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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…

This document specifies the characteristics of solid, liquid or gas sources of gamma emitting radionuclides used as reference measurement standards for the calibration of gamma-ray spectrometers. These reference measurement standards are traceable to national measurement standards. This document does not describe the procedures involved in the use of these reference measurement standards for the…

IEC 60335-2-40:2022 deals with the safety of electric heat pumps, sanitary hot water heat pumps and air conditioners, incorporating motor-compressors as well as hydronic fan coils units, dehumidifiers (with or without motor-compressors), thermoelectric heat pumps and partial units. Their maximum rated voltage being not more than 300 V for single phase appliances and 600 V for multi-phase…

IEC 63269:2022 specifies the minimum requirements for aspects related to operation, construction, documentation, methods of testing and required test results for ITU-R M.2135 AMRD Group A man overboard (MOB) devices intended for alerting and locating purposes, as defined by IMO and in accordance with ITU‑R M.493 Class-M. This document consists of three modules where the first module, Module A,…

IEC 60335-2-40:2022 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 60335-2-40:2022 edition 7.0 and the previous IEC 60335-2-40:2018 edition 6.0. Furthermore, comments from IEC SC 61D experts are provided to explain the reasons of the most relevant changes, or to clarify any part…

1 Scope 1.1 This standard applies to flashlights and lanterns powered by secondary (rechargeable) batteries and general purpose primary (non-rechargeable) batteries with a maximum voltage of 75 V d.c. The terms flashlights and lanterns as used within this standard refer to products that are battery-powered. 1.2 Flashlights and lanterns that are battery-powered and also powered from a line-…