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The principle of the test consists in presentation to an assessor of a series of samples, some of which are composed of sample "A" while others are different from sample "A"; for each sample, the assessor has to determine whether or not it is identical to "A". This test requires the assessor to have evaluated a known sample "A" prior to the exposure to test…

1. SCOPE 1.1 This Standard sets forth requirements for ionization-type and photoelectric-type detectors, rated at 300 V or less, to be employed in ordinary indoor locations in accordance with the following: A Standard for the Installation of Fire Alarm Systems, CAN/ULC-S524M; B Standards of the National Fire Protection Association: No. 71,…

1. SCOPE 1.1 This Standard sets forth requirements for smoke-alarms, single- and multiple-station type, rated 120 V or less, intended for open area protection in ordinary indoor locations. 1.2 A smoke-alarm, as defined by these requirements, is a self-contained unit which consists of an assembly of electrical components including a smoke chamber, alarm-sounding appliance, and…

1. Scope 1.1 This Standard specifies requirements for certification of companies engaged in fusion welding of aluminum performed as part of the fabrication or erection of aluminum structures. 1.2 Requirements necessary to obtain and maintain certification include the qualification of welding procedures, the qualification of personnel, and an assessment of welding and auxiliary e…

Intended as a guide to the behaviour of this material in contact with chemicals as aggressive gases and fluids, e.g. acids, alkalies, solvents, etc. This information is based on practical experience of manufacturers and users and summarized in tables. Without prior knowledge or experience of application, table-based selections should be confirmed by tests, where attention should be paid to the…

1. Scope 1.1 General 1.1.1 This Standard applies to the continuous measurement of the concentrations of (a) oxygen (O2) (see Clause 6.1); (b) carbon dioxide (CO2) (see Clause 6.2); (c) carbon monoxide (CO), (see Clause 6.3); (d) sulphur dioxide (SO2) (see Clause 6.4); and (e) nitrogen oxides (NOx); in a continuously extracted sample of combustion gases from an enclosed gas…

ULC Standards has withdrawn this Standard effective July 24, 2014 due to the lack of use and reference in the Canadian Industry and Regulations. 1. PURPOSE AND SCOPE 1.1 This method determines the flammability of finished textile floor covering materials when exposed to an ignition source (methenamine tablet) under specified conditions. 1.2 This method is applicable to all types of…

The principle of the method consists in the dilution of a sample with a suitable solvent, separation of the pigment by centrifugation. Three methods, dependent on the binder of the product being examined, are described. Extraction of the separated pigment with hydrochloric acid at a ratio of mass:volume of 1:15, except for the determination of "soluble" lead; in that case, extraction is…

Specifies the test method to be used in laboratories for assessing the air permeability of non-opening joints between components in the exterior walls of buildings, whether the joints have been subjected to prior ageing or not. Does not apply to joints within components (for example the joint between glass fixed in a window frame and sealed with a glazing compound).

Letter symbols including conventions and signs for electrical technology. A compact, easy-to-read handbook detailing the governing conventions for electric and magnetic circuits (IEC 60375) and the standardization of letter symbols together with a list of letter symbols in general use prior to 1983.