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. 2.0 Applications <br /> . ._ 2.1 General Oescrlpfion ol CI01 Areas <br /> _ Accordinp la Naliona�Flre Pro�ection Associalion(NFPAj 70, NEC 1990 Edilion, � I� <br /> � secGon soo.s ca�: <br /> A CID 1 locatian is a/ocafion(Ij in which ignilable concenna�ions ol llammaWe � <br /> gases or vapors can erisf under normal operaling condifions;or j2J In wAlch <br /> 7gnilable concenl�alions o/such gases or vapors may exisf Irequenlly because o/ <br /> repalr or malnlenance operafbns oi because olleakage;or(3Jln whkh <br /> breakdown orlaulfy operalion o/equipmenl a processes mighl release Ignifable <br /> concenfrations.o/l/ammable gases or vapors,and mqhf also causc slmulfaneous _ <br /> !allure ol e�ectrk equipmenl. <br /> In summary,In CIDt areas,llammable vapors or pases are Irequenlly or�ormally <br /> present In�bncenlralions thal witl fgnile and burn.Hazardous chemkala Ihal may <br /> be presenl in CIDt areas are conskered lo have slmilar ezpbsion and buminp <br /> ctiaraclerislics,end Ihey ere lurther GassiGed accor�irqly. <br /> For groupings ol aboul 1,500 materials,see Natfonal fire Protec�ion Assoclation <br /> (NFPA)Publicatlon 325M,Fire Hazard PropeAies ol Flammable Llquids,Gases, <br /> volaltle solids(t977). <br /> 2.2 Requlremenfs lor Heat-Tracing Systems!n CIDf Areas <br /> Nol�t: 7h�M�enl ol INt requiremenl la The NEC requlres Ihal T-ratinps,or operaling temperalure IO numbers,be merked <br /> •�+p1aMW M NEC S�ctla�500�9(eJ. 7M on equipment used in CIDt localfons(Noie 1). <br /> dbN!n NEC 500J(6J Mtlf k�nlifiulbn � .. � � . .. .. . <br /> numbea�ndma+tmum nmp�n�uns. The surlace lemperalure ol healing cables and other equipmenl must not exceed <br /> Nas 2: Pubaeartnn NFP�J25Mprves _ tha ignitlon lemperalure ol the specllic gas or vapor present in 11e classilled area <br /> ��� IpNlion Nmp�nfuros la har�rWus (Nole 2)_ �) <br /> malerf�h la G�oup B.Q and D <br /> dafdrartons. The FM emblem end Inlormallon about voliage,temperalure,and CID1 sultabflily <br /> NobT. FaL�ndardf fdbwdbyFMN musl be clearly marked on all approved heal�Iracing producls(Nole 3). <br /> tr,�+,q.�o�d:roraoi n..o-v+oww <br /> �ysHm�,pNu�sn IntfHub ol EMddul <br /> �n0 EI�eWMa EnpJm�NArtrotun <br /> . NafbrulSl�nd�MSlnfNluf�(IEEE/ANSI) p,3 TyplcalSysfemwlfhComponenfs <br /> Sland�M5i5,IEEE AerommendM <br /> PiaGtn la IM Tisfhp,Dotipn, . <br /> Ini1�6eUon.�ndMifnfm�nc�ol fMddul To GFPD(EPD) . . 61ass lapa <br /> R�rGhnd H��f TiacMg/a Indusfrfd IYp�ckwll <br /> Applkalb.as. 1990 Edflion. We�ker /wlo�Tran <br /> Pow�r connaclia� M�lirp ub4 • <br /> �P <br /> Pip��Irap Splice a lee TAermal End�eal <br /> �1ulo•Tnu Us reQutrM) insulalion <br /> HXN o�MOTV <br /> Ae�linq uWe <br /> � .1 <br />