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41 COLUMBUS AVE - BUILDING INSPECTION (4) RECEIVED _ [ S'I "' INSPECTIONAL SERVICES The Commonwealth of Massachusetts lOI4 APR 5 �TD�� Board of Building Regulations and Standards SALEM Massachusetts State Building Code,780 CMR Revised Mar 20// Building Permit Application To Construct, Repair, Renovate Or Demolish a One-or Two-Fancily Dwelling This Section For Official Use Only Building Permit Number: Date pp led: Building Official(Print Name) SignatureT�Date/ SECTION 1: SITE INFORMATION 1.1 Pro e ty Address: 1.2 Assessors Map&Parcel Numbers �t-t-t�'1k� �ut� 1.1a Is this an accepted street?yes x. no Map Number Parcel Number 1.3 Zoning Information: 1.4 Property Dimensions: Zoning District Proposed Use Lot Area(sq ft) Frontage(ft) 1.5 Building Setbacks(ft) Front Yard Side Yards Rear Yard Required Provided Required Provided Required Provided 1.6 Water Supply:(M.G.L c.40,§54) 1.7 Flood Zone Information: 1.8 Sewage Disposal System: Public❑ Private❑ Zone: _ Outside Flood Zone? Check if yesE3 Municipal❑ On site disposal system ❑ SECTION 2: PROPERTY OWNERSHIP' 2.1 ner'of Record: I cha 0-1 (ZU 01 gW Name Print) City,State,ZIP L4 W u myl L)sofuu q:g-2i6-n s' No.and Street Telephone Email Address SECTION 3:DESCRIPTION OF PROPOSED WORK'(check all that apply) New Construction X Existing Building❑ Owner-Occupied ❑ Repairs(s) ❑ Altera[ion(s) ❑ Addition ❑ Demolition ❑ Accessory Bldg.❑ Number of Units ther ❑ Specify: Brief Description of Proposed Work': S zXq p DYW V n 1+,a:lC. Solar .SySiPXyIS r VIPC� 1� SECTION 4:ESTIMATED CONSTRUCTION COSTS Item Estimated Costs: (Labor and Materials) Official Use Only 1.Building $ aQO.Fou� 1. Building Permit Fee:$ Indicate how fee is determined: 2.Electrical $x ❑Standard City/Town Application Fee ❑Total Project Costs(Item 6)x multiplier x 3.Plumbing $ 2. Other Fees: $ 4. Mechanical (HVAC) S List: 5.Mechanical (Fire S Su ression Total All Fees: $ Check No. Check Amount: Cash Amount: 6.Total Project Cost: $ a ,Sala 0 Paid in Full 0 Outstanding Balance Due: SECTION 5: CONSTRUCTION SERVICES 5.1 -Construction Supervisor License(CSL) 0�5 Z5 4 1 �$ 1q KX.me,s -:Z Qexrv�QX) License Number Expiration Date Name of CSL Holder s I " ai n Sty^& List CSL Type(see below) U No.and Street �{" 1 Type Description SQ�i LDS i Q �p U Unrestricted(Buildings u to 35,000 cu.ft.) R Restricted 1&2 FamilyDwelling Cityll'own,Stas�� ZIP M Maso nry RC Roofing Covering WS Window and Sidin � �c SF Solid Fuel Burning Appliances 513 _ DVCJ ilAn1 Ir,r6D VI Vtyu ,Atl I Insulation Telephone Email address C.Orvl D Demolition 5.2 Registered Home Improvement Contractor(HIC) \IIV(yt S0k0.rr),0_Vek)pe �-�-C- HIC Registration Number E pira on Dale HIC Com any Name or HIC R gistram Name 4a3 PN ADO Vk . Yv�GtSolcua vtvtvi:kso�tr. No.and Street Email address `_.Dyvt F�t'OYO l7'r $t}1004 "-[$'1305301p5 City/Town,State,ZIP Tele hone SECTION 6:WORKERS'COMPENSATION INSURANCE AFFIDAVIT(M.G.L.c.152.§ 25C(6)) Workers Compensation Insurance affidavit must be completed and submitted with this application. Failure to provide this affidavit will result in the denial of the Issuance of the building permit. Signed Affidavit Attached? Yes.........:A No........... ❑ SECTION 7a:OWNER AUTHORIZATION TO BE COMPLETED WHEN OWNER'S AGENT OR CONTRACTOR APPLIES FOR BUILDING PERMIT I,as Owner of the subject property,hereby authorize VIV 1✓N- SD IO-r to act on my behalf,in all matters roative to work authorized by this building permit application. ACO&WO 44)IQII 4t_ Z Print Owner's Name(Electronic Signature) Date SECTION 7b:OWNEW OR AUTHORIZED AGENT DECLARATION By entering my time below,I hereby attest under the pains and penalties of perjury that all of the information contained in th' p ' tion is true and accurate to the best of my knowledge and understanding. v fi a.r^ 2 Print O s r rized Agent's Name(Electronic Signature) - Date NOTES: 1. An Owner who obtains a building permit