American Power Conversion MW manual Size Temperature Rating of Cables See Table

Specifications: Electrical Specification

Size		Temperature Rating of Cables (See Table 310-13)					Size
	60oC	75oC	90oC	60oC	75oC	90oC
	(140oF)	(167oF)	(194oF)	(140oF)	(167oF)	(194oF)
		Types	Types			Types
			TBS,SA,SIS,FEP,		Types	TBS,SA,SIS,TH
		FEPW,RH,RH	FEPB,MI,RHH,			HN,THHW,TH
AWG or					RH,RHW,TH		AWG or
	Types	W,THHW,	RHW-2,THHN,	Types		W-2,THWN-2,
kcmil					HW,THW,		kcmil
	TW,UF	THW,THWN,	THHW,THW-2,	TW,UF		RHH,RHW-2,
					THWN,
		XHHW,	THWN-2,USE-2,			USE-2,XHH,
					XHHW,USE
		USE,ZW	XHH,XHHW,XH			XHHW,
			HW-2,ZW-2			XHHW-2,ZW-2
		Copper		Aluminium or Copper-Clad Aluminium
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	285	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 30oC (86oF), multiply the allowable Ampacities shown above by						Ambient
Temp. (oC)			the appropriate factor shown below				Temp. (oF)
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	0.91	0.94	0.96	0.91	0.94	0.96	87-95
36-40	0.82	0.88	0.91	0.82	0.88	0.91	96-104
41-45	0.71	0.82	0.87	0.71	0.82	0.87	105-113
46-50	0.58	0.75	0.82	0.58	0.75	0.82	114-122
51-55	0.41	0.67	0.76	0.41	0.67	0.76	123-131
56-60	-	0.58	0.71	-	0.58	0.71	132-140
61-70	-	0.33	0.58	-	0.33	0.58	141-158
71-80	-	-	0.41	-	-	0.41	159-176

Reprinted with permission from NFPA 70-2005, National Electrical Code®, Copyright © 2004, National Fire Protection Association, Quincy, MA 02169. This reprinted material is not the complete and official position of the NFPA on the referenced subject, which is represented only by the standard in its entirety.

Symmetra MW 1000 kW 480 V Installation - 990-4112E 33