Construction Specifications Vol 2 Excerpt - East Brimfield Dam.pdf

1• li'! c.]

• 'W, SERIAL No. CIV ENG -19-016-58-49

THAMES RIVER FLOOD CONTROL PROJECT

EAST BRIMFIELD

DAM

QUINEBAUG. RIVER, MASSACHUSETTS

':-. _" .• '~j, - "'. r:- : -i'~, ..': _~ ,-:_,,'~ ~-: ~"'::r'J yc.~Y

:co 1'.0:1: R~~~Gv~ FHOi:i lc'IL~

SPECIFICATIONS

FOR THE

CONSTRUCTION OF DAM

AND

APPURTENANT STRUCTURES

VOLUME 2 OF 2

__ .. .r,C~lil~"iitin __

U.S. ARMY ENGINEER DIVISION, NEW ENGLAND

CORPS OF ENGINEERS

BOSTON,MASS.

ARMY.NED·BOSTON FEBRUARY 1958

f

I

Serial No. CIYENG-19-0l6-58..49

CONNECTIC1.iT RIVER FLOOD Cm.:TROL rnOJECT

STECIF'ICATIONS

FOR

CONSTRUCTION

OF

EAST BRIMFIELD DAM

ArpURTENA~~ STRUCTURES

QUINEBAUG RIVER, VERMONT

10 FE:'RUARY 1958

VO!J)ME ;.:: OF 2

Teehcica1 Prc','isie'ns

Section 13-25

U. S. AEMY ENGINJ<~EP. DIVISION, NEVI ENUIAND

CORPS OF ENGH.1EERS LOmON, lo'ASSACHUSETTS

TABLE' OF CONTENTS

,Volume 2 of 2

Section No. 13 IJII'TERIOR ELECTRICAL ~IORK

14 EX'J.'ERIOR ELECTRICAL WORK

15 SXTBRIOR IJR,UNAGE

16 UTILITY BUILDING

17 PLU!'iBING

18 HEATH!G SYS'J'EM

19 WATER SYSTEM

20 SEHAGE DISPOSAL SYSTEM

21 PAINTING

22 ROAm-I.\YS

23 PRI~IE COAT AND BITill1INOUS

SURFACE TREATMENT

211 MISCELLANEOUS ITEMS

25 FERTILIZING AND SZ:!:DH!G

J

SPECIFI CATIONS

Pl1.RT IV

TECHNICAL PRaJISIONS

Section 13

INTERIOR ELECTRIC"L V{QR!\

INDEX

Pc.r"gr"ph Title Page

13-01 SCOPE 13-1

13-02 GEl';"ERi!.L 13-1

13~3 STi,NDARl) RULES AND SPECIFICATIONS 13-2

13-04 GENERJ,L DESCRIPTION 13-3

13-05 GROUNDING 13-3

13~06 ,nRING 13-4

13-07 INSULATED W"IRE AHD C..).BLE 13-4

13-08 WIRING METHODS_ 13-8

13-09 OUTLETS 13-9

13-10 WALL RECEFTI,CLES 13-10

13-11 WALL SViITCHES 13-10

13-12 PANELBO;:,RDS 13-11

13-13 C"BItETS 13-11

13-14 LIGHTING FIXTLrrlES 13-11

13-15 SERVICE E~UIPMENT 13-12

• 1.5-16 £elECTRIC HEli.TERS 13-12

13-17 THER1\lOSTi,TS FOR INTAKE STRUCTURE 13-13

13-18 SWITCliBOI,RD n: Hl-r,'.KE STRUCTUHE 13-13

13-19 EQTJI PMElIT CGm2CTIONS 13-19

13-20 l.lOTORS 13-20

13-21 MOTOR COUTROL 13-20

, 13-22 MOTOR DI SCONllECT MEj..NS 13-21 l-i Ci

13-23 TESTS 13-21

13-24 GUARAI'!l'EE 13-21

13-25 PAYMENT 13-21

SPECIFICATIONS

PART IV

TECHNICAL PROVISIONS

Section 13, INTERIOR ELECTRICAL WORK

'(a) The work c OITered by this section of the specifications consists of ,furnishing aU plant, labor, equipment and materials, and performing all operations, required for the construction of'the electric' power, lighting and control systems ready for operation, oompl",te in strict ti:ccordance with this section of the specif,ications and the contract drawings.

, '(b) The work inc ludes, but is not limited to~ the following major features, for the Utility Building, and Intake structure I

, The furnishing and' the 'i~st"ilation of aU neoessary o'onnections 'to the' s"ii'tchbo'ard, gasoline driven, electric' generator set and gate operating motors and heater's;' aU"wirin'g, ooncuits, outlets, lighting fixtures, lamps, floodlights, lighting panalboard, control equipment fittings and jun9tion boxes.

13-02. GENERAL,

'(a) The instaUations, shall oomply with ,the applioable rules and' 'spaoifioations ,listod' beloW exoept where otherwise noted on the drliwings .or speoified herein.

AU "lectrical materials shall be new and as approved by the Underwr'itors' Laboratories, Ina.,exoept as otherwise speoi fied horein. 'Defective equipment or equipment ,damaged in' the course of installation or test shall be replaced or repaired in an approved mannor; Lamps shall be furnished and installed by the Contractor,' The drawings indicate, tm extent and general arrangement of the conduit and wiring systems, If any departures' from,"the, drawings are deemed neoessary by the Contractor, 'details of, such departures and the reasons therefor shall be submittod for approval as soon as praoticable ;e.rid"within '30 cc,10ndar days after date of receipt by him of notioe to proceed. No suah departures shall be mil de' without' prior, written approval.

(b) Sto~dard Products. Except,as herein specified, the "materiuls to be Turnish0d under this speci~ fieation shall be the, standard products of manufacturers, ' regularlyengnged in the produotion of, such equipment and" shall be the manuf<leturer' s latest standard desi~n.o

13-1

(0) Mato~i~ls and Equipment Schedules.

(1) 'As sodh as practicable and within 120 calendar days a£tor the d~te of reoeipt by him of notice to proceed (exoept as,ouhenvise sp0cified) before any materials, fixtures, or equipment aro purchasod, the Contractor shall submit for approval a complete list, in,quadruplicate of materials, fixtures, and equipment'tobo incorporated in the work (the above shall be furnished within 30 days for Utility ,Bu~lding).,'Tha list shall includo catalog numbers, cruts, diagrams. drawings, lind such otper do'scriptive 'data as may be 'required. No consideration will be given to pnrtial lists su1:)mitted from time ,to time', Approv:nl <;>f ,mo,teria;!'s will be

'bnsed on manufe.cturers I pUblished' ratings. Any mo.terio.ls, 'fii<;tures 'and equipment listad which ar" not in nccordance ~ith the spocification requirements may be 'rejected.

