Ul 1703 and 2703 activities ul 1703 changes expanded definitions. Methods of grounding and bonding conductor connection to electrodes. For your convenience, the stp number and title, standards covered by the stp, and ul staff contacts are identified for each stp. Grounding of an electrical system should be done to limit high voltage causes by lighting strikes or any misscontact of low voltage wires with high voltage wires. Sizes are in accordance with table 16 of the canadian electrical code, part 1. The dynobond replaces the conventional method of installing one ground lug per solar module and running a solid six gauge continue reading dynobond. Bonding conductor shall be run neatly and uniformly to the equipment, racks and trays. The grounding or bonding conductor shall be connected to the grounding electrode by exothermic welding, listed lugs, listed pressure connectors, listed clamps, or other listed. Uls standards are essential to helping ensure public safety and confidence, reduce costs, improve quality and market products and services. This specification covers the requirements for flexible multi conductor tinned copper flame retardant boat cable. Soares book on grounding and bonding, 9th edition, for added information.
May be revised based upon large scale fire testing per ul 9540a. Bonding tester mvp10lfs especially light and ergonomic design. Guardian of the ground electrical contractor magazine. There is a bit of a myth that all grounding devices must be tested individually with every pv module on the market. It is the responsibility of the contractor, company or licensee to provide a written report of the test and maintenance results to the building owner and the local fire authority having jurisdiction at the completion of the testing and maintenance. For installations fed by a nonpme supply, such as a tns or tt earthing system, regulation 544. See the standard for flatplate photovoltaic modules and panels, ul 1703 or the standard for inverters, converters, controllers and. The connection between the grounded circuit conductor and the equipment grounding conductor at the service 250. The grounding of electrical circuits and systems and the bonding of. Recent field testing performed on a ul 2703 array showed that the ul 2703 method had.
In single conductor cables the equipment bonding conductor is in the form of concentric wires over the insulation or shield. Outline of investigation for pump tank extinguishers. Connected to establish electrical continuity and conductivity. The evolution of ul 2703 underwriters laboratories ul has been positively impacting the solar industry for many years and, in 2008, it began developing ul 2703 standards and guidelinesthe codes that provide a framework for racking manufacturers to work within, ensuring the safety, reliability, and performance of their products. Communication system bonding conductors and grounding electrode conductor s shall be protected where exposed to physical damage and we are installed in a metal raceway.
Electrical bonding is the practice of intentionally electrically connecting all exposed metal items not designed to carry electricity in a room or building as protection from electric shock. Ul 3703 standard for solar trackers standards catalog. Tested to astm b11709 for operating in a salt spray fog environment. Bonding conductor shall be run neatly and uniformly to the equipment. For the ul product category for metallic outlet boxes qcit, the ul guide information indicates all boxes with concentric or eccentric knockouts have been investigated for bonding and are suitable for bonding without any additional bonding means. Metal framing members shall be bonded to the equipment grounding conductor for the circuit that may energize the framing and be sized in accordance with the national. Communication system bonding conductors and grounding electrode conductors shall be protected where exposed to physical damage and we are installed in a metal raceway. The gap between the previous outlineofinvestigation issue number 2 november, 2012 of ul 2703 is minor but one test revision is noted as being significant. Reprint jun 2017 ul standard for safety grounding and bonding equipment ul 1741 2010.
At the time of installation a resistance test is needed to confirm electrical continuity to ground. Grounding and bonding theory quiz 1 electrician practice tests. Electrical bonding theory quiz electrician exams practice tests. Dynobond the dynoraxx dynobond is a proprietary, ul recognized design that allows the dynobond to be used as a jumper between modules and rows. Guidelines for grounding and bonding telecom systems. Grounding limits the high voltage in electrical system. The minimum copper equivalent csa is given by a copper bonding conductor of the tabulated csa or a bonding conductor of another metal affording equivalent conductance. See especially bonding conductor test in table below. Installer regularly engaged, for a minimum of 5 years, in installation of products specified in this. Electrical system grounding that is connected to earth will limit the voltage imposed by which of the following. Any part of the tracker that is utilized for mechanical support, bonding or grounding of the solar devices shall comply with the standard for mounting systems, mounting devices, clampingretention devices, and ground lugs for use with flatplate photovoltaic modules and panels, ul 2703, or as referenced to ul 2703 within the requirements of this standard. One benefit of aluminum pv module frames is that the. One of the key benefits of ul 2703 is that it allows for the evaluation of bonding and grounding devices for various thicknesses of metals and types of coatings on metals.
If a failure of electrical insulation occurs, all bonded metal objects in the room will have substantially the same electrical potential, so that an occupant of the room cannot touch two objects with. Ul 1703 and ul 2703 are still undergoing significant change, so this report. The proper installation of bonding and grounding devices is important in the protection of personnel and equipment. Remember that this includes the main protective conductor and the earthing conductor. Strips that depend upon serrated or toothed fingers for grounding must not be used. The intention of this particular application note is to investigate, define and clarify the protective earthing and bonding requirements in paragraph 2.
Our breadth, established objectivity and proven history mean we are a symbol of trust, enabling us to help provide peace of mind to all. Both ends of the raceway must be bonded to the contained conductor or to the same terminal or electrode to which the bonding conductor grounding electrode conductor is connected. The ul 2703 standard is intended to cover all equipment related to bonding and grounding of pv modules and their support structures. Testing and inspection of bondinggrounding systems.
