SAE J1067:2020 pdf free

SAE J1067:2020 pdf free.Seven Conductor Cable – Truck and Bus
An electrode which makes direct mechanical contact with the surface of the insulation of the wire or cable undergoing test shall be used. A pipe, coiled spring, or the like shall not be acceptable. If the link bead-chain type of electrode is used, the bottom of the metal electrode enclosure shall be“V”-shaped. The chains shall have a length appreciably greater that the depth of the enclosure. The width of the trough shall be approximately 38 mm (1.5 inches) greater than the diameter of the largest wire or cable to be tested. If a bead-chain type of electrode is used, the beads shall have a diameter of 5 mm (3/16 inch). The longitudinal spacing of the chains shall not be more than 13 mm ( 1/2 inch). The transverse spacing of the chains shall not be more than 9.5 mm (3/8 inch), except that the spacing may be 13 mm (1/2 inch) if the transverse rows of chain are staggered. The electrode shall be provided with a grounded metallic screen or the equivalent as a guard against contact by personnel. The length of the electrode shall be sufficient to meet the requirements in 6.2.5.2.
The spark test shall be conducted as near to the end of the manufacturing process as is practicable. The test voltage shall be as specified in the detailed specification. The specimen shall be attached to the electrode and the electrode connected to one lead of the transformer secondary. Both ends of the conductor of the specimen, the other secondary lead and the transformer core shall be grounded. A direct connection shall be made between the ground of the conductor at the take-up end of the transformer secondary ground. The voltmeter located in the circuit shall indicate the test potential at all times during the test. The speed of the specimen through the electrode shall be adjusted so that contact between the electrode and any point on the insulation of the specimen will be maintained for at least 0.15 second. This rate limits the speed of the specimen travel to a maximum of 10 m (33 feet) per min per 25 mm (1 inch) of electrode length. Unless otherwise specified in the detailed specification, the entire delivery of the wire shall be tested.SAE J1067 pdf free download.