PTT SERIE 88 Outdoor Telephone Cable

Cable Construction

Technical Data

1 - Conductor	:	Electrolytic annealed solid copper (CCITT Yellow Book Vol. III-2-G.541 B article, IEC 28 and ASTM B 3).
2 - Insulation	:	Color coded solid polyethylene insulation (BS 6234 Type 03 - ASTM D 1248).
3 - Stranding	:	Star quads are assembled into 14 or 28 pairs units. Groups having 28, 56 or 112 pairs are stranded together.
4 - Wrapping	:	A non-hygroscopic and dielectric polyester tape is applied on the cable core longitudinally or helically.
5 - Screen	:	Both sides are coated with copolymer coated flat aluminum tape over cable core longitudinally for screening.
6 - Outer Jacket	:	Linear low-density or medium-density, UV resistant black polyethylene outer jacket (ASTM D 1248).

	Conductor Diameter
	0.40 mm	0.50 mm	0.60 mm	0.63 mm	0.65 mm	0.80 mm	0.90 mm
Conductor Resistance Ω/km (20 °C)
Maximum Average	139,4	89,4	62,1	58	57	35	27,6
Maximum Individual	146,6	93	64,6	60	58	37	28,8
Insulation Resistance MΩ/km (500 VDC)	>10000	>10000	>15000	>15000	>15000	>15000	>15000
Mutual Capacitance nF/km (800 Hz)
Maximum Average	50	50	45	45	45	45	45
Maximum Individual	56	56	51	51	51	51	51
Capacitance Unbalance pF/500 m
Between Pairs
Maximum Average	125	125	60	60	60	60	60
Maximum Individual	350	350	325	325	325	325	325
Between Adjacent Quads
Maximum Average	125	125	60	60	60	60	60
Maximum Individual	275	275	270	270	270	270	270
To Screen
Maximum Average	500	500	325	325	325	325	325
Maximum Individual	2000	2000	1300	1300	1300	1300	1300
Dielectric Strength
V (DC, 1 minute)
Pair - Pair	1400	1400	2000	2000	2000	2400	3000
Pair - Screen	1400	1400	2000	2000	2000	2400	3000
V (DC, 3 second)
Pair - Screen	9000	9000	9000	9000	9000	9000	9000