Electrical grounding and bonding, 4e a userfriendly, practical guide provides a thorough and effective introduction to the essentials of electrical grounding and bonding. Grounding and bonding code prohibits the use of ground clamps on multiple conductors unless the clamp is listed for that use. If a failure of electrical insulation occurs, all bonded metal objects in the room will have substantially the same electrical potential, so that an. All of a trackers characteristics are examined and assessed, ensuring they comply with ul 2703, including requirements within the standard for mounting systems, mounting devices, clamping and retention devices and ground.
E357798 1 38 x 34 green hex bolt, ss 1 38 washer, ss 1 upper ground clip, ss. Grounding and bonding for electrical systems 26 05 26 4 of 7 figure i bonding of conduit and equipment grounding conductor 3. Solidstate component test exemptions the following solidstate components may be disconnected from the remainder of the circuitry during either dielectric voltage withstand test. Protective conductors and bonding conductor sizes the. Sun ul 2703, mounting systems, mounting devices, clamping. Please add this email address to your address book or email whitelist to. Grounding versus bonding part 5 of 12 mike holt enterprises. Cobra boat cable meets or exceeds abyc, ul, coast guard requirements. Electrical rigid metal conduit aluminum, red brass, and stainless steel. You have reached 0 of 0 points, 0 not categorized 0% question 1 of 15. Pdf design and testing of a composite pv support structure. The lighting system protection ground terminals shall be bonded to which of the following grounding electrode system. Manufacturer regularly engaged, for a minimum of 5 years, in the manufacturing of threaded fasteners used in grounding and bonding for electrical systems.
Section 2704 bonding metal framing members 2704 bonding metal framing members. Green insulated copper bonding conductor, size as requires by nec. Fully annealed, stranded tinned copper per astm b33. Ul 2703 recently was elevated from draft standard status to a full ansiaccredited national standard like ul 467 and ul 1703. Jun 28, 2010 the best way to test your bonding is by your r2 wander lead test, this will confirm that the bonding is connected to the met at the db. Connections to the tmgb shall be made by exothermic welding or by listed twohole compression lugs. List of uls standards technical panels stps below is a list of the nearly 400 ul stps. The reason why proper electrical bonding techniques are so important is that it protects.
To contact the stp project manager by email, click on the project managers name. Guidelines for grounding and bonding telecom systems feb 1, 2012 matt peterworth, rcdd, p. With supplementary bonding, even if the csa of the bonding conductor is compliant with the regs, they still specify a test of its effectiveness. Ul is a global independent safety science company offering expertise across three.
Conform to ul 467, with additional requirements as specified herein. Ul 1426 round multiple conductor boat cable cobra wire. Submit report of test results of grounding resistance. Component na sample and test specifics for followup tests at ul the following tests shall be conducted in accordance with the generic inspection instructions. Ul 2703 standard for mounting systems, mounting devices. Do not daisy chain bonding conductors from device to devices. Equipment bonding conductor class b stranded soft bare copper is the standard equipment bonding conductor material. This provides a return path for any stray voltage that the case may be exposed to via component failure e. Free online test on grounding and bonding national electrical code 250 grounding and bonding.
Electrical bonding theory quiz electrical bonding theory quiz test. Pv systems are electrical power generation systems that produce energy. The investigation consists of electrical and structural testing per. Our strategic solutions address complex, multifaceted problems, while our targeted services tackle specific concerns. Sizing main protective bonding conductors voltimum uk. Fire protection systems, california fire code 2016. Ul 3703 certification ensures that a solar tracker has met the stringent safety requirements of the national electrical code, nfpa 70. Ul 2703 standard that includes bonding and grounding testing of module. Grounding and bonding with concentric and eccentric. If a bonding jumper is used to accomplish this bonding to intervening metal raceways and enclosures, the size of the bonding jumper must not be smaller than the required contained grounding electrode conductor as provided. The theory is to ensure that the resistance r value measured across any of the two conductive, parts mentioned above,multiplyed by the current causing. These methods apply to all intervening ferrous raceways, boxes and enclosures containing the grounding electrode conductor.
Continuity of protective conductors this test is to ensure that. Written in accordance with the 2014 national electrical code, electrical grounding and bonding, fourth edition, features complete, uptodate coverage of article 250. In the case of main bonding, although there is guidance elsewhere suggesting a maximum mpb conductor resistance of 0. Ul 2703 surge of applicants for grounding and bonding. Size this equipment grounding bonding conductor per 250. Teck construction data ecs electrical cable supply ltd. It indicates a manufacturer has complied with the highest electrical and mechanical engineering standards. Specification standard grounding and bonding 27 05 26 the university of new mexico 802 yale blvd. Our offerings expertly address business needs and industry challenges. Reprint jan 2015 ul standard for safety inverters, converters, controllers and interconnection system equipment for use with distributed energy resources ul 2703 2015 ul standard for safety mounting systems, mounting devices. Dont bond the grounded conductor neutral to the disconnecting means or to the building. Electrical bonding is the practice of connecting equipment cases or structure to ground to prevent electric shock. Grounding terminals in all receptacles on multioutlet assemblies must be hardwired to an equipment grounding conductor. The practice of bonding the grounded neutral conductor to the equipment enclosure is only permitted by 250.
The sold out exhibit hall will feature a variety of solar products. Install a driven ground rod through manhole or handhole floor, close to wall, and set rod depth so 4 inches 100 mm will extend above finished floor. When fire tested in accordance with ul 2703 and installed in accordance with. Below are exhibiting companies that are displaying new products, or featuring updated product lines. Committees in creating test questions for the nabcep pv installation professional. A clear path to ground allows a prompt response of the protective devices, located upstream of the fault.
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