GE 225, 300 manual 20

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GE

NEC SECTION 210-20 (a)

Table 310-16. Allowable Ampacities of Insulated Conductors Rated O Through 2000 Volts, 60°C Trough 90°C (140°F Trough 194°F) Not More than Three Current-Carrying Conductors in Raceway, Cable, or Earth (Directly Buried), Based on Ambient Temperature of 30°C (86°F).

Size		Temperature Rating of Conductor (See table 310-13)
	60°C (140°F)	75°C (167°F)	90°C (194°F)	60°C (140°F)	75°C (167°F)	90°C (194°F)
	Types	Types	Types	Types	Types	Types
	TW, UF	FEPW, RH,	TBS, SA, SIS,	TW, UF	RH, RHW,	TBS, SA, SIS,
		RHW, THHW,	FEP, FEPB, MI,		THHW,	THHN, THHW,
AWG		THW, THWN,	RHH, RHW-2,		THW, THWN,	THW-2,
or		XHHW, USE,	THHN, THHW,		XHHW, USE	THWN-2, RHH,
kcmil		ZW	THW-2,			RHW-2, USE-2,
			THWN-2, USE-2,			XHH, XHHW,
			XHH, XHHW,			XHHW-2,
			XHHW-2,ZW-2			ZW-2
		COPPER		ALUMINUM or COPPER-CLAD ALUMINUM
18	---	---	14	---	---	---
16	---	---	18	---	---	---
14	20	20	25	---	---	---
12	25	25	30	20	20	25
10	30	35	40	25	30	35
8	40	50	55	30	40	45
6	55	65	75	40	50	60
4	70	85	95	55	65	75
3	85	100	110	65	75	85
2	95	115	130	75	90	100
1	110	130	150	85	100	115
1/0	125	150	170	100	120	135
2/0	145	175	195	115	135	150
3/0	165	200	225	130	155	175
4/0	195	230	260	150	180	205
250	215	255	290	170	205	230
300	240	285	320	190	230	255
350	260	310	350	210	250	280
400	280	335	380	225	270	305
500	320	380	430	260	310	350
600	355	420	475	285	340	385
700	385	460	520	310	375	420
750	400	475	535	320	385	435
800	410	490	555	330	395	450
900	435	520	585	355	425	480
1000	455	545	615	375	445	500
1250	495	590	665	405	485	545
1500	520	625	705	435	520	585
1750	545	650	735	455	545	615
2000	560	665	750	470	560	630
			CORRECTION FACTORS
Ambient	For ambient temperatures other than 30°C (86°F), multiply the allowable ampacities shown above by the
Temp. (°C)			appropriate factor below
21 - 25	1.08	1.05	1.04	1.08	1.05	1.04
26 - 30	1.00	1.00	1.00	1.00	1.00	1.00
31 - 35	0.91	0.94	0.96	0.91	0.94	0.96
36 - 40	0.82	0.88	0.91	0.82	0.88	0.91
41 - 45	0.71	0.82	0.87	0.71	0.82	0.87
46 - 50	0.58	0.75	0.82	0.58	0.75	0.82
51 - 55	0.41	0.67	0.76	0.41	0.67	0.76

OPM_SGS_ISG_M22_M30_0US_V011.doc 20/38 Installation Guide SG Series 225 & 300 kVA