specified in Part 9 of the National…

This document specifies a uniform representation of human sexes for the interchange of information. It is intended to: — reduce the time required to record and/or format the representation of sexes and transmit the corresponding data; — improve clarity and accuracy of interchange; — minimize the amount of human intervention required for communicating the representation of sexes; and…

This document specifies a uniform representation of human sexes for the interchange of information. It is intended to: —    reduce the time required to record and/or format the representation of sexes and transmit the corresponding data; —    improve clarity and accuracy of interchange; —    minimize the amount of human intervention required for communicating the representation of sexes; and…