(2) Tho: Coritructor'shall'sub~it; within '120 cI11endm:, days of date of roco'ipt. by him of notice to proc'eed, doto.iled r;imensioned drawings' "nd dllta descriptive of all equipment powered by electric motors, switchboard and 0.11 its equipment, controls, lighting distribution panel boards, li~ting f'ixturo s, conduits·, wJr9' and acpes,sories which he ,proposes to install. The:Contr~ct~rwill be held responsible for any delay in the plo.ci,pg' of th';l, floors with embedded conduits; should'he fail'to submit equipment data and required drawings.,within ,the' time' specified above.

13-03. STANDARD RULES AND'SPECIFIC.:.TIONS.

(a) Unless otherwiso': specifiod, 0.11 electrical equipment and materials, workmanship and tests shall conform with the current' standnrd rule's, regulntions and" specifica tions of the follmving authorities~

,(1) ,AmericanI,nstitute of Electrical Engineers, 33 w. 39th Street', 'New 'York, N. Y.

250 South

(2) American Society for Testing

Broad, Stroet, Philndelphio., P,,-.

Materials, National

(3) Nationnl,Board of Fire Underwriters, E18ctrical Codo, 85 John Streot, New York, N. Y.

(4) N!\tionnl Eleotric"l Safety Code.

(5) National E18ctricd Mnnufactu.rers Association, 155 East 44th ,Street, Now York, N. Y.

(6) Federal Spocificationscited harein,' (Superintendent, of Documents, U. S. Government Printing Office, Washington, D. Co)

13-2

(b) Copies of these rules., 'regulations and.' speoifications may be prooured at the addresses as given, or ma.y be seen at .th,? Corps of Engineers Office, Boston," Massachusetts .'

13-:01+. GENERAL DESCRIPrION.

(a) . Intake Structure'.

'(1) The power system inoludes conduit, wiN, control equipme.nt,· switchboard complete, generator cirouits, heater. circuits, motor circuits and the grounding ·system. . . . ' .

'(2) The lighting systom:includes 'the lighting fixtures, floodlights,'switches, receptacles, lumps, conduits, and wire fer the lighting system.

(b) Utility Building; The werk includes' a' .complet" interior WInng system in ,the Utility Building, 'is shown on the drawings•..

13-05. GROUNDING.

(a) 'Intake Structure. The switchboard, generator, gate operating stands, space heaters,.neutral wiring, all metal cabinets enclosing electrical equiPment and all metul conduits'and raceways shall be effectively grcunded. The switchbourd frame and power circuit neutral shall be grounded to the switchboard ground bus bar. ',All conduits entering the switchboard shall be bonded togother with No.6 stranded bure coprer cable,' using standard grounding buShings, and connected. to the switchboard ground bus bar. ·The auxiliary wiring guttur' und '0.11 c'onduits Gntering it shell be similnrly bonded und connected to the main ground cable, which cable shall pass through the gutter and thence up to the switchboard, where it shull be connected to tho ground bus bur •. 'Tup connections from tho main 'ground cc.ble shall be in~de· to equipment us indicuted on the drawings, by means. of soldcrless connectors ·at the equipment. The main ground cub Ie, where' run exposed, shull be supported with sui table' galvaniZo:l c lumps and galvanized expansion bolts and curried down and connected to the copper ground plute at Elev, 625.0, as i~dicated on the·.drawings •.

(b) Utility Building•. The'neutral conductor of the wiring system and service entrance equipment in the Utility Building shall be grounded to the wate.r service with uNo. 4 bureeable ut 0. point a8' near U3 practicable to tm water service entrance. Connection to water ·se·rvi.ce shall be made using upproved ground clamp. The 'ground wire shull be protected by 1/2" conduit.

13-3

(c) Gopper Grounding Plate. The plate: shD,ll conform to Fedoral SpeciJ'lcationQQ-C-576 for "Copper" Plates, Sawed Bars, Sheeting and Strips" with form and tempar required for the conditions of ins t"lll:d; i 'on'.

(d) Copper Grounding Cable. Cable for main ground connection to ground plate shall be strar4od, triplo braid, weQtherprcof covered, Qm;te"led copper conductors of the size shm'm on the dr~wings. Cable shall conform'to A.S.A. Specific~tions C8.18-1948 for ~eather Resistant (Weatherproof) Wire and Cable (V.RoC. Type)". Bare copper grounding conductors. shall be soft-concentric-lay copper stranding of the size shown on the. ,drawings and shall conform to A:S.T .M. de si gnt1.ti on :B8-52 standard specific ation for "Concentric-Lay-Stranded Copper Conductors, H~rd; 'Medium-Hard, or .soft It 0

(e) Brazed Connections. Brazed connections for copper to copper connections shall be made by using Class 3. silver solder ccnforming to Fec.eral Spec'ification QQ-S-561d for "Solder, Silver". Cormoctions made by the, "Cadweld" process may be substituted for brazed connections at the option of the ContrQctor and with the approval of the Centrac ting Officer., 13-06, WIRING 0 Branch-circuit ,conductors shall be not smaller than No~~ a.w.g. except that conductors 'for branch circuit whose length from pm181 to (lenter of loild exceeds 100 feet shall be not smaI1er than No. 10 !l.w.g.' Conductors shall be continuous from outlet to outlet, and no' splices shall be J1l(,de except wi thin outlet or junction boxes, Junction boxes mccy be utilized where required. Wire connec' tors with molded insulating mB,terial or solderless pressure connectors, properly taped, shall be utilized for all splices in wi~ing where possible" Soldered joints insulated with tQpe shall be kept to a minimum. Rubber and friction tape sheell conform to the requirelllBnts of Federal Speoifica tions HH7T-Illc and HH-T-IOla, respectively, Vinyl pleestic tape wi 11 be acceptable in lieu of rubber and friction tape, 13-070 INSULATED cURE AND CABLE.

(a) Interior wiring for the Utility Building shall be 600v rubber insulated, conforming to Federal Specification J-C-94 for "Cable, Power Electrical, Non metallic Shoathed, with ground conductor",

(b) Interior wiring for the Int~ke Structure including exterior feeders to lights and fuel pump motor at the service bridge shall be in accordance with the fol:owing:

13-4 i v·

(1) Gen6ro.l •.

