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AUGU9T28, 1978 <br />�✓ <br />� <br />� K�1 <br />l `% 2 Z iv � ?�?�t� �-r-uJ .��` ' <br />DEAIYFRONT SW�TCHBOAROS — UL 89I <br />TABLE ��.1 <br />612EOFBONDIN�.COND CTORSANDOR'OUNDBUSNDINOELECTROOE <br />Slx� ot OraundlnY �t� d�n Bondn7 <br />M�Mlmum 9=� � E4uIP'"�^t Oroundina Jump�r. Mlnimum <br />AmpM a�ndlnp Cunductw Mlnlmum ENctrod� Candua�or (AWU «MCM) <br />�AWQ a�M� Mlnlmum IAW4 a�MI —� <br />Ratiny .�---�� <br />qluminum CapPR Alumin�m <br />�� AlumMum �OP� '—' <br />— ., a <br />W <br />100 <br />i6o <br />200 <br />zso <br />�00 <br />600 <br />E00 <br />800 <br />1000 <br />1200 <br />1900 <br />2000 <br />2600 <br />�000 <br />4000 <br />G000 <br />y0 <br />aLo <br />�/0 <br />� <br />360 <br />�00 <br />G00 <br />700 <br />i <br />t <br />tI0 <br />2/0 <br />3/0 <br />4f0 <br />260 <br />360 <br />40U <br />600 <br />�00 <br />80� <br />1200 <br />120� <br />e <br />8 <br />e <br />4 <br />1 <br />o` <br />0 <br />p/0 <br />uo <br />310 <br />3/0 <br />3� <br />3/0 <br />3/0 <br />3/0 <br />3/0 <br />7!0 <br />;f/0 <br />4 <br />1 <br />s <br />0 <br />�lo` <br />3I0 <br />4I0 <br />A(0 <br />260 <br />260 <br />i60 <br />260 <br />260 <br />260 <br />]8(1 <br />260 <br />260 <br />0 <br />n <br />2 <br />a` <br />2/0 <br />2/0 <br />3/0 <br />Z�a <br />300° <br />,�e <br />�e <br />e�d <br />��e <br />90U <br />1260 <br />s <br />0 <br />7/0� <br />3I0 <br />�/0 <br />4!0 <br />2so <br />I60 <br />,�d <br />6004 <br />700� <br />760� <br />1000° <br />1260 <br />760U <br />B000 � �----�— <br />� 5N Tabl� 43•3 �o� �QUI�+LL nl ar�a af bm. Sln uf qraunE E�» lo E� p�r 7aCb 2]•2 bMd on ta�umm 1—� <br />of T�d� Y].1• <br />�.1�Klmum �mp�n ���Inp o� IN'�«��ho�rE o� c��cull avercurt��� a���° �h�d ol �qulpm��� OrounO �V <br />mum. <br />�If lh� amp��� ��Un9 h 400 �nd l�� wtr� �erminsl mnnaclo�f for Ou mdn �ervl<e conduclort .n abd or <br />ec�onA��ol�lhM ���uMnm Y b faEutsd (o NoM2 AWO < PPef o� Nor'0 AWG �luminum" No. G00 MCM <br />Th� aou uctlon mW b� f�euccd�to `oSaiuTIOUm)r�n•inYO����'�^�wl chbOa tlf���etli11]00�mPero <br />coneuclor a� �M uma m�terl�l � PO <br />�ntl �Uon. Thlt appl��� Mhan It�e cwu �Xllun���� �k�� ^Y°z�t It i�ml�ea by ine wln �annlne <br />conn�clon Vravld�d. i Z'� ountl Uut, l�e m��� bOndlnO lumper <br />°U lhe graundlnq el�ctrotla candu<lot lermin�l la loc�led a� �n� 7� <br />�b�ll W� but brt �U�tl In r:ca�dance wlin T�d� �3.2 b+��fl on TaDla 37.1. <br />23.9 A sccond:+ry circuit o[ a powcr or control <br />powcr transfonner shall bc groundcd under �ny of <br />U�c following cunditions if thc circuit cxtcnds or <br />may extend Ucyond lhc scction in which thc <br />transformer is mountcd: <br />p, If thc sccondary is Icss than 50 volts �md thc <br />transformer supply is over 150 volts to ground <br />�r the trAnsCormcr supp�y �� �'"Y °D����� �s <br />ungroundcd, or <br />13. If thc sccondary is Ci0 volts or �,Tcatcr :+nd <br />thc sccondary circwt can bc so`gt' a��od ��hc <br />thc maximum voltagc to � <br />uitgrowidcd conductors docs not cxcecd 150 <br />vulle. <br />69 <br />23.10 If a lrans(onncr sccondary is rcquircd lo bc <br />gruwidcd in accord;vicc witlt p��ragraph 23.9, a <br />main bunding ju�»per shali bc f��ctoi}' conncctcd to <br />thc transfurmcr scconda�)' 1nd to t6c gro�md bas <br />�Ilic��sitc uC� t'hc11mtin�tbo�ding jumper sl all bccas <br />spcciftcd in 'fablcs 23.1 :+nd 23.2 b:ucd �m thc <br />Iransfonncr scrondary' currcnt raUn6• A Br°°°�1�°K <br />cicctrodr. conducwr conncctor sizcd in accurdancc <br />witl� Tab�cs 23.1 (columns 4 and 5) and 23.2 shall <br />bc pr�ividcd un thc grounci bus (i( any) in thc <br />scction contaiuing thc vansformcr or in :m <br />adjoining scction and a marking as covcred in <br />paragraph 38.79 shall bc providccl. <br />:.:x <br />� <br />� <br />H h <br />y r: <br />r. . <br />�� <br />°ct <br />cY L <br />� . <br />i <br />�� <br />�; <br />�. ' <br />< <br />r; <br />v` <br />�`; <br />�_ <br />� <br />