Okonite Okoguard® URO 15kV Underground Primary Distribution Cable Aluminum Conductor/90°C Rating 133% Insulation Level

A Conductor-Stranded Aluminum

B Strand Screen-Extruded Semiconducting EPR

C Insulation-Okoguard

D Insulation Screen-Extruded Semiconducting EPR

E Concentric Conductor-Annealed Coated Copper Wires

Insulation
Okoguard is Okonite's registered trade name for its exclusive ethylene-propylene rubber (EPR) based, thermosetting compound, whose optimum balance of electrical and physical properties is unequalled in other solid dielectrics. Okoguard insulation, with the distinctive red color and a totally integrated EPR system, provides the optimum balance of electrical and physical properties for long, problem-free service.

The triple tandem extrusion of the screens with the insulation provides optimum electrical characteristics.

An insulation screen of ethylene-propylene rubber is extruded over the insulation. The annealed coated copper wires are uniformly spaced around the insulation screen.

Applications
Okoguard URO cables provide excellent circuit longevity in underground residential distribution systems. They can be buried direct or installed in underground ducts or conduits.

Specifications
Central Conductor: Aluminum per ASTM B-609, Class B stranded per B-231.

Conductor Screen: Extruded semiconducting ethylene-propylene rubber meets or exceeds the requirements of ICEA S-94-649/NEMA WC74 & S-97-682 and AEIC CS8.

Insulation: Extruded Okoguard meets or exceeds the requirements of ICEA S-94-649/NEMA WC74 & S-97-682 for ethylene-propylene rubber and AEIC CS8.

Insulation Screen: Extruded semiconducting ethylene-propylene rubber meets or exceeds the requirements of ICEA S-94-649/NEMA WC74 & S-97-682 and AEIC CS8.

Concentric Conductor: Annealed coated copper wires.

Product Features

Triple tandem extruded, all EPR system
Okoguard cables meet or exceed NEMA/ICEA standards and REA U-1.
90°C continuous operating temperatures
130°C emergency rating
250°C short circuit rating
Excellent corona resistance.
Low dielectric constant and power factor.
Screens are clean stripping.
Exceptional resistance to "treeing".
Moisture resistant.
Excellent resistance to most chemicals.
Design Options:
Additional conductor sizes
Filled strand
Copper central conductor
Improved Temperature Rating.

Okoguard insulation system has been tested and qualified for operation at 105°C continuous and 140°C emergency operating temperature.

1-Catalog Number
2-Conductor Size - AWG or kcmil
3-Nominal Dia. over Insulation
4-Nominal Dia. over Insulation Screen
5-Copper Neutral - No. x AWG

06-Nominal O.D. - Inches
07-Approx. Net Weight - lbs./1000'
08-Approx. Ship Weight - lbs./1000'
09-Ampacity Direct Burial(1)
10-Ampacity Duct(1)

1	2	3	4	5	6	7	8	9	10
FULL NEUTRAL
161-23-3910	2(7x)	0.78	0.85	10 x 14	0.98	481	571	170	120
161-23-3916	1(19x)	0.81	0.89	14 x 14	1.02	555	645	195	135
161-23-3922	1/0(19x)	0.85	0.93	16 x 14	1.06	635	725	220	155
161-23-3925	2/0(19x)	0.90	0.97	14 x 12	1.13	746	836	250	175
161-23-3928	3/0(19x)	0.95	1.02	16 x 12	1.18	867	957	285	200
161-23-3931	4/0(19x)	1.01	1.08	14 x 10	1.28	1035	1135	325	230
161-23-3934	250(37x)	1.06	1.16	16 x 10	1.37	1228	1344	360	255
161-23-3940	350(37x)	1.17	1.27	20 x 10	1.47	1514	1692	425	300
1/3 NEUTRAL
160-23-3910	2(7x)	0.78	0.85	6 x 14	0.98	429	519	160	135
160-23-3916	1(19x)	0.81	0.89	6 x 14	1.02	464	554	180	155
160-23-3922	1/0(19x)	0.85	0.93	6 x 14	1.06	506	596	205	175
160-23-3925	2/0(19x)	0.90	0.97	8 x 14	1.10	568	658	235	200
160-23-3928	3/0(19x)	0.95	1.02	10 x 14	1.15	653	743	270	230
160-23-3931	4/0(19x)	1.01	1.08	12 x 14	1.21	752	852	300	240
160-23-3934	250(37x)	1.06	1.16	14 x 14	1.29	873	973	330	260
160-23-3940	350(37x)	1.17	1.27	18 x 14	1.39	1092	1208	390	320
160-23-3943	500(37x)	1.29	1.39	16 x 12	1.56	1405	1583	470	385
160-23-3946	750(61x)	1.49	1.59	16 x *	1.79	1920	2170	570	470
160-23-3949	1000(61x)	1.64	1.77	18 x *	1.98	2465	2813	665	550

* Special conductor size

(1) Ampacities

Full neutral, single phase ampacities are based on ICEA S-94-649, Appendix F for 90°C conductor temperature, 20°C ambient temperature, 100% load factor and an earth thermal resistivity of RHO 90.

One third neutral, three phase ampacities are based on ICEA P-53-426 triplexed or triangular configuration for the same conditions stated above.