1、Standard for InstallingResidentialGenerator SetsNECA 406-2003AMERICAN NATIONAL STANDARDPublished byNational Electrical Contractors AssociationStandard for InstallingResidentialGenerator SetsNECA 406-2003An AmericanNational StandardPublished byNational Electrical Contractors Associationiii nForeword
2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v1. Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.1 Equipment Included . . . . . . .
3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.2 Equipment Excluded . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.3 Related Items . . . . . .
4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11.4 Regulatory and Other Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12. Planning the Installatio
5、n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22.1 Whole House Design (One Panelboard) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22.2 Essential Loads Design (Two Panelboards) . . . . . .
6、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22.3 Generator Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33. Selecting Other System Components . . . . . . . . . . .
7、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93.1 Generator Output Conductors (Feeder) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.2 Transfer Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .93.3 Generator Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113.4 Utility Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .113.5 Essential Loads Panelboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114. Installing the Generator Set and Associated Components . . . . . . . . . . . . . .
10、 . . . . . . . . . . . 124.1 Generator Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124.2 Load Transfer Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11、 . . . . . . . . . . . . . . . . . . . 134.3 Generator Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134.4 Utility Disconnect Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12、 . . . . . . . . . . . . . . . . . . . 134.5 Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144.6 Essential Loads PanelboardLocation and Electrical Subfeed . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . 145. Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 5.1 One Panelboard (Whole House Design) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 5.
14、2 Two Panelboards (Essential Loads Design) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155.3 Control Circuitry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166.
15、Final Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 6.1 Generator Set Fuel Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176.2 Generator Set Bat
16、tery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 6.3 Generator Set Coolant and Lubricant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177. Energizing and Tes
17、ting the Generator Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187.1 Pre-Energizing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187.2 Starting Engine for the First Time . . . . . .
18、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187.3 Engine Governor Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18Table of Contents7.4 Voltage Regulator Adjustment . . .
19、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197.5 Performance Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198. Final Procedures . . . . . . . .
20、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208.1 Site Clean-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208.2 Punchlist and Acceptance . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Annex A: Reference Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21NECA 406 Standard for Installing Residential Generator Setsn i
22、vv nNational Electrical Installation Standards are intend-ed to improve communication among specifiers, pur-chasers, and suppliers of electrical construction ser-vices. They define a minimum baseline of qualityand workmanship for installing electrical productsand systems. NEIS are intended to be ref
23、erenced incontract documents for electrical construction pro-jects. The following language is recommended:Generator sets for on-site power generation atone-family dwellings shall be installed in accor-dance with NECA 406-2003, Standard forInstalling Residential Generator Sets (ANSI).Use of NEIS is v
24、oluntary, and the National ElectricalContractors Association assumes no obligation or lia-bility to users of this publication. Existence of astandard shall not preclude any member or non-member of NECA from specifying or using alternateconstruction methods permitted by applicable regu-lations.This p
25、ublication is intended to comply with the edi-tion of the National Electrical Code (NEC) in effectat the time of publication. Because they are qualitystandards, NEIS may in some instances go beyondthe minimum requirements of the NEC. It is theresponsibility of users of this publication to complywith
26、 state and local electrical codes when installingelectrical products and systems.Suggestions for revisions and improvements to thisstandard are welcome. They should be addressed to:NECA Standards leaking ordamaged hoses should be re-tightened orreplaced as required. Check drive belts to insure they
27、are in good con-dition and properly tensioned; adjust or replaceas necessary. Check engine mounting bolts for tightness; re-tighten if necessary.7 . 2 Starting Engine for the First T i m ea) Insure that all pre-energizing procedures in 7.1have been completed correctly.b) Press the starter switch.c)
