1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULApril 21, 20061SUBJECT 2452OUTLINE OF INVESTIGATIONFORELECTRIC SWIMMING POOL AND SPA COVER OPERATORSIssue Number: 1APRIL 21, 2006Summary of TopicsThis outline is being issued to document the requ
2、irements for ElectricSwimming Pool and Spa Cover Operators. These requirements werepreviously contained in Standard for Swimming Pool Pumps, Filters, andChlorinators, UL 1081, and the Standard for Electric Spas, EquipmentAssemblies, and Associated Equipment, UL 1563. The requirements havebeen combin
3、ed and expanded to form the basis for this Outline ofInvestigation.The UL Foreword is no longer located within the UL Standard. For informationconcerning the use and application of the requirements contained in thisStandard, the current version of the UL Foreword is located onULStandardsInfoNet at:
4、http:/ 2006 UNDERWRITERS LABORATORIES INC.UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULAPRIL 21, 2006SUBJECT 24522No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULC
5、ONTENTSINTRODUCTION1 Scope .62 General 62.1 Components .62.2 Undated references .62.3 Units of measurement .73 Glossary .74 Accessories 8CONSTRUCTION5 General 86 Frame and Enclosure 86.1 General .86.2 Metal enclosures .96.3 Nonmetallic enclosures 96.4 Drainage .106.5 Mounting pads or holes 107 Mecha
6、nical Assembly 108 Securement with Adhesives .119 Accessibility Requirements 1110 Resistance to Corrosion .1811 Power Supply Connections 2011.1 General .2011.2 Terminal compartments for supply connection .2111.3 Wiring terminals and leads 2212 Grounding .2313 Bonding .2413.1 General .2413.2 Equipmen
7、t grounding .2513.3 Installation bonding grid .2514 Live Parts 2515 Wiring .2515.1 General .2515.2 Splices and connections 2615.3 Wiring between component enclosures .2616 Separation of Circuits .2617 Electrical Insulation .2718 Printed-Wiring Boards .2719 Spacings 2819.1 General .2819.2 Class 2 cir
8、cuits .2819.3 Field wiring terminals .2819.4 At other than field wiring terminals and Class 2 circuits .2920 Gaskets .2921 Motors .3022 Transformers and Power Supplies 3023 Switches and Controllers 3124 Reduction of Risk of Injury to Persons .31APRIL 21, 2006 SUBJECT 2452 3UL COPYRIGHTED MATERIAL NO
9、T AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL24.1 General .3124.2 Safety controls and safety circuits 3224.3 Reliability 32PERFORMANCE25 General 3326 Available Current Test .3327 Insulation Resistance Test .3428 Starting Current Test 3429 Power Input Test .3430 Leak
10、age Current Test or Insulation Resistance Test Following Humidity Conditioning .3531 Temperature Test .3532 Dielectric Voltage-Withstand Test .3933 Water Exposure Tests .3933.1 General .3933.2 Water exposure 4033.3 Immersion test .4234 Abnormal Operation Tests .4234.1 Transformer test .4234.2 Electr
11、onic component test .4335 Strain-Relief Test .4336 Metallic Coating Thickness Test 4337 Section 37 reserved for future use 45MANUFACTURING AND PRODUCTION-LINE TEST38 Dielectric Voltage-Withstand Test .45RATINGS39 General 45MARKINGS40 General 4641 Wiring Diagram .4642 Additional Markings .47INSTRUCTI
12、ONS43 General 4744 Important Safety Instructions .4844.1 General .4844.2 For all units 48APRIL 21, 2006SUBJECT 24524UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULSUPPLEMENT SA - TYPICAL MOTORIZED POOL COVER OPERATORGeneralSA1 General SA1SA2
13、Motors .SA3SA3 Mechanism .SA3SA4 Cover Fabric SA3SA5 Tracks SA3SA6 Leading Edge .SA3SA7 Electrical Control SA4SA8 Cover Pump SA4APRIL 21, 2006 SUBJECT 2452 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULINTRODUCTION1 Scope1.1 These requireme
14、nts cover electric swimming pool cover operators intended for installation and use inaccordance with Article 680 of the National Electrical Code, NFPA 70.1.2 These requirements are intended to address, but not be limited to, electric fire, shock and casualtyhazards. The requirements are not intended
15、 to address the ability of the cover to function as a barrier tounauthorized access to a swimming pool or spa to help prevent drowning.2 General2.1 Components2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply withthe requirements for that component. Se
16、e Appendix A for a list of standards covering components usedin the products covered by this standard.2.1.2 A component is not required to comply with a specific requirement that:a) Involves a feature or characteristic not required in the application of the component in theproduct covered by this st
17、andard, orb) Is superseded by a requirement in this standard.2.1.3 A component shall be used in accordance with its rating established for the intended conditions ofuse.2.1.4 Specific components are incomplete in construction features or restricted in performancecapabilities. Such components are int