0. •. All wire and c~bl8 shall be single canductor, insulated with moisture-and heo.t-resist~nt rubber or rubber-like insul~ting compound and with synthetic rubber j~ckets or sheo.ths·conforming to the requirements specified be 101"1,

b. The conductor size and circuit operating voltage fer "ny particulccr applicaticn or sorvice shall be 'IS indicated on the drawings, or as specified under the detailed requirements for the particular item •.

(2) Materials,. construction Gnd tests she.ll conform to the applicable requir6ments of the National Electrical.MGnufacturers Association Publication No. 49-141, February 1949, entitled, "Standards for Rubber-Insulated Power and Control Cables", P~rts, sections, appendices, grudes I.cnd classes specified hereinafter wi11 rafer to the above }m~t standard J unless otherwiso stated.

(3) Canductors shall be of unnealed copper wire conforming to the requirements. of Part II, Section3, and shall be tinned or lead ~lloy coated.

Conductors she-II be solid or str::cnded ~s· required below.

a. Power Oircuits.

1. Conductors. Conductors to be insulated for IOOO-voTt s8rvice and be low shall have Cleess B stnmding, ,mel conductors to be insulated for IDOl-volt servioe ~nd greater shall have Class C stranding.

2, ·Semi-Conducting Tape. A semi-oonduoting tape shall be·appliea·over all conductors insulated for 2000-101ts and grenter. The tape shnll continuously cover the conductor and shall· be .firmly· bonded to the insul~tion during vulcanization•

b. Lighting Circuits. Conductors of No. 10 AWG and smaller shall be solid, and conductors of No. ··3 AY,G and l~rger she,ll hava Class Bstr~nding.

c. Control Circuits.. Conductors Shllll have Class B orCTo.ss C stranding end shall. not be sffillller then #12 AWG.

(4) Insulation.

a, Material. Conductor insulation ccmpound shall be suitable for conductor temperature of not

13-5 11, ..

less than 75 0 C; and shall be moisture.resisting; and, for conductors specified to be insulated· for Rated Circuit Voltage of 600 volts und less, shull be either u vulcanized oil-liase rubber or rubber-like "Ozone-Resistant" grade of insuluti~n or a vulcanized rubber, rubber-like or synthetio rubber "Heat-Resisting" grade· of insulation.· The "Ozone Resistant" grude of insulating compourid shall oonform to Purt II, Section 4, "Ozone··Resistant, Grade 0", and in addition, shull have specific inductive cupucity charuo teristics us follows:

The compound, after a 24-heur immersion in distilled water ut room temperature (but not less than 21 0 C), shull show a specific.inductive capacity not greater than 4.5; uud, after a continuous 14-day immersion, shall show a speoific induotive capucity not more than 7 percent highor thun the vulue deter mined at the end of the initial·24-hour period, nor more than 3 percont higher than ut the end of the seventh· day.

The "Heat-Resisting" grude of insulating compound shull conform to Part II, Section 4, "Heut

·Reeisting, Grc.de H", und, in o.ddition, shall have specific inductive capo.Oity and mechunical wilter absorption·· characteristics as follows:

The compound, after a 24-hour immersicn in distilled water at room temporature (but not less than 2l oC.) shall. show· a spacific inductiv0 capacity not grec.ter than 5; and, o.fter 0: ·continuous ·1LI-du.y immersien, shall shew a spo·cific inductin cU-paci.'ty not more than 10 porcent high'Jr th,m the vuluo· de·t"rmiried ··ut the end of the initial 24-hour period, nor more th,m :3 por cent higher them at tho end of the seventh day. The compound, af:t;er a 7'·day immersion in distillod water at 70<·10C. shall not absorb more th'cn .015 gram: of water-per squaro inch ·of surface exposed to·the water.

The mcmufacturer, in the· presence of the Ccmtracting· Of·ficer, shall perform tests on srunples of thG insulation to.ken from the finished ·product to determino·compliance with the specified physical heat-resistant, ozone-resistant and meisture-resistun·t requirements 0 T·3st procedure shatl be in accordunce with the applicable r0quirements of ASTM Standard D470-54T. entitled "Methods of Testing Rubber ond Thermoplastic Insulated Wire and Cuble (Tentative)" on ..

the Standards of the Underwri t£:rs Labor"tories, Ino., for' Rubber-Covered Wirc and C~bles.

bo Insulation Thickness. Thickness of cQnductor insulati on fer the c·ircuits listed bo low shall not bs less than that shQwn in Table ·IV, of Part II, Section 4, for the respective Rated Circuit Voltages as specified below:

13-6

Circuit

Power Circuits, Lighting Circuits and Control

Circuits, eaoh operating at 600 volts or below

RD.tec~

Circuit Voltages (Volts)

0'-600

c. Shielding shall be made in accordance with the reco.~ended practice given in Part II, Section 5, including Table VI, except that siLgle-conductor cables insulated for Rated Circuit Voltage of 3000 and above shall be shielded.

(5) Jackets. Over the insulated conductor there shal'l be apphed an outer jacket of an oil-resisting thermosetting synthetic compound conforming to. Part II, Soction 7, Paragraph RUl8-35, Type 3; with physical prope rties conforming to Paragraph RUl8-83 of Part IV, Section 15. Except for shielded wires and cables, the jacket shall be in direct 'contact and adhere to the oon ductor insulation. If nonshielded, the jacket thickness shali be.as specified in Part II, Section 7, Paragraph RUI8-38, Table X. If shielded, the jacket thicklless shall be ,in accordance with the requirements of Table XII of the above reference.

(6) DL~ensional Tolerance. The outside Diameter of single-conductor wires and cables shall not vary more than 10 percent from the cQlculated outside di~~eter based on the thiclcness; including tolerance, of the component mat6rials specified. .

(7) Approval. M~nufacture of the wire an~ cable sh~ll not be started until ull materials to be used in the fabrication of th0 finished wire or ccble have been cpproved by the ContrQcting Officer.

(8) Inspection ~nd Tests.

u. General. Inspection and tests of wire and cable furnished under these specifications shull be m~de by and ct. the plant of the m~nqfucturer, end shall be witnessed by the Contracting Officer, 'unless waived in writing. All tests and 'inspections .shull ~onform to the prooedures set forth in the applicuble specifications or stcndards refsrred to 'herein, specifiec.

b. Reports. Four certified copies of tostreports, indicating ohe results of tests made, shall be rur~ished the Contracting Officer, arid no. wire or cable shall bc shipped until ~uthoriEed by the Contracting Officer.