to do his/her own work,or an owner who hires an unregistered contractor (not registered in the Home Improvement Contractor(HIC)Program),will not have access to the arbitration program or guaranty fund under M.G.L.c. 142A.Other important information on the HIC Program can be found at www.mass eov/oca Information on the Construction Supervisor License can be found at www.mass.gov/dl)s 2. When substantial work is planned,provide the information below: Total floor area(sq.ft.) (including garage,finished basement/attics,decks or porch) Gross living area(sq.ft.) Habitable room count Number of fireplaces Number of bedrooms Number of bathrooms Number of half/baths Type of heating system Number of decks/porches Type of cooling system Enclosed Open 3. "Total Project Square Footage"may be substituted for"Total Project Cost" www.rnass.gow/diva `Yorkers' Compensation Insurance Affidavit: Builders/Contractors/Electricians/Plumbers Applicant Information Please Print Legibly Name (Business/Organization/Individual): Vivint Solar Developer, LLC Address:4931 North 300 West City/State/Zip:Provo, UT 84604 Phone #:801-704-9389 Are you an employer? Check the appropriate box: 'Type of project(required): I. ® I am a employer with 10 4. 0 1 am a general contractor and I 6. New construction employees (full and/or part-time).* have hired the sub-contractors 2.❑ I am a sole proprietor or partner- listed on the attached sheet. 7. Remodeling shipand have no employees These sub-contractors have 8. F1 Demolition � working for me in any capacity. employees and have workers' [No workers' comp. insurance comp. insurance.t 9. ❑ Building addition required.] 5. 0 We are a corporation and its 10.❑ Electrical repairs or additions 3.0 I am a homeowner doing all work officers have exercised their 11.❑ Plumbing repairs or additions myself [No workers' comp. right of exemption per MGL 12.0 Roof repairs insurance required.] t c. 152, §1(4), and we have no employees. [No workers' BE Other comp. insurance required.] -Any applicant that checks box kT:crust atsor fi,`1 oat the section below showing thti-r workers'compensatiaa policy mfarmation. t Homeowners who submit this affidavit indicating they are doing all work and then hire outside contractors must submit anew affidavit indicating such. Contractors that check this box must attached an additional sheet showing the name of the sub-contractors and state whether or not those entities have employees. If the sub-contractors have employees,they must provide their workers'comp.policy number. ram an employer that is providing workers'compensation insurance for my employees. Below is the policy and job site information. Insurance Company Name:New Hampshire Insurance Comany Policy# or Self-ins. Lic. #:029342228 Expiration Date:11-01-14 Job SiteAddress:�{{ I r0 Imo( �M b )L City/State/Zip:Sa�efl7no Attach a copy Of the workers' compensation policy declaration page(showing the policy number and expiration date). Failure to secure coverage as required under Section 25A of MGL c. 152 can lead to the imposition of criminal penalties of a fine up to $1,500.00 and/or one-year imprisonment, as well as civil penalties in the form of a STOP WORK ORDER and a fine of up to$250.00 a day against the violator. Be advised that a copy of this statement may be forwarded to the Office of Investigations of the DIA for insurance coverage verification. P do hereby ce under,j pai and penalties of perjury that the information provided above is true and correct. r'f l � Sienature: // , Date l��( 1� K/ Phone#: 801-704-9389 Official use only. Do not write in this area, to be completed by city or town official. City or Town; Permit/License # Issuing Authority(circle one)! 