Minimum wire bending space at terminals and minimum width of wiring gutters nec table 312. Ul 1617 ul 1618 ul 1672 double insulated hook up wire 6 applications. Hot air and gases are forced out at the top of the door. To be completely clear, it is an exact copy of the current iec standard. Ul 1066 higher endurance testing for ul 1066 at all ratings e. Ul1558 switchgear contains minimal engineering guidelines. An overview of power distribution equipment standards. Audiovideo, information and communication technology. Spacing requirements for power distribution and terminal blocks. Pdbs listed to ul 1953 meet these spacing requirements. Understanding control of emergency lighting circuits.
The 7th edition of ul 1008 becomes effective november 1, 2014. Ul 489 standard covers molded case circuit breakers, motor circuit protectors, molded case switches and miniature circuit breakers. An electronic document associated with a ul standard for safety or outline of investigation, and issued by ul to propose. Ul 1008 is the standard for transfer switch equipment and it was issued by ul in 1972 to help ensure the safety of installation, operating and maintenance personnel who interface with transfer switch equipment. The 7th edition of ul 1008 became effective november 1, 2014 and has resulted in significant changes to the shortcircuit ratings shown on all transfer switch products in the industry. Main differences are in bus clearances, insulated bus vs. Ul1007 and ul1015 are both types of pvc hook up wire used indoors in applications such as appliances and electronic devices. Unless noted otherwise in this article, we are examining. The atys is a full load break disconnect where the main components are based on proven technology also fulfilling requirements in ul 98 and iec 609473 standards. Understanding and applying ul 1008 transfer switch. Basically, ul891 is an engineering guideline for building safe equipment that will meet nec requirements. Standard type 3r cabinet is weatherproof with or without temporary. It offers a lighterweight alternative to rmc while providing an outstanding level of protection.
It will result in significant changes to the shortcircuit ratings shown on all transfer switch products in the industry. Our breadth, established objectivity and proven history mean we are a symbol of trust, enabling us to help provide peace of mind to all. Ul 1008 was established in 1970 by underwriters laboratories to guard. Ul 891 ul standard for safety switchboards engineering360. Service entrance muq configurations are listed under ul 891 ts is ul 1008. Ul 1008 listed transfer switch with arms at the point of. Ul 1054 the standard for special use switches will be withdrawn on june 23, 2015.
Uniform thickness of wire to ensure easy stripping and cutting. Ground fault trip protection provided on sizes amps and above. A fully ul 1008 listed service entrance transfer switch is provided. Audio is available through teleconference, or your computer dont forget to unmute. The changeover is done in open transition and with minimum supply interruption during transfer ensuring full compliance with ul 1008 and iec 6094761. Both come in about 10 solid color options along with an unlimited amount of striped color options making it very convenient for contract assembly houses that manufacture wire harnesses and assembl.
Ul 891 listed for 4000a, and 5000a controls and wiring all control relays and industrialgrade relays are totally encapsulated to minimize exposure to dust and dirt. It is important to be aware that ul1008 listed devices are typically more complex and expensive. Spacing requirements for power distribution and terminal. Automatic transfer switch is listed to ul1008 for total system loads. Asco series 300 service entrance power transfer switch. Ul 1008 transfer switch equipment standards catalog. Ul 1008 is the standard for transfer switch equipment and it was issued by ul in 1972 to help ensure the safety of installation, operating and maintenance. After june 23, 2015, only ul 610581 will be used for the evaluation of switches. The switch and genset combination is specifically designed for a simplified, quicker. This continuing certification approach enables manufacturers to transition from ul1054 to ul 610581.
References to the national electrical code nec are to the 2014 edition. Service entrance transfer switch rss residential 100 200 amp the service entrance rss automatic transfer switch is integrated with the rs12000 genset. Discuss the ul 1008 requirements for transfer switch withstand and closing ratings. Ul 1778 uninterruptible power systems standards catalog. Installing security contractors will need to become educated on the differences between american national standards institute ansi and underwriters laboratories ul standards ansiul 2034 and ansiul 2075, plus be aware of the new requirements of the third edition of ansiul 2075 that became effective in late 2009. The application of switchgear and switchboards by jerry milton, ge systems engineer. This standard applies to switchboards nominally rated at 600 v or less and intended for use in accordance with the canadian electrical code, part 1 ce code, part 1, the national electrical code nec, ansinfpa 70, and the mexican standard for electrical installations utility, nom001sede. The appearance of the labels will be affected as follows.