13-'(

13.08. ,/IRING METTIODS. - a.. - Conduit Sysmms. - •

(1) Conduit systems shall be installed in accordance with the applicable provisions of the National Electric Code. Rigid steel conduit shall be zinc-coated and shall conform to the require~

'ments of· Federal Specification \WV-C-581. Conduit fittings .shall conform to the requirements of Federal Specificution w-F-406. Conduit shall be of 1/2-inch

.. min:~.nlum si.ze except as· otherwise indicated. .

(2 ) Conduits shall be. con-cealed within the walls; ceilings," and floors where p~ssible, and shall be kept at least 6 inqhes from parallel runs of flues, ste~~ pipes, or hot water pipes unless otherwise shown on the drllwings·.· Exposed runs of conduit shall have supports spllced not more than 8.feet apllrt Ilnd shllll be installed with runs. parallel or· per pendioular to walls, structural members, or intersections of vertical planes and oeilings , with right-angietu,rns co"nsisting of cast-metal fittings. or symlll8trical bends •.

Bends and offsets shall be o.voidod where· possible, but:

wl,ere nocessary shall be imde with an approved hickey or conduit-bending machine. Conduit which· has. been crushed or deformed in any wiy shall· not be installed. Wooden.

plugs inserted in masonry or conc~ete shllll not be used as a base to secure conduit supports. Conduit sh~ll be supported on approved types of'"g·alvanized wall brackets,.

ceiling trapeze, straphangers, or pipe .straps,.secured by moans of toggle bolts on hollow masonry units, expan sion bolts in concrete or brick, machine screws on·metal surfaces, and wood screws on wood construction. Threaded studs driven in. with a power charge are permitted for fn.stoning raceways on solid masonry, steel j concret~, and wood~ Throadod studs we Ided to stoe 1 are ·acceptable.

Nails shall not be used IlS the meane of fastening box'os or conduits. C0nduit shRll be inste-lled in such manner IlS to insure against trouble from the collection of trapped condensation, and all runs of conduit shall be arranged so ,",s to be devoid of tro.ps wherever possible.

The Contrllctor shull exercise the nocessary precautions to prevent the lodgement of dirt, plas'ter, or tras!1. in conduit, tubing, fittings; and boxes during -the course of installation. A run of conduit which has become clogged shallb~ entirely freed of these Ilccumulution3 or shall be replaced. Conduit ahall be sec~ely fastened to all sheet-metal outlet, junction, Ilnd pull boxes with galvanized locknuts und bushings, care being observed to see thrtt the full numb"r of three-ds project through to permit the bushbg to be drown tig.l-tt D.gninst the end· of conduit, after w~ich the locknut.~hall be made up

. SUfficiently tight to draw the bushing into firm electriolll contact with the box. Double locknut construction shD.ll be

13-8.

used No. 14 soft dra,m galvanized iron pull wire shall'be installed in all telephone conduits.

_-,- .,b. Cable Systems. - Nonmeitallic-sheathed cable shall Conform to Federal SpecificatiOOJ -c-=94'and shall be _equipped with ground 6onductcr.

Cables shall be installed concealed behind ceiling or wall finish where prac ticable and as directed by the Contracting Officer. Cables shall be threaded through holes bored on the approximate centerline of wood members; notching of end surfaces will not be permitted. Sleeves shall be-provided throu3h bond beams of masonry-block walls for threading cables. Exposed cables shall be installed_parallel or at right angles to walls or structural members. In rooms or areas not provided with ceiling or wall finish, cables and outlets shall be installed so that a room finish may be applied in the future with-out disturbing the cables or resetting the boxes. Exposed nonmetallic sheathed: cables less than 4 feet above floor shall be protected from mechanical injury by installation in conduit or 'tUbing.

13-09. OUTLETS. (a) General. Outlets shall be installed-in Ule loca tions sho,ID on the-axawings. The contractor shall study the general building plans in relation to the spaces surrounding-each outlet in order that his work will avoid interference with the other work reqUired by these specifications.

When necessary, the contractor shall relocate outlets so that, when fixtures or other fittings are installed, they will -be symmetrically located according to room layout and will not ~nterfere with other_work or equipment.

(b) Outlets in utility Building. Only-zinc-coated or cadmitun plated- sheet-steel boxes conforming to requirements of Federal Specification W-0-821a, _of a class- to satisfy the conditions for each outlet shall be used in concealed work. Boxes-shall be installed in a rigid and-satisfactory man ner, either by-wood' screws on wood, expansion shields on masonry., or machine screws on steel work. Threaded studs driven in with a powder charge are per mi tted for fastening boxes on solid masonry, steel, concrete and wood; threadec studs welded to- steel are acceptable. l'ixture outlet boxes in concealed work on ceiling shall be not less than 4-inch octagonal. Fixture outlet bm:es in concrete ceilings shall be of the 4-inch octagonal concrete type, set flush With the finished surface. Fixture-outlet,boxes tin dry wall type ceiling con struction shall be fitted with open covers set- to come flush with the finished surface. SWitch, -telephone and receptacle outlet boxes shall be not less than 4 inches square for conduit or tubing,- fitting with appropriate plaster covers, where necessary, to set flush ,fith the-finished surface. One-piece gang boxes not less than 2 inches deep shall be utilized. where necessary. Outlets for exposed work shall be of cast steel or alloy, fitted with appropriate covers .

Cast-metal fittings shall conform to the requirements of Par; 13-09(c) below.

Outlets and junction boxes less than -6" x 6" x 4" in exposed worl, Shall be cast steel or alloy, fitted with-appropriate-covers.

(c r Outlets in Intake -Structure. Outlets -in the Intal:e Structure shall be of cast steel or alloy, fitted with- appropriate_covers and gaskets.

Gast-metal-fittings shall conform to the requirements of Federal Specifica tion ~1-C-586.

(d) Pull Bo;:es. Pllll boxes 6" x 6"x 4" and larger unless other wise specified, shall be constructed'of code"gage galvanized sheet metal, of not less than the minimum size recpIDffiended-by the National:Electrical Code.

Boxes shall-be furnished ,dth screw fastened covers. ~lliere several'feeders

13-9 pass through e. co=cnpul.l box~ theY. shall betagsed to .

indicate clearly theircJectrical charac ~eristic9,'cireuit· " number, a!ld panel design?,tion.