1. board of Health 2. Building(Department 3. City/Town Clerk 4. Electrical Inspector 5. Plumbing Inspector 6. Other Contact Person: Phone#: ®ffice of Consumer Affairs End Business Regulation 10 Park Plaza - Suite 5170 Boston, Massachusetts 02116 Dome Improvement Contractor Registration Registration: 170848 Type: Supplement Card VIVINT SOLAR DEVELOPER LLC. Expiration: v5/2u16 JAMES SHERMAN 4931 NORTH 300 WEST PROVO, LIT 84604 Update Address and return card.Mark reason for change. SCA i 4 20101.05ffr Address ❑ Renewal Employment Lost Card d%iea-nanwauneall�i of°C�/�.aseaa��eevfte *Expiration: fice of ConsumerAffairs&Business Regulation License or registration valid for individul use only ME IMPROVEMENT CONTRACTOR before the expiration date. If found return to: Office of Consumer Affairs and Business Regulation egistratiom 170g48 Type: 10 Park Plaza-Suite 5170 1/5/e^.016 Supplement Gird Boston,MA 02116 VIVINT SOLAR DEVELOPER LLC. JAMES SHERMAN 4931 NORTH 300 WEST PROVO, UT 84604 Undersecretary Not valid without signature --- c Massachusetts -Department of Public Safety Board of Building Regulations and Standards C nnstruction Supert-isor License:CS-045254 7( x ' a 3AbYES R SHERVAN 81 i48UN ST - A SAUGUS VA 01906 Expiration Commissioner 08/28/2014 WCONSULTING Wyssling Consulting 321 West Main Street Boonton, NJ 07005 Scott E. Wyssling, PE, PP, CME office (973) 335-3500 cell(201) 874-3483 fax (973) 335-3535 swyssling@wysslingconsulting.com April 14, 2014 Mr. Dan Rock, Project Manager Vivint Solar 24 Normac Road Woburn MA 01801 Re: Structural Engineering Services Robbins Residence 41 Columbus Avenue, Salem MA AR#3620390 4.5 kW System Dear Mr. Rock: Pursuant to your request, we have reviewed the following information regarding solar panel installation on the roof of the above referenced home: 1. Site VisiWerification Form prepared by a Vivint Solar representative identifying specific site information including size and spacing of rafters for the existing roof structure. 2. Design drawings of the proposed system including a site plan, roof plan and connection details for the solar panels. This information was prepared by Vivint Solar and will be utilized for approval and construction of the proposed system. 3. Photovoltaic Rooftop Solar System Permit Submittal prepared by Vivint Solar identifying design parameters for the solar system. 4. Photographs of the interior and exterior of the roof system identifying existing structural members and their conditions. Based on the above information we have evaluated the structural capacity of the existing roof system to support the additional loads imposed by the solar panels and have the following comments related to our review and evaluation: Description of Residence: The existing residence is typical wood framing construction with the roof system consisting of 2 x 6 dimensional lumber at 20" on center. The attic space is unfinished and photos indicate that there was free access to visually inspect the size and condition of the roof rafters. All wood material utilized for the roof system is assumed to be Spruce-Pine-Fir#2 or better with standard construction components. Our review of the photos of the exterior roof does not indicate any signs of settlement or misalignment caused by overstressed underlying members. Stability Evaluation: A. Wind Uplift Loading 1. Refer to attached ZEP calculations sheet for ASCE/SE1 7-10 Minimum Design Loads for Buildings and other Structures, wind speed of 100 mph based on Exposure Category "B" and 30 degree roof slopes on the dwelling areas. Ground snow load is 40 PSF for Exposure"B", Zone 2 per(ASCE/SEI 7-10). 2. Total area subject to wind uplift is calculated for the Interior. Edge and Corner Zones of the dwelling. Page 2 of 2 B. Loading Criteria • 10 PSF= Dead Load roofing/framing 40 PSF= Live Load (ground snow load) • 5 PSF= Dead Load solar Panels/mounting hardware Total Dead Load=15 PSF The above values are within acceptable limits of recognized industry standards for similar structures. Analysis performed of the existing roof structure utilizing the above loading criteria indicates that the existing rafters will support the additional panel loading without damage, if installed correctly. C. Roof Structure Capacity 1. The photographs provided of the attic space and roof rafters show that the framing is in good condition with no visible signs of damage caused by prior overstressing. 