28、If engine fails to start within 30 seconds, releasethe starter switch and allow the starting motor tocool for two minutes before trying again.d) If engine fails to start after four attempts, conductan inspection to determine the cause.7 . 3 Engine Governor AdjustmentIf the generator AC output voltag
29、e or frequency areoutside of manufacturers specifications, adjust theengine governor following manufacturers instruc-tions.7. Energizing and Testing theGenerator Setn 18Energizing and Testing the Generator Set19 n7 . 4 Voltage Regulator AdjustmentSome residential generators are equipped with volt-ag
30、e regulators in addition to engine governors. If theoutput AC power frequency is correct but the voltageis not within the specified tolerances, adjust the volt-age regulator following manufacturers instructions.7 . 5 Performance Te s t i n ga) For routine operational checks and load tests, runthe en
31、gine at no load for about five minutes to warmup.b) Apply a load equal to or greater than 35 percentof the generator nameplate rating.c) Operate the unit until temperatures stabilize.8 . 1 Site Clean-Upa) Vacuum all scrap, wire, dust and other debrisfrom the generator, transfer switch, panelboard(s)
32、and associated equipment. Do not use compressedair to blow debris out of the generator, since is maycause debris to settle inside devices and impair theirability to function.b) Replace all parts and covers. Check for anypinched wires and close all doors. Make sure theenclosure parts are properly al
33、igned and fastenedsecurely.c) When recycling options are available at the jobsite, separate used packing materials by type andrecycle them.d) Dispose of non-recyclable packing materialsappropriately.8 . 2 Punchlist and Acceptancea) Walk through project with owner/architect/gener-al contractor.b) Tou
34、ch-up and repair all minor defects.c) Turn over all manuals, spare parts, and a set ofspecial tools (where required) for generator adjust-ments or tamper-proof hardware, to the owner/archi-tect/general contractor owner. Obtain a deliveryreceipt.8. Final Proceduresn 2021 nThis publication, when used
35、in conjunction with the National Electrical Code and generator manufacturers lit-erature, provides sufficient information to install and maintain generator sets. The following publications mayalso provide useful information:National Fire Protection Association1 Batterymarch ParkP.O. Box 9101Quincy,
36、Massachusetts 02269-9101(617) 770-3000 tel(617) 770-3500 faxwww.nfpa.orgNFPA 37-2002, Standard for the Installation and Use of Stationary Combustion Engines and Gas TurbinesNFPA 70-2002, National Electrical Code (ANSI)NFPA 110-1999, Emergency and Standby Power Systems (ANSI)National Electrical Manuf
37、acturers Association1700 North Thirteenth Street, Suite 1847Rosslyn, VA 22209(703) 841-3200 tel(703) 841-3300 faxwww.nema.orgMG 2-1989 (R1994), Safety Standard for Construction and Guide for Selection, Installation, and Use of ElectricMotors and GeneratorsCurrent National Electrical Installation Sta
38、ndards published by NECA:NECA 1-2000, Standard Practices for Good Workmanship in Electrical Contracting (ANSI)NECA 100-1999, Symbols for Electrical Construction Drawings (ANSI)NECA 101-2001, Standard for Installing Steel Conduits (Rigid, IMC, EMT)NECA/AA 104-2000, Recommended Practice for Installing
39、 Aluminum Building Wire and Cable (ANSI)NECA/NEMA 105-2002, Recommended Practice for Installing Metal Cable Tray Systems (ANSI)NECA 111-2003, Standard for Installing Nonmetallic Raceways (RNC, ENT, LFNC) (ANSI)NECA 200-2002, Recommended Practice for Installing and Maintaining Temporary Electrical Po
40、wer atConstruction Sites (ANSI)Annex A: Reference Standards(This annex is not part of the standard)NECA 202-2001, Recommended Practice for Installing and Maintaining Industrial Heat Tracing Systems (ANSI)NECA 230-2003, Standard for Selecting, Installing and Maintaining Electric Motors and Motor Cont
41、rollers(ANSI)NECA/FOA 301-1998, Standard for Installing and Testing Fiber Optic CablesNECA 305-2001, Standard for Fire Alarm System Job Practices (ANSI)NECA 400-1998, Recommended Practice for Installing and Maintaining Switchboards (ANSI)NECA 402-2001, Recommended Practice for Installing and Maintai
42、ning Motor Control Centers (ANSI)NECA/EGSA 404-2000, Recommended Practice for Installing Generator Sets (ANSI)NECA 405-2001, Recommended Practice for Installing and Commissioning Interconnected Generation Systems(ANSI)NECA 406-2003, Standard for Installing Residential Generator Sets (ANSI)NECA 407-2
43、002, Recommended Practice for Installing and Maintaining Panelboards (ANSI)NECA 408-2002, Recommended Practice for Installing and Maintaining Busways (ANSI)NECA 409-2002, Recommended Practice for Installing and Maintaining Dry-Type Transformers (ANSI)NECA/IESNA 500-1998, Recommended Practice for Ins
44、talling Indoor Commercial Lighting Systems (ANSI)NECA/IESNA 501-2000, Recommended Practice for Installing Exterior Lighting Systems (ANSI)NECA/IESNA 502-1999, Recommended Practice for Installing Industrial Lighting Systems (ANSI)NECA/BICSI 568-2001, Standard for Installing Commercial Building Teleco
45、mmunications Cabling (ANSI)NECA/MACSCB 600-2003, Recommended Practice for Installing and Maintaining Medium-Voltage Cable (ANSI)NECA 406 Standard for Installing Residential Generator Setsn 22National ElectricalContractors Association3 Bethesda Metro CenterSuite 1100 Bethesda, MD 20814301-657-3110 fax: 301-215-4500www.neca-neis.orgStandards & SafetyIndex: NECA 4067K/2-04NATIONAL ELECTRICAL INSTALLATION STANDARDS
