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JASO D JASO C JASO B Scope This standard specifies low-voltage cables hereinafter referred to as "cables" used as unscreened single-core low-voltage cables for automobiles, excluding AV low-voltage cables for automobiles specified in JIS C In addition, this standard also applies to individual cores comprising a multi-core cable. Normative reference The following standards, when referred to in this standard, constitute a part of the specifications of this standard.

As required, the most recently updated version of the applicable standard including addenda shall be applied. Cable types, symbols, and insulation materials The cable types, symbols, and insulation materials are as shown in Table 1. Performance Cable performance shall be as specified in Tables 2 to 7. In addition, the performance with different nominal sizes shall be as specified in Tables 8 to The insulation shall not be fractured in the specified test.

The insulation shall not be fractured when the specified voltage is applied. Minimum volume resistivity shall be ? Minimum tensile strength: Minimum values shall be as specified in Table 8. The conductor shall not be exposed after the test. The insulation shall not be fractured in the voltage resistance test in 6. Minimum abrasion resistance shall be as specified in Table 9. Minimum number of abrasion cycles shall be as specified in Table Maximum shrinkage length on the both ends shall be 2 mm after being heated as specified.

The conductor shall not be exposed in the winding test in 6. The identification mark shall be readable after the specified test. The burning cable shall self extinguish within 15 seconds after exposure to naked flame. Test method detail item 6. Maximum shrinkage length on both ends shall be 2 mm after being heated as specified. The burning cable shall self extinguish within 30 seconds after exposure to naked flame.

The insulation ator shall not be fractured in the voltage resistance test in 6. The insulation shall neither crack nor melt after being heated. When the rate of outside diameter changer is measured after the specified test and subsequently the winding test in 6. Note 2: This test is applicable to the nominal sizes of 5 or less. Nominal size 0. Construction and material 5. The construction shall conform to the applicable standard in Tables 11 to 25 when the test is conducted according to Item 6.

Conductor Number of Calculated Nominal Approx. Standard Max. Standard mm 3. Conductor Calculated Nominal Number of Approx. Conductor Calculated Nominal Approx. Standard mm 4. Number of m? Standard Min. Conductor Calculated Approx. However, the conductor material for nominal size 0. When marking is applied on the cable surface to identify the type and nominal size of a cable, it shall not be easily erasable.

Tests 6. However, gasoline, diesel fuel, and engine oil must be always tested. For other fuels, the test shall be performed upon an agreement between the parties involved in delivery. Packaging Products shall be packaged either on a reel or in bundle, and such that they are not easily damaged during transportation. Product designation Product designation is based on the applicable standard name, type, nominal size, and colour, or by means of symbol, nominal size, and colour code.

Example: Thin wall low-voltage cables "type 1" for automobiles 0. Marking The following items shall be marked on the packaged products using indelible ink. Outline and background of revision 1. At the time of establishment, thin wall low-voltage cables generally called AVS that have thinner insulation covering and thin wires with a conductor sectional area of 5 mm2 or less were widely used to reduce the weight and size of wire harnesses for automobiles.

In , the standard was revised to include these cables. After study by the Electrical and Electronic Equipment Subcommittee and the Standardization Board, the revision was approved and determined at the standardization meeting in March Issues arising during study 2. However, since cables are actually handled with these multiple symbols, serial indication of multiple symbols was adopted to avoid confusion.

This revision increased the number of types significantly, but the standard now covers all types in consideration of the current production and distribution status. These types and symbols must be organized and integrated in accordance with ISO standards in order to increase international competitiveness in the future.

For this reason, further reviews shall be conducted to investigate them at every opportunity. Therefore, cables of different classes cannot be integrated simply as a single type, and are used separately. For this reason, the current details are applied unchanged.

The idea was not adopted because those indications are not made worldwide and because of a problem related to manufacturing equipment difficulty of application to extremely thin cables. Another idea was proposed that the rated voltage should be indicated on the cable packaging for manufacturers that use the cables for electric devices in EVs and HEVs, but it was also not adopted because of the cost and time required for such indication.

In addition, indication of rated voltage is not specified in ISO The situations are described below. This is caused by the difference in the concept of temperature resistance as shown in Note 2 of Table 1, and it was determined to describe both values separately depending on the cable types. Among the heat resistance tests of the ISO standard, the short-term test and overload test were not adopted. Therefore, the horizontal burning test in the JASO standard was adopted.

Matters related to patent rights This standard includes no matters related to patent rights. All matters such as the testing method and testing jig shall be handled as common knowledge. Scope All previous automotive low-voltage cable standards JIS C established in , which was the first standard for this subject in Japan, JASO D established in in which the insulation covering was made thinner, and D established in were created without concern about the rated voltage of the cables because the cables were applied to automotive electric systems with the international standard of 12 V and 24 V, and have been used continuously.

Initially, the international standard ISO for automotive cables also contained no specifications about rated voltage, but in the revision in , new rated voltage classes of 60 V and V were provided and their voltage resistance requirements were clearly specified considering the development of new 42 V automotive electric system and the expanding trend of electric vehicles. Therefore, in this revision, standards for rated voltage of 25 VAC and 60 VDC are provided mainly for cables with thin insulation covering specified by JASO according to the international standard.

In addition, this standard does not specify indication of the rated voltage on the cable itself or packaging. To check the rated voltage, refer to the "name or symbol and nominal size" indicated on the cable, cable frame, or bundle. Details of specified items in specified elements 5. The English name was also changed from "Low-tension cables with thin wall insulation for automobiles" to "Unscreened low-voltage cable.

The types and symbols are summarized and described in Table 1. Added cable types? The tests requiring different performance depending on the nominal size are described in Table 8 to Therefore, no wire diameter is specified in the construction table and only "circular compression" is described. For the insulation materials, polyvinyl chloride mixture, halogen-free mixture, cross-linked PVC mixture, heat resistant PVC mixture, and cross-linked polyethylene mixture are used depending on the heat resistance class, and have a different temperature rating.

Therefore, all materials are described in Table 1. Matters of concern This revision tried to adopt all test items specified in ISO , but six items could not be included. Their adoption must be considered in a future revision. Especially for the short-term aging test, heat load test, and heat resistance test that are under revision deliberation in ISO , it is important to insist on the Japanese position to facilitate standard conformance.

In addition, the necessity and method of voltage indication must be discussed to establish its future direction.

In addition, some nominal sizes include "f", and the note "The symbol 'f' in the 'Nominal size' column means Explanatory notes 2 The organization and integration of types and symbols require the understanding and cooperation of many relevant people, and a temporary increase in the types and symbols in These shall be organized and integrated at the next regular review of the 0.

However, the use of "f" is neither consistent nor clear. This shall be organized at the next regular review of the standard. Explanatory notes 2.


JASO D 608 standard AEX 5mm2 automotive wire electrical cable



JASO D 608


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