(e)' Clock Outlets • . Eilch clock outlet, .for 'use in otha'r then e clock system', sh,"ll 'c'lnsist :of un" , .,' outlet boxiPl::ister. C'lV8r where required, [end single

'. receptllcle With clock.,outlet plate. The .rece,ptacle shall, 'be sufficiently recessed within the box .100 Illlow the. complete inserti'ln: of. a. stllndllrd CIlP, flush. wi th the p1<:lte •. A-.

.suitable clip nr.support for hanging the olock shall be secured, to' the' top of the plate.

(f) sho,:I,l'be 'provided plates shall have

Telephone Outlets.

with JIB-inch .hole

0. bushed hole.

Each telephone. outlet in tho center.. Metal·

(g) Device· Plr,tes for UtilityBuilding •.. A . device plo.te shall be provided' for each outlet to suit . the de,vicE;> installad.: .·All plc.te s on unfinished wo.lls or on ',.-fittings shall be· of zinc-coated sheet mato.l having rounded or bove led edges. .All plates on finished, walls shall be .040 inch thick brllss, brush finish. Sorews sho.ll be of metal with countersunk heads, with finish to match the finish of the plate. P10-tes shall be installed with all four edges in continuous contact with finished wall surfaces ,vithout the use of mo.ts or similar devices. Plo.ster fillings wiil not be permitted. Plo.tes shall be installed vertically .

und with' an. lllinement tolerance of i/16 inch. Device plates.

shall be of the one-piece type, of suitable. shape f'lr the ' devices to be·'covered. The use of sectional devioe plates will not be pe rmitt8d.

(h) Device Plates. for ~ntake Structure. Cover plates for .vall switch boxes 'f"lr Intake Structure Shall be of the'vaportight and weatherproof type, Crouse-Hinds Catalog No. DSl810r approved equal. Caver plates f'lr duplex oonvenience receptaoles shall be Crouse-Hinds Catalog No. DS70g box cover or approved equal.

13-10. WALL RECEPTACLES. Wall NceptL'cles shall be of the duplex type conforming to the requirements of Federal Specificati'ln W·'R-151 except the,t they shall be pro vided with a third grounded pole. Receptacles shall be capable of receiving two-wire parallel-bladed caps or three pole caps. Tho third gro~"lded pnle shall be cconnected to metal mounting yeke. They shall be rated 15-mnperos, 125 volts. A total 'lf six 3~,ire caps, armored with cord grip, to fit the receptacles, sh"ll be furnished.

13-11. WALL SWITCHES. W&ll switches shall be of the totally enclosed tumbler type conforming to Federal

. SpecificLltion , WS-896. Bodies shall be phenolic

13-1C.

compound. Wiring terminals shall be of the screw type or of the solderless press1rre type having suitable conductor re lease arrangement. No more than one switch shall be installed in a single-gang position. Switches shall,be rated IS-ampere, 120_volt for use on alternating current only and shall be suitable for the control of incandescent lamp loads, and inductive loads up to their full rated capacity. Pilot lights indicated' on the drawings shall, consist of a yoke mounted candelabra-base' socket rated at 75 '1;ratts, 125, volts, and fitted with a red glass or plastic jewel. A clear 6-watt lamp shall be furnished and installed in each pilot ffi;ritch.

13-12. PANELBOARDS. Panelboards shall be of the dead front safety type provided with the size and number of single-, double- or triple-pole branch drcu it breakers as indicated on the'drawings. Mains shall be arranged for a grounded, solid-neutral system with lugs only in mains unless othe~Nise indicated on the drawings. Panelboards shall conform to Federal Specification W-P-131, with Class A or Class C circuit breakers.

13-13. CABINETS. Cabinet' box for UtiUty Building shall be constructed of zinc-coated sheet steel and shall conform to the requirements of Underwriters' Laboratories, Inc., Standard, for Cabinets and Boxes. Trims and door ,shall have a suitable primer coat and finish coat of grey color.

Cabinet for panelboard shall be provided with not less than 4-inch wiring gutters at the sides, top and bottom. Cabinet shall be mounted so that tho distance from the floor to the center of the top ffi"itch er circuit breaker will not exceed 6 foot,6 inches. Trims shall be fitted with hinged doors having a combination lock and latch. A directory holder with clear plastic or glass plate and metal frame shall be mounted on the inside of tho door. A neatly typed directory, properly identifying each circuit, shall be mountod in the frame.

'>I

13-14. LIGHTING FIXTURES.

(a) General. The install all lighting fixtures.

Shall be of the types indicated as follows:

Contractor shall furnish and Fixtures and appurtenances on the drawings and specified

(b) Interior Fixtures. Interior fixtures shall conform to the follovnng speci11cations and Shall be as detailed on Drawing No. 40-06-04, Sheets Nos. 3, 8, 11, 25, 26, 30 and 47, which accompany and form 'a part of this spec ification. Illustrations sho,m on these sheets are' indicative of the general type desired and are not intended to restrict selection to fixtures of any particular manufacturer.

Fixtures of similar designs and equivalent light distribution

13-11

.c.nd 'bl-ightness chdr"cteristics,' and htlving equal finish v,nd quality will be 'uc'ceptable if approved by the Cont'r'acting Officer.,' Suspended incandeso~nt fixtures shall be'provided with swivel hangers in order" to insure D. plumb installaticin.'

(1) Incandescent industrial type fix tures'shall, conform to Feder~l Specification W-F-412.

(2) Fluorescent lon,p auxiliaries shall cor~onn to Federal Specificution W-B-30 and shall provide rapid, start and otherNise be suitable for oper~tion' of the specified lamps.

(c) Floodlights mounted o~ roof of Intake Structure' shall be Crouse-Hinds CC~Pl'llY'S Type ADE-16 or approved equalwi~h 2-inch slip-fitter base, narrow beam reflector and SM lens, 24.5' horizont~l end 21.6" vertical beam spread and PS'-52, 1000 wc.tt l~rnp.

(d) Exterior Entr~nce Lights on Intccke Structure.

The ~vo exterior fixtures at entr~nce doorway in Intake Structure shull be similar und e'iuul to the Cuto.log' Nci. 5111 of Gruber Lighting, 125Scuth First Stroet, Brooklyn, N. Y.

The fixtures ~nd back-plates shall be of cast bronze, with bronze finish, furnished with Alba glc.ss, and hinged bottom for relaffiping. Provision for concealed wire cntrance shc.ll be through the lower mOlli'"1ting bracket. Two 200-watt l=ps shall Oe provided in eQch fixture.