2. The dwelling owners shall be made aware that long term build-up of heavy snow conditions may produce deflections in the roof. If any deflection is noticed, then it is recommended that the solar panels be cleared of accumulated snow more than one (1) foot deep over a period of one week. If no deflections are visible under any snow loading over a period of time, then there is no need to clear the solar panels. D. Solar Panel Anchorage 1. The solar panels shall be mounted in accordance with the most recent "ZEP Code Compliant Installation Manual', which can be found on the ZEP website (zepsolar.com). If during solar panel installation, the roof framing members appear unstable, deteriorated, structurally compromised or deflect non-uniformly, our office should be notified before proceeding with the installation. 2. Maximum allowable pullout per lag screw is 235 Ibs/inch of penetration as identified in the National Design Standards (NDS) of timber construction specifications for Hem-Fir(North Lumber) assumed. Based on our evaluation, the pullout value, utilizing a penetration depth of 2 'W, is less than what is allowable per connection and therefore is adequate. Based on the variable factors for the existing roof framing and installation tolerances, using a thread depth of 2 %d' with a minimum size of 5116" lag screw per attachment point for panel anchor mounts should be adequate with a sufficient factor of safety. 3. Considering the roof slopes, the size, spacing, condition of roof, the panel supports shall be placed at and attached to no greater than every third roof rafter as panels are installed perpendicular across rafters and no greater than the panel length when installed parallel to the rafters (portrait). No panel supports spacing shall be greater than three (3) rafter spaces or 60" o/c, whichever is less. 4. Panel supports connections shall be staggered to distribute load to adjacent rafters. Based on the above evaluation, it is the opinion of this office that with appropriate panel anchors being utilized the roof system will adequately support the additional loading imposed by the solar panels. This evaluation is based on information supplied to us at the time of this report and current industry standards and practices. Should you have any questions regarding the above or if you require further information do not hesitate to contact me. � truly yours` Y a P QVI Scott E. Wys ' g, PE 0,50 MA License o. 50 9OF FGISTEQ'� FSSION4 WCONSULTING B0'OF 1'PVC CONDUIT FROM JUNCTION BOX TO ELEC PANEL U TW 0 V PV SYSTEM SIZE: 4.5 kW DC I I O -d~ T a I JUNCTION BOX ATTACHED TO I O O ARRAY USING ZEP ZS-GAB TO LL KEEP JUNCTION BOX OFF ROOF I I C Z o] Q S > Z z > W Z m I (18)Tnna Solar TSM-250 PA05.18 MODULES WITH A I O U 3 Ewhase M21e-60-2LL-S2x-ZC MICRO-INVERTER I U MOUNTED ON THE BACK OF EACH MODULE rn m < ¢ z z � o SHEET NAME: V Z _—_—_— - - _— -- J �- PV INTERCONNECTION POINT, a LOCKABLE DISCONNECT SWITCH, ANSI METER LOCATION, B UTILITY METER LOCATION SHEET NUMBER: PV SYSTEM SITE PLAN SCALE: 3/32"= 1'-0" d _ y T J z �G ♦. O NO80 Sm 00 yS0 Htt �$n v0 of 0 a m 2 O 0 O AO m m O y 0 Cp N D � r m � ° m II � o � O O n r D Z z0 D01NBTALLERLER:VIVINTSOL R /wy /��{/��J /I�y Robbins Residence PV 2.0 m y ROOF ^y MA LICNSTAENSE MAHEC 1708484044 Z9 Avi nt. J V l a 41 Sale.,C.I.mbu.MA 0 Ave V L m PLAN DRAWN BY:Van Hil AR 3620390 Lasl Modifeedd:a1299120114u UTILITY ACCOUNT NUMBER:8792669024 U C e N 1 MOUNTING (n Q'mw GO PV3.0 DETAIL YI V0-RxI-STAINLESS EMZ LEVELING FOOT VS-LF STEEL M.B.:TOROUP 1BEI Mhe. �~ (no—z COMP MOUNT RSCMA) C<(70 WASHER PAGKAGEO U WATERPROOFING BE T WITH COMP MOUNT Q PV MODULE,TYP.MOUNT ASNEEGEG TO RAFTERS OF COMP, SHINGLE ROOF,PARALLEL