AS 4177.5-2004 pdf free.Caravan and light trailer towing components – Part 5: Electrical connectors.
This Standard specifies requirements for the compatibility and performance of electrical connectors for making detachable electrical connections between motor vehicles and trailers fitted with electrical equipment normally operating at a nominal d.c. voltage of 6 V, 12 V or
24V.
The method of testing the performance is given in Appendix A and dimensions and assemblies for 7-pin socket and plug. and I2-pin socket and plug are given in Appendix B.
2 REFERENCED DOCUMENTS
The following documents are referred to in this Standard:
AS
2331 Methods of test for metallic and related coatings
2331.3.1 Part 3.1: Corrosion and related property tests—Neutral salt spray (NSS) test
3 DEFINITIONS
For the purpose of this Standard, the Following definitions apply.
3.1 Connector
A two-part device intended for making a detachable connection (electrical) between a motor vehicle and trailer.
3.2 Contact
The mating components of a connector through which the electrical connection between plug and socket is made.
3.3 Motor vehicle
A self-propelled vehicle used on a public road.
3.4 Plug
The part of a connector that is normally attached by flexible cable to the trailer.
3.5 Shall
Indicates that a statement is mandatory.
3.6 Should
Indicates a recommendation.
3.7 Socket
The part of a connector that is normally fixed to the rear of the motor vehicle.
4 MATERIALS
4.1 Electric current-carrying parts
All electric-current-carrying parts shall be made of brass, bronze or other suitable copper
alloy, or plated for corrosion resistance.
4.2 Body parts
Materials for body parts shall he in accordance with Clause 6 and shall—
(a) have adequate strength and adequate temperature stability to withstand normal usage:
(b) have appropriate insulating properties where required: and
(c) (I) where metallic, be corrosion-resistant or adequately protected against
corrosion: or
(ii) where non-metallic, be not adversely affected by exposure to air, sunlight, or petroleum products.
5 DESIGN AND CONSTRUCTION
5.1 General
The dimensions and assemblies for 7-pin socket and plug and 12-pin socket and plug shall be as given in Appendix B.
5.2 Circuits and identification
The functions of the contacts shall be as specified in Table I. Each contact shall be as specified in Table I and each contact shall be identified by the appropriate contact number given in Table 1. The numbers shall be legibly and permanently marked in numerals not less than 2 mm high on both the plug and the socket adjacent to each terminal, as appropriate.
NOTE: Conductors should be coloured in or on the insulation with the colours given in Table I for each circuit and contact number.
5.3 Contacts
Contacts shall be of’ the pin and tube type. The diameters of’ the pin and tube shall be such that will permit them to be connected with a moderate push in accordance with Clause 6 and also ensure a good electrical contact. Split elements shall have the ability to spring back to their original diameter after disengagement t’rom their mating element.