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' � • DEMFRONTAWI7CHEOARD9 �91 bg <br />' AUGU9T 28, 1978 <br />TABLE T3.1 <br />612E OF BONDINO,CONDUCTORS AND OROUND BUSNDINO ELECTRODE <br />IM�Klmum 9:� of Equlpm�nt Oroundlnp <br />$�i+Of�fW11d�11Y �pf1��110011dI1p <br />Amp h+ or Bondlrq Conduc�w Mlnimum M n1�o�A O�MCM) AWO a MCM) m <br />qnl�o (AWO a MCM) <br />90 <br />100 <br />160 <br />200 <br />260 <br />400 <br />600 <br />800 <br />tl00 <br />t000 <br />�700 <br />1800 <br />2000 <br />saoo <br />a000 <br />♦000 <br />6000 <br />8000 <br />Copp�r <br />7 <br />1 <br />1 <br />0 <br />Y/0 <br />3Lf1 <br />uo <br />I60 <br />760 <br />�oo <br />600 <br />700 <br />B00 <br />AlumMum <br />1 <br />1 <br />Y/0 <br />2/0 <br />3/0 <br />4/0 <br />sso <br />360 <br />�00 <br />800 <br />soo <br />800 <br />1200 <br />t�Ofl <br />CoPP� <br />8 <br />6 <br />8 <br />4 <br />2 <br />0� <br />0 <br />2/0 <br />yo <br />3/0 <br />�/a <br />3Jj1 <br />3/0 <br />3/0 <br />sio <br />3/0 <br />3/0 <br />9/0 <br />Aluminum <br />4 <br />4 <br />I <br />0 <br />3/0� <br />3!0 <br />410 <br />uo <br />260 <br />no <br />260 <br />Y60 <br />260 <br />�o <br />2eo <br />260 <br />260 <br />�PPr <br />8 <br />8 <br />4 <br />2 <br />0� <br />0 <br />Z/II <br />sro <br />3;0 <br />�a <br />�d <br />,�a <br />�e <br />eoo° <br />�so° <br />900 <br />1460 <br />Atuminum <br />2 <br />0 <br />3/0� <br />3/0 <br />1/0 <br />4/0 <br />2G0 <br />xso <br />�oo° <br />�a <br />��d <br />��tl <br />i000° <br />1760 <br />1600 <br />�� T�p�� p�,p (or �qulwlenl ana ol hm. Slna o! prountl Gm lo b� pu T+bl� 27.2 bwE on columm 1-3 <br />of T�W� ��•�• <br />�M�Kimum �mpn• ntlnp of twllUiboarG or cifcWl avucurnnt Nvin a�atl ol �qulpmml qrounClnp <br />muna. <br />°If tb� �mp�n nllnp b 400 anE IM wln tuminal conn�clan �or In� m�ln urvlce mnduclon u� r+4C far <br />two �. 3/0 AWa copper or lwo Na.230 MCM �luminum conGucto�� bul wlll not �cc�pt � No. 600 MCM <br />con0uctor, IM'� ��luu m�Y b� ��duc�d to No. II AWd ceppef or Na. 0 AWO �luminum. <br />�ne crou wcl�on meY b� ��duc�tl to 12.5 Perc�nt of t�� lobl crm� s�ctian af Ih� IVW�I m�ln wrvlce <br />contluclor of tM wmc m�brl�l (cop0�� or aluminum� �or anY qhw on twllchEartl� nt�d 1200 �mpnrn <br />ana �bov�. Thli �pPllu when the crass i�c��anfoL�Q� ���� �SIZ£� I� IlmlteE Uy lbe wln t�rminal <br />conn�clOrs providM. � Z . � X <br />°�1 �p� qroundin9 aleclrotl� cantluUor l�rminal It IouUtl on t�� qrOunE Dm, lhe maln Dontllnp �umpef <br />ihtll W a put bar +Ix�tl In �ccordant� Wlln Tid� 23.2 bawE on T�ON Y].l. <br />23,9 A secondary circuit of a powcr or control <br />powcr transformer shall be grounded undcr any of <br />tFtc following conditions if thc circuit extcnds or <br />may extend bcyond the scction in which thc <br />trans(ormer is mowitcd: <br />A. I( thc secondary is Icss than 50 volts and thc <br />tranaformer aupply is over 150 volts to ground <br />or the transformcr supply at any voltagc is <br />ungrounded,or <br />B. !f the secondary is 50 volts or grcatcr and <br />thc secondary circuit can be so grounded that <br />the maximum voltage to gruwid on thc <br />urtgrounded conducwrs docs not cxcccd 150 <br />velle. <br />23.10 If a u:msCormcr sccondary is rcquired to bc <br />growidcd in accordancc with paragraph 23.9, a <br />mxin bundingjumper shall bc factory wnncctcd to <br />thc tr;msfurmcr sccondary and to thc ground bus <br />ur tu U�c cnclur,urc if a ground bus is not providcd. <br />'fhc sizc of �hc main bonding jumper shall bc .0 <br />specificd in Tablcs 23.1 and 23.2 bascd on thc <br />transformcr sccondary current rating. A gr�unding <br />cicctrodc conductor connector sizcd in accurd:mcc <br />with Tablcs 23.1 (columns 9 and 5) and 2.3.2 shall <br />bc pruvidcd on lhc ground bus (if any) in thc <br />scction containing thc trans(onncr or in vi <br />adjouiing scction and a mazking as eovcrcd in <br />paragraph 38.79 shall bc providc<I. <br />