WITH PLANE OF ROOF vz: PV ARRAY TYP. ELEVATION SMILE„B MINIMUM S_ Z STAINLESS STEEL LAG SCREW TORQUE=2 flJhs. NOT TO SCALE _ O Y LEVELING FOOT ON COMP MOUNT ' PERMmEDLEVELING NOT TO SCALE O1 FOOT SPACING •O m LEV LING FOOT IZSLFBI A FRANJNGEELOWSHOWN r DASEE°FOR CLARITY C W MODULE 4 PV MODULE HYBRID INTERLOCK Q m O UP I I I O O u g _ II I � m < c CANTILELE35 SEE CODE CUNPCDSE LETTER FOR ALLOWABLE SPACING j j PHOTOVOLTAIC MODULE Z �j K Y N W W Z 0 Vl fq Q K I I I I I I I SHEET HYBRIDINTERLOCK LEVELING FOOT(ZSIFB) wTERLocK IZSILeI NAME: ROOF FRAMING LEVELING FOOT(ZG FB) Z Q LU O LU Q INTEgLGLK(ZS,LB) FERMITTE°`EYE""° IPV SYSTEM MOUNT DETAIL SHEET FOOT SPACING —�— NUMBER: '� _ MODULES IN PORTRAIT/LANDSCAPE SCALE:3/B°=T-0" O M NOT TO SCALE > Inverter Ratings(Guide Section 4) laxanv MehelMotlel Enpbese M21S60.2LL-52nZC MODULE DETAIL Max DC van Res, as vane O Conduit and Conductor Schedule //1r�� Mm Power®ao•c 21S Wena Tag oeecriglm Wlr Gauge #WConeotlon Conant Time Gonoun&a. y/ Nominal ACVdlage 210 Valb 1 Enpnase engage Fade-THWN-2 12 We 4 NIP-Free as N/A-Fria Nr U t Bare Copper Ground lEGC/GEC) .AWG 1 NIA-Imp Air N/A-From Nr Trine Solar 0PA05.1B Max AC Current B.9 —per so MODDULEULE Max oCPO Rating 20 —on pa 2 TNWN2 10 AWG 6 FVC V-t' ^` Max Number ofParegsl uil 17 2 TNWN'2-Grwntl BRWG 1 PVCpre J TNWN2 .AWG 1 3 PVC I 0'-1' y J TNWN2-Ground .AWG 1 PVG P-1' NOTES FOR INVERTER CIRCUITS(Gultla Section B and 91: (n¢m w 1.)IF UTILITY REQUIRES A VISIBLE-BREAK SWITCH,DOES THIS PV Module Ratings @ STC(Guide Section 5) E i SWITCH MEET THE REQUIREMENTS? YES NO %NA Matlel MekelModel mi MICRO Trine Soler T$M-250 PAD5.18 -IM21 l_S6S2LL-52x-ZC Mex Parser-0oim Current(imp) 7.89 Amps (n iT_z MICRO-INVERTER AT 2,)IF GENERATION METER REQUIRED.DOES THIS METER Max Power-point Voltage oral 30.4 Vans m0 EACH MODULE,ATTACHED SOCKET MEET THE REQUIREMENTS? OpanLlmuit Voltage(voc) 37.2 Vona �QmU WITH ZEP HARDWARE YES NO XNA ahod-Greu4 Current lisp) 8a7 Amps )a) 3')SIZE PHOTOVOLTAIC POWER SOURCE DC)CONDUCTORS -lax Series Fuse(OCPD) 15 Amps F BASED ON MAX CURRENT ON NEC 690.53 SIGN OR OCPD Nominal Maximum Popper at o I U(Firma, 1 240 Wade O r RATING AT DISCONNECT. Maximum System Voltage I 10006ECy600(Uy 4.)SIZE INVERTER OUTPUT(ACI CONDUCTORS ACCORDING Voc Temperature Coasts nl -0.32 %I°C LIB MICROI NVERTER CONNECTION TO INVERTER OCPO AMPERE RATING(See Guide Section 9). TO ENGAGE TRUNK CABLE 5.)TOTALOF 2 INVERTER OGPD(s).ONE FOR EACH NOTES FOR ARRAY CIRCUIT WRING(Guide Secion 6 and 8 and Appendix Dl: PV CIRCUIT,DOES TOTAL SUPPLY BREAKERS COMPLY L WITH 120%BUSBAR EXCEPTION IN 1.)Lowest expected ambient temperature based on ASHRAE minimum mean extreme NEC 690.6,1B)(2ga)? RYES NO dry bulb temperature for ASHRAE location most similar to installation location: -19-C l(IVl Signs(See Guide Section 7) 2.)Highest continuous ambient temperature based on ASHRAE highest month 2%dry bulb el BARE CU GROUND r temperature for ASHRAE location most similar to Installation location: 39•C (GROUNDING ARRAY) Sign for inverter OCPD and AC Discerned: 3J 2005 ASHRAE fundamentals is design Fortemperaturesthan do not exceedrl conductors in Unitetl States(Palm Springs, at is st CS').For leas than 9 ing the outd or dsign Solar PV System AC Point of Connection rem-mpGntea apnm apnapit at leaetDs•above met and using me omappr assign AC Ou1pof Current 1E.400000 Amps in of 47-C or less(all of United States), JJam�• Nominal AC V011age Pill V0pS a.)12 AWG,90°C derduolOrs ere generally acceptable for modules with lsc or 7.68 Amps Y> or less"an protected by a 12-Amp or smaller fuse. m THIS PANEL FEDIPLE By bJ 10 AWG,90-C conductors are generally acceptable for modules with Ise of RG Amps (UTILITYY AND AND SOLAR) par less wfien protectedb a I 5-Amp or smaller fuse. 15 d o PV CIRCUIT 1: 12 MODULES/PARALLEL an 0 0 S o POINT OF DELIVERY G: as so AND INTERCONNECTION m N rc ./` • • • J` N N wbe U Q zed Q x _____ _1 VISIBLE/LOCKABLE COMBINER SREC/ANSI 