1100 Volts Unarmoured Cables - 2.5 mm2
Type 'YY'  to IS:1554(I) - 1988
Sl.			NUMBER OF CORES
No.	Description	Unit	2	3	4	5	6	7	8	9	10	12	14	16	19	21	24	27	30	33	37	44	52	61
	Constructional Details
	Conductor
1	Materials												PLAIN ANNEALED COPPER
2	No of Wire	nos.											7/0.67
3	Shape												Stranded Circular
	Insulation
4	Type												PVC Compound Type A to IS:5831
5	Nominal thickness	mm	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90	0.90
6	Colour Scheme for identification		TWO CORE  - Red, Black											THREE CORE - Red, Yellow, Blue
	Inner Sheath  & Outer Sheath		FOUR CORE - Red, Yellow, Blue, Black											FOUR CORE - Red, Yellow, Blue, Black, Grey
	(Applied in one operation)		SIX CORE AND ABOVE - Two adjacent cores (I.e counting core & direction core) in each layer
						Shall be Blue & Yellow respectovely and remaining cores shall be Grey
7	Type												PVC Compound Type ST 1 to IS:5831
8	Colour												Black
9	Minimum Thickness of inner sheath	mm	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.4	0.4	0.4	0.4	0.4
	Nominal thickness of outer sheath	mm	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	1.8	2.0	2.0	2.0	2.0	2.0	S	2.0	2.0	2.2	2.2	2.2	2.2	2.2
10	Dia over Laid up core	mm	7.70	8.30	9.30	10.30	11.50	11.50	12.40	13.20	14.00	15.30	16.90	18.00	19.20	20.40	23.20	23.6	24.80	25.70	26.80	30.60	32.10	34.50
11	Dia over Inner Sheath	mm	8.70	9.30	10.30	11.30	12.50	12.50	13.40	14.20	15.00	16.30	17.90	19.00	20.20	21.40	24.00	24.60	25.60	26.90	28.00	31.80	33.30	35.70
12	Approximate overall diameter of cable	mm	14.20	14.80	15.80	16.80	18.00	18.00	19.20	19.00	19.80	21.10	22.70	23.80	25.00	26.20	28.80	29.40	30.80	31.90	33.00	36.80	38.30	40.70
	ELECTRICAL CHARACTERISTICS
13	Resistance of conductor per
	1000m length of completed cable
	a) Maximum d.c. resistance at 20 Deg C	ohm											7.41
	b) a.c. resistance at 70 Deg. C	ohm											8.866
14	Continuous current rating (a.c.) of
	cables under standard conditions
	i) When laid direct in ground	amps	32	27	27	23	21	20	19	18	18	17	16	15	14	13	13	12	12	11	11	10	10	9
	ii) When laid in ducts	amps	27	24	24	19	18	17	16	15	15	14	13	13	12	11	11	10	10	9	9	9	8	8
	iii)When laid in air	amps	27	24	24	19	18	17	16	15	15	14	13	13	12	11	11	10	10	9	9	9	8	8
15	Reactance per 1000m length of cable												0.087
	at 50 Hz	ohm
16	Capacitance between conductors per	Micro											0.120
	1000m length of cable	farad
17	Minimum volume resistivity of PVC Insu	Ohmcm											1 X 10 13 AT 27 Deg C and 1 x 10 10 at 70 Deg C
18	Maximum permissible shortcircuit	kilo											0.288
	current for duration of one second	amps
19	Voltage drop per 1000m length of
	cable (assuming three phase a.c. systems)
	a) When laid direct in ground	volts	567	479	479	408	372	355			319	301	284	266	248		231	213	213		195	177	177	160
	b) When laid in ducts	volts	479	426	426	337	319	301			266	248	231	231	213		195	177	177		160	160	142	142
	c) When laid in air	volts	479	426	426	337	319	301			266	248	231	231	213		195	177	177		160	160	142	142
	GENERAL :
20	Approximate net weight per
	1000m length of finished cable	kg	186	228	273	320	367	397	442	486	529	633	721	804	922	1007	1142	1253	1366	1501	1686	1980	2207	2621
21	Standard length of cable (Subject to a
	manufacturing tolerance +/-5%)	m											500
22	Drum Dimensions-
	a) Approximate overall height	mm	840	840	840	940	940	940			1140	1140	1140	1250	1250		1450	1450	1450		1450	1650	1650	1650
	b) Approximate outer width	mm	515	515	665	690	690	690			715	715	715	855	855		855	855	855		855	1130	1130	1130
23	Approximate gross weight of drum	kg	155	170	200	220	270	280			395	440	480	555	615		785	840	900		1060	1350	1500	1675
24	Minimum bending radius for laying of CBL												12  x  Overall Diameter of Cable
25	Recommended pulling force:
	a) When conductor pulled by pulling eye	N											50 x Total Conductor Area in mm2
	b) When cable pulled with stocking	N											5 x D2 where D is the Overall Diameter of cable in mm
													STRANDED CONDUCTOR IS ALSO PERMISSIBLE IN THESE SIZES