a.
Conductors of primary cables shall be in
accord with the following specifications:
1.
IPCEA General Specifications, Part 4 for
Class C stranding of power cables.
2.
alloy coated.
Conductors shall be tin,
lead or lead
3.
Insulation shall be for 5,000 volts in
accord with the following specifications (Ozone and heat
resisting compound 75 degrees C.).
(a)
ASTM Specifications D574-46T,
(bo)
IPCEA General Specifications on
rubber cables, Appendix "D".
{c)
Insulation thickness shall be in
accord with IPCEA General Specifications,
5 for 5000 volt ungrounded cables.
cables.
(d)
table II,
Part
Physical properties, 5000 volt
(1)
Tensile strength min. 500 p.s.i.
2) Tensile strength after 168
hour oven test at 100°C - 400 p.s.i.
(3) oElongation at rupture after
168 hour oven test at 100°C - 250%.
(4)
Tensile strength after 168 hour
oxygen pressure test at 80°C - 400 p.s.i. min.
(5) Elongation at rupture after 168
hour oxygen pressure test at 80° C - 250% min.
(6)
Ozone resistance - .030%
(7)
Insulation resistance K valve
(8)
Power factor - max. % 4.0
concentration 4 hours.
min. 15,840 ohms.
(9)
0
Copper operating temp. 80 C.
(e) Jacket shall be in accordance with
the following specifications (Palychloroprene).
15-6