18、ended for use only under limited conditions, such as certaintemperatures not exceeding specified limits, and shall be used only under those specific conditions.2.2 Undated references2.2.1 Any undated reference to a code or standard appearing in the requirements of this standard shallbe interpreted a
19、s referring to the latest edition of that code or standard.APRIL 21, 2006SUBJECT 24526UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL2.3 Units of measurement2.3.1 Values stated without parentheses are the requirement. Values in parentheses ar
20、e explanatory orapproximate information.2.3.2 Unless indicated otherwise, all voltage and current values mentioned in this standard areroot-mean-square (rms).3 Glossary3.1 For the purpose of this standard the following definitions apply.3.2 ACCESSIBLE PART A part located so that it can be contacted
21、by a person.3.3 ACCESSIBLE TO THE OCCUPANT (OF THE SWIMMING POOL) Any surface or componentwithin 5 feet (1.52 m) of the swimming pool water, measured by any convenient method such as ameasuring tape or a 5-foot flexible wire, cord, or string.3.4 BONDING TERMINAL A pressure wire connector secured to
22、the enclosure in which the powersupply conductors are terminated, for the connection of a bonding conductor.3.5 CLASS 2 CIRCUIT A secondary circuit with an open circuit potential of not more than 30 voltsrms (42.4 volts peak) supplied by a Class 2 transformer, or by a transformer and fixed impedance
23、 thattogether comply with all performance requirements for Class 2 transformers in the Standard for Class 2and Class 3 Transformers, UL 1585.3.6 COMMON BONDING GRID A common bonding grid may be a copper grounding loop, metalreinforcing rods in a concrete or tile supporting pad, or a network of other
24、 local groundable metal thatlocal inspection authorities evaluate to be in compliance with Section 680-26(B) of the NationalElectrical Code, ANSI/NFPA 70.3.7 CONFORMAL COATING An insulating coating that conforms to the configuration of the objectthat is coated. The coating is used as a covering to p
25、rotect against environmental conditions.3.8 CONTROLLED ENVIRONMENT An environment that is relatively free from conductivecontaminants, such as dust and carbon particles, and that is protected against humidity andcondensation. A controlled environment may be provided by a hermetically sealed enclosur
26、e,encapsulation, or a conformal coating.3.9 ENCLOSURE That part of a unit that renders inaccessible any part that may present a risk ofelectric shock, prevents emission of flame or molten material, or prevents unintentional contact withinternal parts that may involve a risk of injury.3.10 GROUNDING
27、TERMINAL A designated pressure wire connector located within the field wiringcompartment to terminate the equipment grounding conductor of the supply circuit.3.11 ISOLATING TRANSFORMER A transformer with one or more output windings electricallyseparated from the input winding and all other output wi
28、ndings.3.12 RISK OF ELECTRIC SHOCK A risk of electric shock is considered to exist whenever theavailable current between:a) Any two points accessible to the swimming pool occupant,APRIL 21, 2006 SUBJECT 2452 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERM
29、ISSION FROM ULb) Any point accessible to the swimming pool occupant and ground, orc) Any point accessible to the swimming pool occupant and waterexceeds 0.5 milliampere when measured as described in the Available Current Test, Section 26.3.13 RISK OF FIRE A risk of fire is considered to exist when t
30、he power limitations of a Class 2 circuitas defined in the Standard for Class 2 and Class 3 Transformers, UL 1585, are exceeded.3.14 SAFETY CIRCUIT A circuit that is relied upon to reduce the risk of fire, electric shock,unintentional contact with moving parts, or other casualty hazard.3.15 SECONDAR
31、Y CIRCUIT A circuit supplied from an output winding of an isolating transformer.4 Accessories4.1 An accessory intended for field installation shall comply with the applicable requirements in thisstandard and shall be constructed so that it can be installed and used without the need for altering wiri
32、ng,enclosure, or other features of the basic unit that are relied upon to reduce the risk of fire, electric shock,or injury to persons.CONSTRUCTION5 General5.1 A unit shall be evaluated for both indoor and outdoor use.Exception: A unit is not prohibited from being evaluated for indoor use only when
33、it is marked inaccordance with 40.1(e).6 Frame and Enclosure6.1 General6.1.1 An enclosure shall be provided to house all electrical parts that may cause a risk of fire, electricshock, or injury to persons under any conditions of operation.6.1.2 A unit shall be formed and assembled so that it will ha