13-15. SERVICE EQUIP~ffi~IT. MQin service disconnecting means in tho UtilIty Building, for the powar circuit to the Intake Structure, shall be of the 'circuit b~eaker type, equipped with ari. external lever or hnndle for manual opera tion. Tho unit shQll be enclosed in a code gage, sheet stee1, NEMA Typo ]j" cabinet suitable for 3urface mount.ing as indicated on the drawings. Surface mounted enclosure' shall have hinged door and cutuh. The ci,cuit breaker shall comply with the applicable requirements of Federal Specifi cation W-P-131a, Class A or Cluss C.

13-16.; ELECTRIC BEATERS. Electric heuturs for heating the operating floor of ~he Intike Structure shall bo of the surface-mounted, convoctor-t~" coneisting of holically coiled nickel..·chromium rDsistn.ncG wire omboadod in an electrical-insulating ~QTIder with, a metul sheath. Heating st,.ips shull be mounted, within a venti lated metal housing th[\t will p3rmit a nnturul flow of air around the hee,ter strips. Heaters shnll be securely fllstened, to the vmlls and shall he autom8.tically controlled by u thermostat. Heaters shall be rated 208-volts, single-phase, 4.5-KW D,nd shall be Edwin L. Wiegand Company, Typo Y, or approved "'1ual. In addition to thermostatic control"tho coil circuit of tho magnetic oontactor in the switchboard shall be electrically

13-12

,w interlocked with the contactors controlling the two g~te ·operators so tho.t the, heaters will b'e automatically de~ en'ergized when the gute control'contactors are energized.

13-17. THERMOSTATS FOR INTf,KE STRUCTURE.

(a) FOT Contrcl of Room Heaters. Thermostut for control of room heaters shall be Catalog No. lVR-80 or

'approved equal of Edwin L. Wiegand Company" rated' 115 volts A.C, with ro.nge of 40' to 80° F and differential of 3' F. '

(b) For Control of Air Intake Hood Dumper.

Thermost~t for control of air intake hood d[@per shall be of the type that closos the ;circuit at high temper~ture to open the louvers. It shall be Typo TA42F of Minneapolis Hono~v811 Rogulator CempQny or o.pproved equal, rated 115 volts ;"C., with range of 66° to 95° F. and differential of approximately 1° F, 13-18. 'SWITCHBOARD IN INT'Jl:E STRUCTURE.

(a) 'General. The switchboard shall be a control center, l'lEMA type "c" switchboard and shall comply wi th the ,"pplicabl" sections of, the NEMA stan.dClrds ICl-1954 and be u pro~uct of a reputClblo mfmufacturor regul~rly eng"god in tho production of ';his type of equipment. Tho individual compartments for air circuit breClkers, combination magnetic starters, lighting plcne J,be'.crd, instruments and meters shall bo of ,the size required. ,Tho complete s·Nitch board consisting of the ,units indicated on the draWings or listed in subparr:gro.ph (c) bolow, sho.ll be, ass()mbled, wired, and complotely reo.dy foi making all exte.rno.l connections ut tha master tcrmin~l blocks o.t the bottom of tho switchboard.

Provisions shQII be mt,de so th·~t ouch combination sto.rt6r or assonillly'm~y'bo readily removed for repuir or replo.cement.

fell elomonts shull be complotely o.coessible from the front ef the switchboard,

(b) Construction. The switchbo',rd shall con sist of driptight centrol center units in verticr:l sections mounted on Q structuro.l stesl frame according to the manu fucturer's standard constr~cti9n for such units; Each sec tion shc,ll be fabrico.ted from' smooth select sheets not less thun 3/32, inch thick" sh'"ped and reinforced to form a rigid, free-standing structure. Tho units shall be assembled in accordance with the arrangement shown on the draWings. The switchbourd sh~ll be installed oq'~ structural steel fro.me which ~hil.ll·'be mounted on "'nd l1nchored to the concrete floor, A, flr:r~e-formed door mounted ~n fully concealed hinges and fastened by approved type door fo.stoners shall be provided on the front of eo.ch compartment, making readily accessible all air circuit breckers, cambinQtion ~tarters, battery

13-13

5 -charger, lighting circuit panelboard and indicating'instru ments and appurtenances. The external operating handles for all air. circuit breakers shall clearly. indicate the condition of .the circuit "On", "Off", or "Tripped" and shall be interlocked with the door to require throwing the handle to the "Off" position before the door can be opened.

Removable covers shall be provided.on·th~· rear of all verti oal sections. Removable cover plates on each vertical sec tion shall be provided for access to bus and to terminal block compartments•. the exposed. surface of any flange formed door or pa~el shell not deviate more. than 1/16 inch

.from a true plane. Provisions shall be m"de for 'entrance of all wires and cables from the bottom of the switchboard except as indicated on the drawings •

. (c) Equipment. .The switchboard shall be fur_ nished with the equIPment as indicated on tho drawings and as listed below, including busses, connections, wiring· and all aocessories required to make the board complete and ready for opecation. All equipment shall be operated from the front of each compartment unit without opening the door wherever prac tical. Air circuit, breakers, panelboards, magnetic contac tors and indicating instruments shall be as hereinafter speoified and all other equipment shall conform to tho appl~cable sections of the NE1ffi Industrial Control Standards.

Switchboard Equipment

Air circuit breakers ,240-volts., 3-pole, of ampere ratings indicated on the drawings .. ,The. 'cir,cuit breakers' fcr the incoming lin" and generator

. shall be mechanically interlccked.

-4

1 - Air ciroui t breaker, 240-volts,' 3-pole, of ampere rating indicated on' the drawings in combination with aNEMA size two, 600-volt, 3-pole magnetic contactor with 110-volt op0rating coil.

3 - Current transformers

1 - Frequency meter, 57-63-cycles

1 - Wattmeter, polyphase

1 - Voltmeter A.C., 0-300 scale

"1 - Voltmeter switch, selector type for obtaining line or gene rator phase voltages.

1 - Ammeter A.C.

1 - Ammetor switch, 3 lines and off positions.

13-14

1 - "Power On" indicating red light with (uses, con nected to one phase and neutral of Incoming Line circuit.

1 - Running time. meter for generator.

1 - Generator voltage regulator complete with . acc0ssories.

1 - Auto~atic - Manual switch for changing from automatic voltage regulator control to manual control by means of exciter shunt field rheostat.

1 - Rhecstat for control of exciter shunt field, complete with operating shaft and suitable hand whoel (Furnished with Engine-Generator Sot)

1 - Battory .charger for starting battery of engine generator. (Furnished with Engine Generator Set)

1 - Panelboard, l20/208-volts, 3-phase, 4-wire, circuit breaker type.

