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<br />300-18
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<br />,'" ~J!l<iL " controls for regula1:'~nCJ the current ~utput-. All such equipment
<br />";, '.':' :~~;i}~}j~?~t<,~,"::~iN:~~~i,Shea. ~y 'the CONTRACTOR, subject to the approval ot
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<br />. f 'I~t .~., ;\~~~(f'~' I' , " I' f . '
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<br />, ":-"t~, , cables from ,'the power 'source to the '.ection of system under t.est
<br />l<,;:/~I,P.,':(;shou'ld ))e of sufficient size ~o carrt. 'the test -purrent without
<br />"''''.,j,,~'overheat1n9 or ~e..ive'.v<>l,t..ge drop. - Usable sizes will
<br />. ' ,p;oobably be'in the range of 2/0 to 4XOA.W~G.
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<br />Conneotions for the test shall De mac;1e at hydrants. The,
<br />_hydrants shall be in the open pos1tion with the caps on during
<br />the test. The, cable shall be clamped to 'the top operating nut.
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<br />NOTE: AFTE~ THE, TEST, ''!'HE_ HYDRANT S!JALL BE SHUT OFF AND A CAP
<br />LOOSENED TO ALLOW HYDtwrr DRAINAGE.' -:, TIGHTEN CA1> AFTER DRAINAGE.
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<br />A-hook-on type D.C. ammeter p1Jlced 011 one_of tbe.cablesle~ding
<br />to the- hydra~t is a conven1ent metho~ of measuring current.
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<br />In using aJ"c welding machines, the c\1rrent oon_trol should-,~.a set
<br />at minimum before starting. After s~arting the maohine,. advance
<br />the control until the current' indica_ed on the ammeter is at th.
<br />desired test value. --~ '
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<br />CAUTION: In case of open oircuits a-b joints or corinect'ions, the
<br />voltage across the deteQti~e joint or connection will '
<br />})e ~n the order, ,of 80-100 volts.
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<br />304.3, ;, p~~~nfeQtion
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<br />"All water distribut.ion"'.ystem or ex:tQnsion to 'existing .yat'em,' rl
<br />, I',' ,,' ~( 'or ,any valved, .$ction,1',:q;t'II~ch'-extens_1~on, ,or replacemtltnt~' shall be i,,"
<br />:".i: (, 'c1i,s1nfect...d', prior ,'tQ- p~~I1~inc.r'.,~B.me in, tserv:~_c~~' Suoh ~hl_orinatlo~ " .
<br />, shall_ consist of . .dOS~,' Q8,.t,O:C:,: chlorin~ eq:u,ivalent tp'so parts per (I
<br />.11'1ion of chlorine. ' '1'piS'1Iay beacctompl:lshetl !;?yusinq a ' , 't'
<br />" oommercial type.. chlorin$tot" fo~ feediLhq a_:ch~Qrine ,olution' Ol=' I -
<br />" -, b-y placing dry Caloium Bypoohlorine E!Pch as:- "~..;, -"PERCHLORON",
<br />or "HAXOCHLOR" 'at 'the rate of one poqpd( ltl, of' ~ateri~l_' con- .
<br />taininq 70' available cblorine,per e~~h 1680 -9allons-of-water
<br />in the line. ' -' ,. '
<br />A,predetermined dO". .hall:~e ~haken ~~nto ,~e,.uction -wal~"th~
<br />standpipe or .levat-ed tank, - or into '*e,p:1pe'at the O-first ,joint
<br />attached to the existing- waterpipe-, - ~fSnd ,.the 40'.9'8 shall be
<br />repeated ,at fteque~t predeteraintd - in:~et'Vals; prefera))ly_ -at eaQb
<br />, , pipe joint as the pipe laying, pt:'ogreEfJles, or-as may be ~irect:ed,.
<br />· . I 'bY the ENGINEER.' . .
<br />, ',' If,,~IHI'1 - \:i' When' treated ,with. dry (calci\UQ: hypoch-l~brite or with dry chlorin'"
<br />.', ated liiii;-the n8w~y 'laidc,'pipe aha'll ~e filled very ,slowly to
<br />avoid washing the powder to the extre1nity. of ,the pipe line. .
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