'KNIFE'A/C FUSED FUSED - w PV CIRCUIT 2: 6 MODULES/PARALLEL 1 i PANEL METER DISCONNECT DISCONNECT al, i EXISTING ENTRANCE Q Q U 3a E 1.0 I O CONDUCTORS pHj Z Q K t RATED:200A ? ? o © • • • o o ; ,� kL ■ M SHEET SUPPLY-SIDE NAME: t Y SOLAR TAP N • • • N J` I nEC r0512(A) W 240V/20]A Z _ _______ ___ _ _ _______ _ ______ ______ _ _______ ♦ PANEL J 0 VisionMetering Siemens I r Q V2S-2S #LNF222R 2 3 3 60 p 1 A/240V 3 3 y TO EXISTING E 1.0 JUNCTION BOX E 1.0 E 1.0 E 1.0 UNFUSED E 1.0 E 1.0 LOAD-CENTER SHEET WITH IRREVERSIBLE NUMBER: GROUND SPLICE NEMA3 O NOTE: NEUTRAL CONDUCTOR(S)OMITTED FOR CLARITY ALL INVERTER OUTPUT CIRCUITS WILL HAVE A NEUTRAL CONDUCTOR LU Vivint Solar - PV Solar Rooftop System Permit Submittal 1. Project Information Project Name: MICHAEL ROBBINS Project Address: 41 Columbus Ave,Salem MA - A.System Description: The array consists of a 4.5 kW DC roof-mounted Photovoltaic power system operating in parallel with the utility grid.There are(18)250- watt modules and(18)215-watt micro-inverters,mounted on the back of each PV module.The array includes(2)PV circuit(s).The array is mounted to the roof using the engineered racking solution from Zep Solar. B.Site Design Temperature: (From Boston Logan INT'L ARPT weather station) Average low temperature: -21.1 °C (-5.98°F) Average high temperature: 38.4°C (101.12°F) C. Minimum Design Loads: Ground Snow Load: 40 psf (State Board BR&S) Design Wind Speed: 100 mph (State Board BR&S) 2. Structural Review of PV Array Mounting System: A.System Description: 1.Roof type: Comp.Shingle 2.Method and type of weatherproofing roof penetrations: Flashing B. Mounting System Information: 1.Mounting system is an engineered product designed to mount PV modules 2.For manufactured mounting systems,following information applies: a.Mounting System Manufacturer: Zep Solar b.Product Name: ZS Comp c.Total Weight of PV Modules and mounting hardware: 774 Ibs d.Total number of attachment points: 34 c.Weight per attachment point: 22.76 Ibs/square foot f.Maximum spacing between attachment points: *See attached engineering talcs g.Total surface area of PV array: 316.98 square feet h.Array pounds per square foot: 2.44 Ibs/square foot i.Distributed weight of PV array on roof sections: -Roof section 1: (12)modules,(21)attachments 24.57 pounds per square foot -Roof section 2: (6)modules,(13)attachments 19.84 pounds per square foot vivint. solctr 3. Electrical Components: A. Module (UL 1703 Listed) Qty Trina TSM 250-PA05.18 18 modules Module Specs Pmax-nominal maximum power at STC - 250 watts Vmp-rated voltage at maximum power - 30.3 volts Voc-rated open-circuit voltage - 37.6 volts Imp-rated current at maximum power - 8.27 amps Ise-rate short circuit current - 8.85 amps B.Inverter (UL.1741listed) Qty Enphase M215-60-2LL-S22 18 inverters Inverter Specs 1. Input Data (DC in) Recommended input power(DC) - 260 watts Max.input DC Voltage - 45 volts Peak power tracking voltage - 22V-36V Min./Max.start voltage - 22V/45V Max.DC short circuit current - 15 amps Max.input current - 10.5 amps 2. Output Data (AC Out) Max.output power - 215 watts Nominal output current - 0.9 amps Nominal voltage - 240 volts Max.units per PV circuit - 17 micro-inverters Max.OCPD rating - 20 amp circuit breaker C.System Configuration Number of PV circuits 2 PV circuit 1 - 12 modules/inverters (15)amp breaker PV circuit 2 - 6 modules/inverters (15)amp breaker I vivint. solar D. Electrical Calculations 1.PV Circuit current PV circuit nominal current 10.8 amps Continuous current adjustment factor 125% 2011 NEC Article 705.60(B) PV circuit continuous current rating 13.5 amps 2.Overcurrent protection device rating PV circuit continuous current rating 13.5 amps Next standard size fuse/breaker to protect conductors 15 amp breaker Use 15 amp AC rated fuse or breaker 3.Conductor conditions of use adjustment(conductor ampacity derate) a.Temperature adder Average high temperature 38.4°C (101.12°F) Conduit