Selection of Main CB and Branch CB(22.8.12).xlsx

	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z	AA	AB	AC	AD	AE	AF	AG	AH	AI	AJ	AK	AL	AM	AN	AO	AP	AQ	AR	AS	AT	AU	BX	BY	BZ	CA	CB	CC	CD	CE	CF	CG
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2		Jignesh.Parmar www.electricalnotes.wordpress.com jiguparmar@yahoo.com						SELECTION OF MAIN CIRCUIT C.B AND BRANCH CIRCUIT C.B , WIRE
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4													RCCB			MCCB Rating(min)As per NEC 210.
5													Size(Amp)	63
6													Type	D Type		Roughly Estimate of ISC(KA) At this Point
7													Triping(Amp)	725		Near 3 Ph T.C Kva			1000
8	N.B : Enter Your Detail in white Background Cells						2. ENTER LOAD DATA						Sen.I∆n	I∆n:30ma		Rough ISC(KA)			28
9													Brea.Cap(KA).	min 28		OR Known Value of ISC(KA)
10							3. SELECT BRANCH C.B						Pole	3or4		Final ISC(KA)			28
11													Load (Amp)	36.25
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14				As Per NEC section:210
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16																																														1	Ltg	B	Cont	23.58		AWG
17	RCB			MCCB			MCB			MCCB			RCCB		4	RCCB			RCCB			ELCB			RCB			RCCB			RCBO			ELCB			RCB			ELCB			RCCB			3	Heater	B	Non-Cont	17.39		MM2
18	Size(Amp)	25		Size(Amp)	0		Size(Amp)	20		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0		Size(Amp)	0			Drive	C	Max.MCCB	25	50
19	Type	C Type		Type	0		Type	C Type		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0		Type	0			A.C	C	NEC	40.97	50.00
20	Triping(Amp)	189		Triping(Amp)	0		Triping(Amp)	174		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0		Triping(Amp)	0			Motor	C	Total Amp	36.25
21	Sen.I∆n	I∆n:30ma		Sen.I∆n			Sen.I∆n			Sen.I∆n			Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n			Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma		Sen.I∆n	I∆n:30ma			Ballast	C
22	Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4		Pole	3 or 4			Ind.Load	C							D Type
23																																															T.C	D			NEC	Amp	MCCB		3
24	Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK		Cable selection	OK						Cont	23.6	18.86	25	C Type	2
25	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10	Size(mm2)		10						0.0	0.00	0	0	3
26	Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)			Length (mt)				MCB			Non-Cont	17.4	17.39	20	C Type	2
27	Max.Length	760		Max.Length	0		Max.Length			Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0		Max.Length	0			MCCB				0.0	0.00	0	0	3
28																																															RCB				0.0	0.00	0	0	3
29																																															ELCB				0.0	0.00	0	0	3
30																																															RCCB				0.0	0.00	0	0	3
31	Load	18.9Amp		Load	0Amp		Load	17.4Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp		Load	0Amp							0.0	0.00	0	0	3
32																																																			0.0	0.00	0	0	3
33	Ph	3		Ph			Ph	3		Ph			Ph			Ph			Ph			Ph			Ph			Ph			Ph			Ph			Ph			Ph			Ph								0.0	0.00	0	0	3
34	Volt	440		Volt			Volt	415		Volt			Volt			Volt			Volt			Volt			Volt			Volt			Volt			Volt			Volt			Volt			Volt								0.0	0.00	0	0	3
35	Kw	5.5		Kw			Kw	10		Kw			Kw			Kw			Kw			Kw			Kw			Kw			Kw			Kw			Kw			Kw			Kw								0.0	0.00	0	0	3
36	Fur.Kw	6		Fur.Kw			Fur.Kw	0		Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw			Fur.Kw								0.0	0.00	0	0	3
37	Total Kw	11.5		Total Kw	0		Total Kw	10		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0		Total Kw	0							0.0	0.00	0	0	3
38	P.F	0.8		P.F			P.F	0.8		P.F			P.F			P.F			P.F			P.F			P.F			P.F			P.F			P.F			P.F			P.F			P.F								0.0	0.00	0	0	3
39	Amp	18.9		Amp	0.0		Amp	17.4		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0		Amp	0.0
40	Type	A.C		Type			Type	Motor		Type			Type			Type			Type			Type			Type			Type			Type			Type			Type			Type			Type
41	Natur.	Cont		Natur.			Natur.	Non-Cont		Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.			Natur.
42	NEC Amp	23.6		NEC Amp	0.0		NEC Amp	17.4		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0		NEC Amp	0.0
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