As released, ul 623 is fully harmonized with iec 623. For many facilities, it is ideal to locate the ats at or very near the service entrance location. Ul 891 does not address a 30cycle rating but some switchboards. Underwriters laboratories international germany gmbh. Only products which bear uls mark are considered certified. Also switchgear meets ul 1558 while a switchboard meets ul 891. Asco series 300 manual transfer switch with integrated quick. Ul is a global independent safety science company offering expertise across three strategic. Ul 1773 standard for termination boxes standards catalog. A complete new edition of an existing standard or outline. Test procedure withstand current is applied for 3 cycles and the contacts must remain closed. Fireresistance ratings ansiul 263 see general information for fireresistance ratings ansiul 263 design no.
Underwriters laboratories ul standard 924emergency lighting and power equipment underwriters laboratories ul standard 1008transfer switch equipment. Sales bulletin understanding control of emergency lighting circuits and this may be a visually unacceptable the ul924 vs. Ul marking and application guides are updated as necessary due to new product development, changes in the codes, or the need for clarification. Ul 1008 withstand ratings any breaker any circuit breaker can be used upstream. Jan 17, 2016 22 comparison of standards endurance ul 1066 and ul 489 continued maintenance of contacts is allowed under ul 1066 m required nos. Ul 4703 type pv ul 44 type rhh or rhw2 ul 854 type use2 rated 90c for wet or dry locations rated for direct burial stable electrical properties over a broad temperature range flame test compliances.
This course provides an overview of power distribution standards including ul 891, ul 1558, ul 1008 and related international standards. A comparison of contemporary electrical distribution. Find the most uptodate version of ul 891 at engineering360. White paper ul 1008, 7th edition withstand and closing. Ul1008 debate is clarified by ul by steve terry for some time, the proper control of emergency lighting circuits has been a topic of hot debate for manufacturers, systems integrators, and specifying electrical engineers. Power distribution block application examples ul 508a pdb in ul 508a, 480v feeder circuit must have spacing of 1. Ul 98 covers fused and nonfused disconnect switches. Ul1007 16 awg hook up wire compared to ul1015 wesbell. Special processes conformance inspection quality eldre. Ul 1008 covers transfer switches that are rated for use in emergency systems and for other applications. The ul 325 standard allows all applicable products to be tested at a nationally recognized testing laboratory. White paper ul 1008, 7th edition withstand and closing rating. Although these new service barrier requirements enhance the safety of working on panelboards, siemens recommends turning off and locking all power supplying these panelboards.
No flame detected on nonfire side of door for more than 10 seconds. Both ul 489 and ul 98 offer high shortcircuit withstand andor interrupting ratings and both can be operated through the enclosure door or by flange operator. Underwriters laboratories international netherlands b. Silver plated copper ground and neutral bus with solderless screw type terminals. Ul1007 1569 1061 stranded wire ulcsa stranded wires selection complying to ulcsa pvc insulation rating rating ul awm csa type insulation insulation size range temp. The only exception is that, following uls normal practices, the ul version of the standard requires that safety critical components are thirdparty certified. Mersen quality assurance performs visual, mechanical, and chemical inspections and validations to assure all received, manufactured, and delivered product meets or exceeds customer specifications. A manufacture need not adhere to the guidelines set in 891 if his gear has been tested and his methods are in his ul listing. Closeon contacts must close on the selected fault current level and remain closed for 3 cycles. Internal wiring of electronic and electrical equipment. A manual transfer switch under ul 1008 specification can transfer power at least 3,000 times with at least 1,000 changes under at least 100 percent of the rated load, while ul 1008 manual transfer switches rated at lower amperes must be able to complete at least 6,000 transfers under 100 percent load or greater. In addition to meeting new ul 67 requirements, these enhancements will meet the new requirements in section 408.
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