is installed 1°above the roof surface Add 22°C to ambient 2011 NEC Table 310.15(B)(3)(c) Adjusted maximum ambient temperature 60.4°C (14072°F) b.PV Circuit current adjustment for new ambient temperature Derate factor for 60.4°C (14072°F) 71% 2011 NEC Table 310.15(B)(2)(a) Adjusted PV circuit continuous current 19 amps c.PV Circuit current adjustment for conduit fill Number of current-carrying conductors 6 conductors Conduit fill derate factor 80% 2011 NEC Tabte 310.15(B)(3)(a) Final Adjusted PV circuit continuous current 23.7 amps Total derated ampacity for PV circuit 23.7 amps Conductors(tag2 on 1-line)must be rated for a minimum of 23.7 amps THWN-2(90°C)#14AWG conductor is rated for 25 amps (Use#14AWG or larger) - 2011 NEC Table 310.15(B)(16) 4.Voltage drop(keep below 3%total) 2 harts: 1.Voltage drop across longest PV circuit micro-inverters (from modules to j-box) 2.Voltage drop across AC conductors(from j-box to point of interconnection) 1.Mirco-inverter voltage drop: 0.18% The largest number of micro-inverters in a tow in the entire array is 6 inCircuit 1.According to manufacturer's specifications this equals a voltage drop of 0.18%. 2.AC conductor voltage drop: , =I x R x D (=240 x 100 to convert to percent) _ (Nominal current of largest circuit)x(Resistance of#14AWG copper)x (Total wire mn) _ (Circuit 1 nominal current is 10.8 amps)x(0.0031952)x(160� -r(240 volts)x(100) 2.29% Total system voltage drop: 2.47% viviW. solar - 402014 3620390 rl-Zepulator ZepSotar Engineering Calculations 3620390 r1 Name: Street Address:41 Columbus Ave Email: Suite/PO#: Phone: City,State,Zip:Salem,Massachusetts 01970 Country:United States System Details Module Manufacturer Trina Solar Mounting System Zep Solar PV Module TSM-250-PA05.18 Manufacturer Quantity of PV Modules 12 Mounting System Type ZS Comp Array Size (W) 3.000 Roof type Composition Shingle Attachment Type Comp Mount,Type C Module-level Enphase Energy-M215-Z electronics http:/Aww.zepulator.caWprojects/53523isummar wgineering_print 114 IVZ2014 3620390 r1-Zepulator Engineering Calculations Design Variables Description(Symbol) Value Unit Module Orientation Landscape Module Weight 44.8 Ibs Average Roof Height(h) 25.0 ft Least Horizontal Dimension(Ihd) 25.0 ft Edge and Corner Dimension"a" 3.0 ft Roof Slope(0) _ 30.0 deg Rafter/Truss spacing 16.0 in Rafter/Truss dimension Min.nominal framing member depth of 4" Basic Wind Speed(V) 110 mph Exposure Category B Ground Snow Load(Pg) 40 psf Risk Category II Topographic Factor(Kif) 1.0 Thermal Factor for Snow Load(Ct) 1.2 E)posure Factor for Snow Load(Ce) - ` 0.9 Effective Wind Area 10 ft2 Snow Load Calculations (Using calculation procedure of ASCE 7-10 Chapter 7) Description (Symbol) Interior Edge Corner Unit Flat Roof Snow Load(Pf) 30.2 30.2 30.2 psf Slope Factor(Cs) 0.7 0.7 0.7 Roof Snow Load 22.0 - 22.0 22.0 psf Wind Pressure Calculations (Using simplified procedure of ASCE 7-10 Chapter 27) Description (Symbol) Interior Edge Corner Unit Net Design Wind Pressure uplift(Pne w up) -21.8 -25.5 -25.5 psf Net Design Wind Pressure downforce(Pne130 down) 19.9 19.9 19.9 psf http:/Av zepulatu.con/projects/53523Isurrrroyfengineering_print 2/4 4/2/2014 3620390 rl-Zepulator ' Adjustment Factor for Height and Exposure Category(A) 1.0 1.0 1.0 Design Wind Pressure uplift(Wup) -21.8 -25.5 -25.5 psf Design wind Pressure downforce(Wdrwn) 19.9 19.9 19.9 psf ASD Load Combinations (Using calculation procedure of ASCE 7-10 Section 2.4) Description(Symbol) Interior Edge Corner Unit Dead Load(D) 2.5 2.5 2.5 psf Snow Load(S) 19.0 19.0 19.0 psf Load Combination 1 (D+0.75'(0.6'Wdm,,)+0.75"S) 23.5 23.5 23.5 psf Load Combination 2(D+0.6'Wdn) 14.1 14.1 14.1 psf Load Combination 3(D+S) 18.7 18.7 18.7 psf Uplift Design Load(0.6'D+0.6'Wup) -11.8 -14.0 -14.0 psf Mabmum Absolute Design Load(Pab) 23.5 23.5 23.5 psf Spacing Calculations Description(Symbol) Interior Edge Corner Unit Max allowable spacing between attachments 