2··- Spaco heaters 100 ·watt, l20',volt.

1 - Lot of fuses end fune blocks as required.

(d) Name Plates. The switchboard shall be equipped with lominated n"me plates of block !llld white "Bakelite" or equal, to dcsiVlate e"ch unit,. instrument switch and each e.quipment item. Terminals of mastar terminal board shall be provided. with ·terminal identifica tions for all incoming circuits as shaNn on the drawinga.

The background shall be black and the letters or numbers shall be white. Name plates shall have bevelled edges.

Designations for .instrument switches shall be engraved on the switch plates or shall be. on nrune plo.tes mounted on the· unit•. All other mooe plutes shall be. mounted on the unit.

Screws or pins of approved typo shall be used to fasten mune plates •. For the circuit breakers and. combination starters thG name plate designation .shall include the equip ment served. A cemplete list of all switchbo~rd n~~e plates shull be submitted. for ~pproval, showing complete information in~luding size of each n&1llC plr.te 'md date rend arrangement of engraving fer each nama plato.

(c) Buss~s and Conneptions.

(1) Busses from. the .loud side of the in~oming service circuit break0r- and the ntandby generator circuit breaker shall be connected to the main busses' so that energy can be: obtained from either source of power.

Connections shall be ~~de frem the main buss8s to the equipment as indicated or required. Bus bars shall be

13-15 rectangular bar, made cf hard drawn cold rolled, electro lytic copper. The cross sectional area shall provide a value of current density consistent with the allowable temperature rise. The hot spot ·temperature rise of busses and connections .shall not exceed 30 degrees C. above an ambient air temperature of 40 degrees C. Busses and con nections shall have cleo.rance between phases, and phuses and ground, as determined by standard practice. Busse" shall be adequately supported and suitably bro.ced to with sto.nd 25,000 RlAS amperes short-circuit current.' All joints shall be firmly secured by means cf bolts and clamps, and all nuts shall be accessible for ti::;htening, All holes in bus bars sho.ll be drilled and all bolts shall be corrosion resisting and equipped with lock washers,

(2) A switchboard ground bus shall be provided near the bottom of the switchboard to which all equipment requiring grounding shall be· cOllilected. The bus shall be 114" x 2" copper bar. The frmne of the switch board shall be connected to the bus in an approved manner.

(f) Wiring. The switchboard shall be wired complete and ready for operation. Each branch circuit feeder and remote control circuit 'shall he terminated at the master terminal board and all terminals on this board shall be neatly and legibly marked in accordance with the specific identification marks shown on the wiring diagram to be furnished by the Contractor. All switchboard wiring shall ~8 in accordance with the best standard practice, rigidly· held in ~lo.ce by approved means and carried in straight horizontal and vertical runs with neat right angle bends.

Switchboard control circuit· wiring shall conform to the requirements of ASA Publication C8.36··1955 entitled "Americm Stundard Requirements for Asbestos, Asbestos Varnished Crunbric ".nd Asbestos Thermoplastic Insulated Wires and Cables". All wire, except that useel for hinge wiring, shall be lJE1{Ii··IPCEA DesigHltion No" 6, Type AVE, or designation No.8, Type TA. Hinge .wire shall bc designQtio~

.No. 7, Type AVB, cr designation No.9. Type ·TA, with Class "K" stranding. All Wiring shall ce mude between points of terminution without splices. All termiao.l studs shall have contact nuts or ·lo0king nuts, or contelct nuts with phosphor .bronze sho.kepr8of welshers. All metal cleats.

mounting straps, braokets and wire supports shall be of heavy gage rust-resistL1g metal, All screws and bolts which [lre used for the support of wire shall be provided with lock washers or shQkeproof washers, and shall be rust-resisting with cadmium-zinc finish. Insulating bushing and insulating collars shall be furnished where require,'-. All wiring through holes in steel plates shall be protected by grom_ mets. Fuses and fuse holders shD.ll be provided for all potential circuits and elsewhere as shown on the drawings.

13-16

(g) Terminals, Supports and Fittings. Solder less type terminals shall be provided for cable ccnnections.

Bus supports shall be porcelain, ebony, asbestos or other noncarbonizing material of high dielectric strength. Clamps, bolts., nuts, 10cknuts'8_nd washers used on busses and con nections shall be nonmagnetic, similar and equ~l to Everdur.

This reference is for descriptive purposes only. All mount ing bolts shall be of corrosion-resisting material.

(h) Terminal Blocks substantially male cf hot molded_comp~undwitn ~nt~grd~.outie and barriers and insulated for 600-volts 'shall be fU:rriished for ccntrcl wiring,instru ment transformers, and elsewhere as required. They shull be provided with covers.

(i) Finish. All panels shell be bonderized beforE> tlny primer, pc,int or laoquer is c.pplied. Not less than one primer coat, one filler coat, and three finish

. coats of qUick -,,_ir-drying lc.cquer shc.ll be applied to all outside surfaces. The lacquer shall be ASA Stc.ndard Indoor Light Gray No. 61 iil color. Interior and unexposed motal parts sholl be finished according to the manufacturer t s standard over two primer coats. A suffioient quantity of paint and lacquer shall be furnished- by the Contraotor to restore ~ny damaged places in the finish after the equipment is in place. All finished. painted surf"ces and mehll vlork shull be ~Tapped suit~bly or oth3rwise protected from d~~age during shipment.

(j) i&d;, RUbb"':: •. A rubber insuiating-~at shall-be furnished andplac8c on the 'floor at the front of the switchboard, and shall ext8nd the full length of the switchboard. Thq width of the rubber mut shull be 36 inches.

The ruat shull conforrr, to Foderal Specificr-tion ZZ-M-81a for "Mr.tting;. Rubber (for use Arou;d Electrical Apparatus or Circuits not· Exceeding 3000 Volts to Ground)".

(k) Dc:ta to -be Submittad for Approval. Complete det"i 1 draWings indicating construction of the switchboard, front, plan, 2.nd sectional views, layout" of equipment ..

schematic and construction ~iring diagrams, name plate data and a list of a~l equipment indicating the mumrfllcturer, rllting and type of allch item, shllll be furnished the .

Contracting Officer for Ilpproval before commencing switch board manufacture;. - The Contractor m!ly, wi til the approval of the Contracting Officer, modify the indicated design if it is f~und advisabie to do so in order to more relldily oonform to_ the splece t\v;.lilable _and to bet-tel' utiliZG the equipment he proposes to use. The above dc.ta shall be submitted.in

- Ilocordance with the requirements of Spe-ci<ll Conditions, of the specificutio~s. ~ , 13-27

, (1) Wiring Diagrams. The Contractor shall fu'rnish the Contracting Officer with five 3-line, schematic wiring eiagr~~s and five sets of shop drawings'of switch board. A full size print of'the schematiC,wiring diagram shall be fr'imed in glass, and mounted on the wall nenr the

:iWit6hboard, as directed by the Contracting Officer.

