Emerson SERIES 600T manual Types TW= FEPW= TBS, SA

Table 310-16. Allowable Ampacities of Insulated Conductors

Rated 0-2000 Volts, 60 to 90C (140 to 194F)

Not More Than Three Conductors in Raceway or Cable or

Earth (Directly Buried), Based on Ambient Temperature of 30 (86F)

Size				Temperature Rating of Conductor. See Table 310-13.				Size
	60oC	75°C		90°C	60°C	75°C	90°C
	(140°F)	(167°F)		(194°F)	(140°)	(167°F)	(194°F)
	TYPES	TYPES		TYPES	TYPES	TYPES	TYPES
	TW=	FEPW=,		TBS, SA,	TW=	RH=, RHW=,	TBS,
AWG	UF=	RH, RHW=,		SIS, FEP=	UF=	THHW=,	SA, SIS,	AWG
		THHW=,		FEPB=, MI,		THW=,	THHN=,
kcmil		THW=,		RHH= RHW-2		THWN=,	THHW=,	kcmil
		THWN=,		THHN=, THHW=,		XHHW=,	THW-2, THWN-2,
		XHHW=,		THW-2, THWN-2,		USE=	RHH==, RHW-2,
		USE=, ZW=		USE-2, XHH,			USE-2,
				XHHW=			XHH, XHHW=,
				XHHW-2, ZW-2			XHHW-2, ZW-2
		COPPER			ALUMINUM OR	COPPER-CLAD ALUMINUM
18	......	.......		14	.......	.......	.......	.......
16	......	.......		18	.......	.......	.......	.......
14*	20	20		25	.......	.......	.......	.......
12*	25	25		30	20	20	25	12*
10*	30	35		40	25	30	35	10*
8	40	50		55	30	40	45	8*
6	55	65		75	40	50	60	6
4	70	85		95	55	65	75	4
3	85	100		110	65	75	85	3
2	95	115		130	75	90	100	2
1	110	130		150	85	100	115	1
1/0	125	150		170	100	120	135	1/0
2/0	145	175		195	115	135	150	2/0
3/0	165	200		225	130	155	175	3/0
4/0	195	230		260	150	180	205	4/0
250	215	255		290	170	205	230	250
300	240	285		320	190	230	255	300
350	260	310		350	210	250	280	350
400	280	335		380	225	270	305	400
500	320	380		430	260	310	350	500
600	355	420		475	285	340	385	600
700	385	460		520	310	375	420	700
750	400	475		535	320	385	435	750
800	410	490		555	330	395	450	800
900	435	520		585	355	425	480	900
1000	455	545		615	375	445	500	1000
1250	495	590		665	405	485	545	1250
1500	520	625		705	435	520	585	1500
1750	545	650		735	455	545	615	1750
2000	560	665		750	470	560	630	2000
				CORRECTION FACTORS
Ambient		For ambient temperatures other than 30°C (86°F), multiply the allowable ampacities						Ambient
Temp °C			shown above by the appropriate factor shown below.					Temp °F
21-25	1.08	1.05		1.04	1.08	1.05	1.04	70-77
26-30	1.00	1.00		1.00	1.00	1.00	1.00	78-86
31-35	.91	.94		.96	.91	.94	.96	87-95
36-40	.82	.88		.91	.82	.88	.91	96-104
41-45	.71	.82		.87	.71	.82	.87	105-113
46-50	.58	.75		.82	.58	.75	.82	114-122
51-55	.41	.67		.76	.41	.67	.76	123-131
56-60	.......	.58		.71	.......	.58	.71	132-140
61-70	.......	.33		.58	.......	.33	.58	141-158
71-80	.......	.......		.41	.......	.......	.41	159-176

*Unless otherwise specifically permitted in Section 240-3 of this Code, the overcurrent protection for conductor types marked with an asterisk (*) shall not exceed 15 amperes for No. 14, 20 amperes for No. 12, and 30 amperes for No. 10 copper; or 15 amperes for No. 12 and 25 amperes for No. 10 aluminum and copper-clad aluminum after any correction factors for ambient temperature and number of conductors have been applied.

Reprinted with permission from NEC 1999, NFPA 70, the National Electrical Code , Copyright 1998, National Fire Protection Association, Quincy, MA 02269. This reprinted material is not the complete and official position of the National Fire Protection Association, on the referenced subject which is represented only by the standard in its entirety.

24 Installation Manual

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