72.0 72.0 72.0 in User selected spacing between attachments given a rafter/truss spacing of 16.0 in 64.0 64.0 64.0 in Max cantilever from attachments to perimeter of PV array 24.0 24.0 24.0 in Distributed and Point Load Calculations (In conformance with Solar ABC's Expedited Permit Process for PV System (EPP)) Description(Symbol) Value Unit Weight of Modules 537.6 Ibs Weight of Mounting System 53.33 Ibs Total System Weight 590.93 Ibs Total Array Area 211.36 ft2 Distributed Weight 2.8 psf Total Number of Attachments 21 Weight per Attachment Point 28.14 psf http:/Aa .zepulata.conVprojmts/53523/sunvnar,fe gineeringyrint 34 4/2/2014 3620390 r1-Zepulator :/A+ ..z ulator.coni/ je is/535231summ en ineerin riot Mro ea ag M s s� 414 4/2/2014 3620390 r2-Zepulator ZepSolar Engineering Calculations 3620390 r2 Name: Street Address:41 Columbus Ave Email: SuitelPO#: Phone: City,Slate,Zip:Salem,Massachusetts 01970 Country:United States System Details Module Manufacturer Trina Solar Mounting System Zap Solar PV Module TSM-250-PA05.18 Manufacturer Quantity of PV Modules 6 Mounting System Type ZS Comp Array Size(kM 1.500 Roof type Composition Shingle Attachment Type Comp Mount,Type C Module-level _ Enphase Energy-M215-Z electronics htt):/A+ ..zepulator.conVprojmts/52848Isurmiaryenginmringyrint 114 4/2/2014 3620390 r2-Zepulator Engineering Calculations Design Variables Description (Symbol) Value Unit Module Orientation Landscape Module Weight 44.8 Ibs Average Roof Height(h) 25.0 ft Least Horizontal Dimension(Ihd) 25.0 ft Edge and Corner Dimension"a" 3.0 It Roof Slope(0) 30.0 deg Rafter/Truss spacing 16.0 in Rafter/Truss dimension Min.nominal framing member depth of 4" Basic Wind Speed(V) 110 mph Exposure Category B Ground Snow Load(Pg) 40 psf Risk Category II Topographic Factor(Kit) 1.0 Thermal Factor for Snow Load(Ct) 1.2 Exposure Factor for Snow Load(Ce) 0.9 Effective Wind Area _ 10 ft2 Snow Load Calculations (Using calculation procedure of ASCE 7-10 Chapter 7) Description(Symbol) Interior Edge Corner Unit Flat Roof Snow Load(Pt) y 30.2 30.2 30.2 psf Slope Factor(Cs) 0.7 0.7 0.7 Roof Snow Load 22.0 22.0 22.0 psf Wind Pressure Calculations (Using simplified procedure of ASCE 7-10 Chapter 27) Description (Symbol) Interior Edge Corner Unit Net Design Wind Pressure uplift(Pnet30_up) -21.8 -25.5 -25.5 psf Net Design Wind Pressure downforce(Pnet3o down) 19.9 19.9 19.9 psf http:/Amkw.zepulata.cmVprojects/5280sunirer 4mginmringjxint 2/4 4/2/2014 3620390 r2-Zepulator Adjustment Factor for Height and Exposure Category(A) 1.0 1.0 1.0 Design Wind Pressure uplift(Wvp) -21.8 -25.5 -25.5 psf Design Wind Pressure downforce(Wmwn) 19.9 19.9 19.9 psf ASD Load Combinations (Using calculation procedure of ASCE 7-10 Section 2.4) Description(Symbol) Interior Edge Corner Unit Dead Load(D) 2.5 2.5 2.5 psf Snow Load(S) 19.0 19.0 19.0 psf Load Combination 1 (D+0.75"(0.6'Wd.n)+0.75'S) 23.5 23.5 23.5 psf Load Combination 2(D+0.6'Wdown) 14.1 14.1 14.1 psf Load Combination 3(D+S) 18.7 18.7 18.7 psf Uplift Design Load(0.6`0+0.6'Wup) -11.8 -14.0 -14.0 psf MaAmum Absolute Design Load(Pabs) 23.5 23.5 23.5 psf Spacing Calculations Description (Symbol) Interior Edge Corner Unit Max allowable spacing between attachments 72.0 72.0 72.0 in User selected spacing between attachments given a rafter/truss spacing of 16.0 in 64.0 64.0 64.0 in Max cantilever from attachments to perimeter of PV array 24.0 24.0 24.0 in Distributed and Point Load Calculations (In conformance with Solar ABC's Expedited Permit Process for PV System (EPP)) Description(Symbol) Value Unit Weight of Modules 268.8 Ibs Weight of Mounting System 31.02 Ibs Total System Weight 299.82 Ibs Total Array Area 105.68 ft2 Distributed Weight 2.84 psf Total Number of Attachments 13 `1 Weight per Attachment Point 23.06 psf http:/Mw .zepulata.coni/projects/52848/sumnwr)engineering_print 314 4/2/2014 3620390 r2-zepulator http:/Aµ .zepulator.conVprojects/52SMsumnuryf gineeringyrint 414