定价： 975元 / 折扣价： 829 元

定价： 819元 / 折扣价： 697 元

定价： 605元 / 折扣价： 515 元 加购物车

定价： 0元 / 折扣价： 0 元 加购物车

定价： 260元 / 折扣价： 221 元 加购物车

1. Scope 1.1 This Standard applies to electrically operated, general- purpose valves and safety valves that are intended to be used in ordinary locations in accordance with the Canadian Electrical Code, Part I, for the control of fluids (e.g., air,

定价： 455元 / 折扣价： 387 元

This PDF includes GI #2, #3 and #4. 1. Scope 1.1 This Standard applies to cord-connected, electrically heated bedding such as blankets, comforters, quilts, sheets, mattresses, and mattress pads with associated control units, for household use, desi

定价： 546元 / 折扣价： 465 元

This specification covers nonmetallic semi-conducting and electrically insulating rubber tapes designed for the splicing and repair of electrical wire and cables operating at specified phase to phase voltages. The tapes, which are classified into five types (Types I, II, III, IV, and V), shall conform to physical property requirements such as tensile strength, elongation at break, dielectric strength, dissipation factor, permittivity, volume resistivity, behavior during fusion test, ozone resistance, heat exposure, and UV resistance.1.1 This specification covers nonmetallic semi-conducting and electrical insulating tapes designed for the splicing and repair of electrical wire and cables operating at voltages up to 325 kV, phase to phase.1.2 The SI values are the standard. The values stated in inch-pound units given in parentheses are for information purposes only.1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

5.1 With the increased use of geomembranes as a barrier material to restrict liquid migration from one location to another, a need has been created for standardized tests by which the continuity of the installed geomembrane, including the seams, can be evaluated. This practice is intended to meet such a need whenever the subgrade soil is nonconductive, or a geomembrane is installed on a nonconductive material.5.2 The use of a suitably conductive geotextile installed between a nonconductive soil or material and the geomembrane will permit electrical leak location survey to be conducted.5.3 The compatibility of a conductive geotextile and leak location equipment shall be assessed for each leak location technique considered (covered or exposed, when applicable). A realistic small-scale test shall have been conducted by the supplier of geotextile and/or leak detection equipment to demonstrate their mutual compatibility for a given leak detection technique.1.1 This standard practice describes standard procedures for using a conductive geotextile with electrical methods to locate leaks in exposed geomembranes and geomembranes covered with water or earth materials containing moisture.1.2 This standard practice provides guidance for the use of appropriate conductive geotextile used in leak location surveys on geomembranes. This guide includes all types of conductive geotextiles with sufficient conductivity for the particular electrical leak location method. A conductive geotextile is applicable to all types of geoelectric surveys when there is otherwise not a conductive layer under the geomembrane.1.3 This standard practice is intended to ensure that leak location surveys can always be performed with a reasonable level of certainty. This standard practice provides guidance for the use of appropriate conductive geotextiles used in leak location surveys on geomembranes.1.4 Leak location surveys can be used on nonconductive geomembranes installed in basins, ponds, tanks, ore and waste pads, landfill cells, landfill caps, other containment facilities, and building applications such as in parking garages, decks, and green roofs. The procedures are applicable for geomembranes made of nonconductive materials such as polyethylene, polypropylene, polyvinyl chloride, chlorosulfonated polyethylene, bituminous material, and other electrically insulating materials. Leak location surveys involving conductive or partially conductive geomembranes are not within the scope of this document.1.5 Warning—The electrical methods used for geomembrane leak location could use high voltages, resulting in the potential for electrical shock or electrocution. This hazard might be increased because operations might be conducted in or near water. In particular, a high voltage could exist between the water or earth material and earth ground, or any grounded conductor. These procedures are potentially VERY DANGEROUS, and can result in personal injury or death. Because of the high voltage that could be involved, and the shock or electrocution hazard, do not come in electrical contact with any leak unless the excitation power supply is turned off. The electrical methods used for geomembrane leak location should be attempted only by qualified and experienced personnel. Appropriate safety measures must be taken to protect the leak location operators as well as other people at the site.1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 515元 / 折扣价： 438 元 加购物车

This PDF includes GI #2 and Amd #1. 1. Scope 1.1 This Standard applies to portable hand-held electrically heated tools for voltages of 250 V and less, designed to be used in ordinary (ie, nonhazardous) locations in domestic, commercial, or industr

定价： 455元 / 折扣价： 387 元

1. Scope This clause of part 1 is replaced as follows: Replacement: 1.1 This part 2-8 applies to electrically operated water valves for use in, on or in association with equipment for household and similar use that may use electricity, gas, oil,

定价： 1138元 / 折扣价： 968 元

1. Scope This clause of Part 1 is replaced as follows: 1.1 This part of International Standard IEC 730 applies to controls for automatically controlling the starting windings of single phase motors associated with equipment for household and simila

定价： 455元 / 折扣价： 387 元

This specification covers electrically insulating plastic guard equipment and guard systems for temporary insulation on electric power circuits. Typical plastic guard equipments include, but are not limited to, line guards, line guard connectors, insulator covers, dead end covers, bus guards, bus “T” guards, pole guards, ridge pin covers, switch-blade covers, arm guards, cutout covers, and cross arm guard. Materials for guards shall conform to the specified impact strength, water absorption, dielectric strength, flame retardancy, dimensions, workmanship, finish, appearance, marking, and packaging.1.1 This specification covers plastic guard equipment and guard systems used by workers for temporary insulation on electric power circuits.1.2 Plastic guard equipment covered by this specification is rated for momentary, or brush contact only. Maximum-use voltages are covered in Annex A1.1.3 Typical guards covered include, but are not limited to, the following:1.3.1 Conductor guards and connecting covers as follows:1.3.1.1 Line guards,1.3.1.2 Line guard connectors,1.3.1.3 Insulator covers,1.3.1.4 Dead end covers,1.3.1.5 Bus guards, and1.3.1.6 Bus "T" guards.1.3.2 Structure and apparatus covers as follows:1.3.2.1 Pole guards,1.3.2.2 Ridge pin covers,1.3.2.3 Switch-blade covers,1.3.2.4 Arm guards,1.3.2.5 Cutout covers, and1.3.2.6 Cross arm guard.1.4 The values stated in inch-pound units are to be regarded as the standard.

定价： 0元 / 折扣价： 0 元

1. Scope and normative references 1.1 Add the following paragraph: This standard applies to motor-starting relays using NTC or PTC thermistors, additional requirements for which are contained in Appendix J. . 1.1.1 Add the following paragraphs: Motor-

定价： 273元 / 折扣价： 233 元

1. Scope 1.1 This Standard applies to household electric toys operating at nominal potentials of 120 volts or less, including extra low potential, and intended for use in ordinary (ie, non-hazardous) locations as defined in the Canadian Electrical Cod

定价： 455元 / 折扣价： 387 元