34、ve the strength and rigidity necessary to resistthe abuses to which it is likely to be subjected, without increasing the risk of fire, electric shock, or injuryto persons due to total or partial collapse with resulting reduction of spacings, loosening or displacementof parts, or other serious defect
35、s.6.1.3 Electrical enclosures, field-wiring compartments, and interconnecting wiring systems, cords andcables installed below grade shall be suitable for temporary immersion. See 33.3.Exception: This requirement does not apply to components that are secured a minimum 12 inches (0.3m) above the botto
36、m of the below grade equipment well.APRIL 21, 2006SUBJECT 24528UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.2 Metal enclosures6.2.1 The outer enclosure of a unit, if of sheet metal, shall not be less than 0.032 inch (0.81 mm) thick ifunco
37、ated steel, not less than 0.034 inch (0.86 mm) thick if galvanized steel, and not less than 0.045 inch(1.14 mm) thick if nonferrous. The enclosure shall also comply with Resistance to Corrosion, Section 10.6.2.2 An enclosure of sheet metal, other than that covered in 6.2.1, shall be evaluated with r
38、egard to itssize, shape, and thickness, considering the intended use of the complete unit. Sheet steel shall have athickness of not less than 0.026 inch (0.66 mm) if uncoated when measured, or 0.029 inch (0.74 mm) ifgalvanized. Nonferrous sheet metal shall have a thickness of not less than 0.036 inc
39、h (0.91 mm).Exception: Any relatively small area or surface that is curved or otherwise reinforced may be thinner thanspecified if the construction results in equivalent strength and rigidity.6.2.3 Cast metal portions of an enclosure shall be no thinner than indicated in Table 6.1.Table 6.1Minimum t
40、hicknesses of enclosure metalMetal At small, flat unreinforced surfaces andat surfaces that are reinforced bycurving, ribbing, or the like (or areotherwise of a shape or size or both) toprovide physical strength,At relatively large unreinforced flatsurfaces,inch (mm) inch (mm)Die-cast 3/64 1.2 5/64
41、2.0Cast malleable iron 1/16 1.6 3/32 2.4Other cast metal 3/32 2.4 1/8 3.26.3 Nonmetallic enclosures6.3.1 Among the factors taken into consideration when evaluating the acceptability of a nonmetallicmaterial, other than a polymeric material, when used to enclose grounded metal or live parts are:a) Me
42、chanical strength;b) Resistance to impact;c) Moisture absorptive properties;d) Combustibility; ande) Resistance to distortion at temperatures to which the material may be subjected underconditions of normal or abnormal use.6.3.2 A polymeric material used as the enclosure of live parts, or as a barri
43、er in lieu of spacings shallcomply with the applicable requirements in the Standard for Polymeric Materials Use in ElectricalEquipment Evaluations, UL 746C, based on the application and, if intended to be exposed to sunlight, itshall also be investigated for resistance to the ultraviolet light expos
44、ure requirements as specified in UL746C.APRIL 21, 2006 SUBJECT 2452 9UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL6.3.3 For the purposes of evaluation as specified in 6.3.2, an operator intended for indoor use shall besubjected to resistanc
45、e to impact testing in a normal room ambient of 23.0 2.0C (73.4 3.6F).6.4 Drainage6.4.1 An enclosure of an outdoor unit containing an electrical component that is mounted above gradeshall have provision for drainage when there is a knockout or un-threaded opening in the enclosure, orwhen there is ri
46、sk of condensation accumulation.6.4.2 A unit provided with a separate enclosure from the motor to terminate the supply system shall haveprovisions such that moisture shall not migrate down to the motor.Exception: A unit utilizing a supply cord for interconnection between enclosures shall not be requ
47、ired toemploy additional sealing against moisture migration if the cord and strain relief system complies with theWater Exposure Tests, Section 33.6.4.3 Each operator shall be provided with a portable pump intended to drain accumulated water from thetop of the cover. The pump shall:a) Automatically
48、activates water accumulates;b) Be supplied with a length of flexible cord Type SJW or SJTW of sufficient length to reach theedge of the pool; andc) Be provided with a length of tubing sufficient to reach the edge of the pool, or an outputfitting suitable for a standard garden hose.6.5 Mounting pads
49、or holes6.5.1 A unit shall be provided with means for mounting or support. Fittings necessary for proper mounting,such as brackets, hangers, or the like, shall be furnished with the unit.7 Mechanical Assembly7.1 A unit shall be assembled so that it will not be adversely affected by the vibration of operation. Brushcaps shall be tightly threaded or otherwise designed so as not to loosen.7.2 The means for preventing the loosening mentioned in 7.1 is to consist of more than friction betweensurfaces
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