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. ' ' . ; ' � + � 370-16.Number of Canductora In Outlet,Device,and Junctlon Baxea,and Condult Hodles. Hoxes and conduit bodies shall be of sulTicient size to provide t'ree spTce for all enclosed conductore.In no ease shall the volume of Q�e bo�as aalculated'ui(a)below*be less than ilie fill calculation as calculated in(b)belnw.The minimuttt volume for aonduit bodies ehall bo an aalculafed'ui{a}botnw. '['he pravisions of Ihis seclion shall not apply to teiminal housings supplied with motor�.See 5ecdon 430-12. I3oxes and candait bodies enctosing conductots,size N�.4 or Iarger,shall alsn comply wiih the provisions of Section 37U-28. Q+�)Boac Voiume Calcuiations.l�re volume of a wiring enclosure(box)shali be the total volame of the assetnbled � sections,and,where used,the epace prarvided by plaster rings,damed covere,extension�ing;s,etc.,that are marked with ; thcir voIume in cutric inches or are made�nm boxes ihe d'uneiisians of which are 2is#ed'ui Table 370-16(a}. (1)Standard Boaes.'1'1►e volumes of standard boxes tliat are not marked with a cubic inch oapacity shall be as given in'Table 37Q-16(a). (2)Other Bo:es.Boxes 100 cuUic inch(164U cu in.)ar less,other than tl�ose described in Table 370-16(a),and nnnmetatGe boxes shalI be durably and tegibly marked by tlte n�anufaclurer with their cubic inoh cagaaity.Boxes described in'Tabie 370-1G(a)that t�ave a larger cubic inch capacity Wan ie designatecd in flie table shall be pern�ilted to ' have their aubic inch capacity marked as required by Uus aection. (b)Boz Fill Calcutatians.The volumes ui paragrapI�s(1}4uaugh(5)below,as applicable,shall be added Wgether.No allowance sl�all be reyuired for small fittings such as locknuls and bushinga. (I)Conductor rili.Each conductor fhat originates oufside the box auad ternunates or is spliced witluit�the box ahall be counted ance,and each canductor that passes thraugh tl�c box withoul splice or terniictation ehall be counted once.'Thc conduetor fill,in cubie iztches,sha(1 be computecf using Table 3'TQ-16(b).ti conductor,na gart of which leaves ihe box, shall not be counted: Exception:FVltere an equipnrettt groursdtng conductor or not ouer four frxture wires smaller ihan No.I4,ar boih, enter a ba�c from a domer�frxture or similar canopy and termi�yate within ll�at bax, it shall be permitted to om}t these conductors from ihe calculations. ' (2)Clamp Fill.Where otie or:mare internal cable clamps,wl►elher factory or lield auppliecl,are preaent in the box,a eingle volurne allowance in accordance wilh Table 370-16(b)shall be macie based on the aargest conductor present in the box.No altowance shaEl be required for a cable connector with its ciamping meoltanism autside the bo�c. (3)Support Fitqngs Fill.WLere one ar more fixture etuds or hickeye are present in t1�e box,a singlo volume allowance in accorcSance wiQz Z'able 370-16(b)sliaq be made for each type of fitBng basec!on the largest conctuctor present in the box. (4)Device or Eqaipment Fiil.For each yoke ar strap contaaung onc or more devices or eqnipment,a double votutnc . allowance in accorclance with TaUle 370-16(b)shall be made for each yoke or sirap based on the largest conductor cnnnected tn a device(s)ar equipment supp�ded by Il:at yoke or alrap. ' (5)Equipment Grounding Conductor Fill.Where one or more equipment grounding condueto:a enteis a box,a single volume allowance in accorclance with Table 370-1G(b)shatl be made based on the largest equipment grounding conductor present in the bax.Where an addidonat set of eguipment groanding eonc3ucWre,as petmitted by Section 25q-74,Exception No.4,ia present in the box,an additinnal voltune allowance ahall be made based on tlte largest cquipmenk groundit�g conductor in ihe additionat seE. Copyrlght 1495 NrFA ,