(m) Factcry Assombly and Inspection. The s~itchboard shull be erected, wired completely, tested and

,:inspectei at tho factory. The Ccntracting Officer shall be ,given 'due notice ,vhen the switchboard is ready for inspection.

,(n) Factory Tests. Tho switchboard' shall be given the standard dielectric test for 600-volt equipment and in addition tests for successful pperation, of the equip ment ~nd cont~ol' cirouits. The switchboard sh~ll be tested to' demonstrate its ability to withstund a :short-circuit of 25,000 RMS amperes. In lieu of this test, the manufacturer muy submit ,a oertified' copy of test results of, a switchboard o'f the' SOllle type and rating" Thoso tests shull be :mnd" at th~ switchboard manufacturer's plant. The Cnntractor· shull

.malw anychQnges necessary to comply with the wiring diagram ,'and' provide the performance outlined on the 'contrv,ct' drawings Vii thout 'cny cost to the Governrilent. ,',

(0) Air:, Circuit Breakors • Circuit breakers for208-vo1t 'circllits shall hc,va. j-poleth,;rm,:l ,,,,rid. magnetio trips and shall cnnform 'wi th the:'icpplicable r:equirements of NE1~, Standard ABI-1955 for molded-case type circuii 'breakers, manually opcrated, with automatic trips.

(p) Panelbo!crd 120/208 volts., Pnnelboard "shall confcrm with the applicable' requirEmerits of Po.ragraphs 13-12 and 13-13, except that n separate cabinet und door lock will 'not be required. Access to tho operc.ting he,ndles of the circuit bronkers shall 'be obtc.ined by 'opening the hilJged panel of the switchboard.

'(q). IndicQting Instruments. Indicating instru ments for switchboard mounting shc.ll be standard manufactured products of the ciI:'cuhr scale, 'flush or semi'-flush typo, a.p proxim'ltely 4-1/2 inch' ;'ectangulc.r 'class, ·with.'l 'dull black finish to'suit the switchboard and a, scnle length of approxi_ mately 7 ,inches•. The m')ving element she.ll have high torque, be light in'woi&ht, of sturdY'construction, supported on jewel boarings, and'shnll withstand heavy., ~nstQntancous overloads.

They shall be,well-do.mped, responsive to sma~l or'rapid elcc trico.l chO-nges, and shielded from external m"gnetic fields.

Scales shall be direct reading" and of the r2:ngEl reqUired or indicated, or a maximum length, designerlto'permit correct ~nd ready reading within an angle of 45 degrees from the normal, and sho.ll carry th'3 instrum8nt dc-ta, all as D,pproved by the Contracting Officer. The pointer shall match the scale and

13-18 h~ve zero 'ldjustment by means of a screw on the front of the,:case. ' Casos shall be of the SCl'lle size, dust-tight, provided with n dial opening of a size giving full visi bility of the soale. All instruments shall hGve an accu racy within Cone percent.

(I') Instrument Switches. Instrument switches sh~ll be of standard manufacture, of heavy con struction and shall provida the necessary contacts as required for the p~rticular application, They shall be of the rotarytyp0, similar and equc"l to T:'Pe W nf the Wostin~~ouse Eleotric Corp., or Type SB-l of the General Electrio Company. This rafE;rence' is fordo'scriptive pur-

_ poses only. The contaot arrnngemEmt of the switehes shall be 'such that eelch A. C. instrument can be connected to =y one of the three phases ,end to also pr'wide an "OF'F" pnsition.

(s) TJ1£ vnltQge regulGtor shell be dosigned for o.ut0matic voltage onntrol of the generatnr and "rranged for noerution in the excitor shunt-field circuit. It shall provide good regulation up to 150 peroent of rated generntor capacity and shall be similar and approved equal to T,~e

SR.;,-l, mr.nufllctured by Westinghnuse Eleotric Cnrporc.tion.

(t) A battery charger of the selenium or copp"r oxide, type, shall be inst&lled inside, the switchboc.rd.

The output side shall be connected to the battery ch£.rging· , system and the input side shall be' o"-pable of operating' at 120 volts, 60 cycles, A.C., ~nd shall have sufficient capacity to charge the" b£ctt'''ry r.t a charging r",te of 6 amperes.

Chllrger shall be pr'TJ'ided. with seps.r'cte adjustment, in the primary circuit for tricklo ch~rging ",nd' fnr varying the charging rate frnm. trickla to mc~imum in at least 6 steps.

The adjustment shall be operated fr=, the front of the gwitchb0ard by ~pGning the hinged panel. Trickle charge shccll have a variable ,adjustJrent to vary ro.te of charge within limits requirei by the battery m[illufacturer. Charger sho,l1 be provided vlith fuses on both the A.C. "nd D.C. sides ",nd shall be equipped,with D.C. voltmeter ,and aumeter and adjusting'h~ndle m0unted in the front panel of the charger.

Adequr.te means sh"ll be prnvided for ventilation. Automatic' ON-OFF charging shall be provided. The charger shall 'be autnmaticc.lly disc~nnected from the battery when thechnrging generator on the engiri~: ~s in f)p~T.a;tion.·

13·-19. EQUIPME},'T CONNECTIONS, C~nnqctions fnr equip ment'subject ,to vibration ,shall be ,made with,flexible c~nduit, Cnntrollers for mot"rs, disconnect ,switches; [md all cnntrol, pro'tecti~e"und sfgnal: devices· f0r mo.tnr circuits JI • except wher·) such apparatus' is furnished mounted :md conne,cted inte-

'g1'al with the motor-driven equipment" sioc.ll be inst[llled,' connected, ~nd'left in opero.ting' o,ndition. Where the number and size of c"nductor~ betwee'n motors. £.nd c:mtrol 0r.. pr0tective

13-19 apparntus are not specified they shall be as, recommended by the manufacturer of the apparatus, or as required by the National ElectricQl Code.

13-20. MOTORS. Motors furnished under this and other sections nf these specifications sh.::.ll be cf sufficient size for the duty to be perfnrmed and shall not, excee'd their full rated load when the driven equipment is operating atspe'ci fied capacity under the mast severe conditions likely to'be encountered.