BSI 22/30422037 DC 2022

$24.66

BS 1363-3. 13 A plugs, socket-outlets, adaptors and connection units – Part 3. Adaptors. Specification

Published By	Publication Date	Number of Pages
BSI	2022	101

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Categories: 29.120.30 - Plugs, socket-outlets, couplers, BSI

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1	30422037.PDF
3	30422037 -.pdf
4	1 Scope
5	2 Normative references
6	3 Terms and definitions 3.1 accessible external surface of an adaptor 3.2 actuating member 3.3 adaptor 3.4 adaptor plug 3.5 adaptor socket-outlet 3.6 basic insulation 3.7 calibrated link 3.8 class I
7	3.9 class II 3.10 clearance 3.11 creepage distance 3.12 engagement surface of the plug portion of an adaptor 3.13 engagement surface of the socket-outlet portion of an adaptor 3.14 fine wire thermocouple 3.15 functional insulation 3.16 fuse carrier 3.17 fused adaptor 3.18 indicator lamp (pilot lamp)
8	3.19 insignificant mass 3.20 insulated shutter opening device (ISOD) 3.21 intermediate adaptor 3.22 live parts 3.23 multiway adaptor 3.24 non-rewirable adaptor 3.25 reinforced insulation 3.26 resilient material 3.27 rewirable adaptor 3.28 screw type terminal 3.29 shaver adaptor
9	3.30 shutter 3.31 small parts 3.32 supplementary insulation 3.33 switched adaptor 3.34 terminal 3.35 termination 3.36 type test 3.37 type test sample 4 Conditions of use
10	5 General 6 General conditions for type testing 6.1 All tests shall be type tests.
11	6.2 All inspections and tests, of any one classification (see Clause 7), shall be carried out as specified in the clauses listed in Table 1 on the number of samples in the sample column and in the order given 6.3 Gauges in accordance with Figure 5, Figure 11, Figure 12, Figure 14, Figure 16 and Figure 16b) shall be considered to conform to the dimensional requirements if the measured values are within the specified dimensions and the uncertainty of measure…
16	7 Classification and rating 7.1 Classifications 7.2 Rating
17	8 Marking and labelling 8.1 Adaptors shall be legibly and durably marked with the following information, which shall not be placed on screws, removable washers or other easily removable parts, or upon parts intended for separate sale: 8.1.1 Conformity shall be checked by inspection and by rubbing the marking for approximately 15 s with a cloth soaked in water, and again for approximately 15 s with a cloth soaked in an aliphatic solvent hexane with a content of aromatics of maximum …
18	8.2 Rewirable intermediate adaptors and adaptor plugs shall have a removable tag or label indicating the rating of the fuse link fitted, e.g. “Fitted with X ampere fuse” (where X denotes the rating of the fuse link). 8.2.1 Conformity shall be checked by inspection. 8.3 Except where an intermediate adaptor or adaptor plug fitted with a flexible cable is supplied direct to a manufacturer for incorporation in other equipment, the free end of such an assembly shall have label attached which shall include the following: 8.3.1 Conformity shall be checked by inspection. 8.4 Rewirable adaptors and adaptor plugs shall be provided with adequate instructions for the safe connection of the appropriate flexible cables including clear instructions for the removal of insulation from the conductors. 8.4.1 Conformity shall be checked by inspection.
19	8.5 Symbols shall be as follows:
20	9 Clearances, creepage distances and solid insulation 9.1 Clearances 9.1.1 Clearances for basic insulation 9.1.2 Clearances for functional insulation
21	9.1.3 Clearances for supplementary insulation 9.1.4 Clearances for reinforced insulation 9.1.5 Contact gap 9.2 Creepage distances
22	9.2.1 Creepage distances for basic insulation 9.2.2 Creepage distances for functional insulation 9.2.3 Creepage distances for supplementary insulation 9.2.4 Creepage distances for reinforced insulation 9.3 Solid insulation 9.3.1 Conformity shall be checked by tests in accordance with 16.1.3 using the values given in Table 5.
23	9.4 Requirements for printed wiring boards and equivalent construction 10 Accessibility of live parts 10.1 Live parts of adaptors shall not be accessible when wired as in use and in full engagement in a corresponding socket-outlet. Removal of detachable fuse carriers shall not result in live parts becoming accessible when the adaptor is in full engage… 10.1.1 Conformity shall be checked by the application of test probe 12 of BS EN 61032:1998 applied with a force of N with non-rewirable adaptors fitted with their appropriate flexible cables, rewirable intermediate adaptors fitted with a 2 core flexi… 10.2 Adaptors shall be so designed that when they are mounted and wired as in normal use live parts are not accessible. 10.2.1 Conformity shall be checked by the application of the test pin shown in Figure 1 perpendicular to the accessible external surface of the adaptor with a force of N. It shall not be possible to touch live parts.
24	10.3 The plug portion of an adaptor shall be designed and constructed so as to protect the user against accidental contact with live parts during insertion or withdrawal from corresponding socket-outlets. The socket-outlets of an adaptor shall be desi… 10.3.1 Conformity shall be verified by satisfying the dimensional and gauging requirements of this part of BS 1363. 10.4 Resilient covers of adaptors shall be so designed and constructed that when assembled and wired as in normal use, there is no risk that, as a result of undue pressure, live parts could penetrate the cover or become so disposed as to reduced creep… 10.4.1 Conformity shall be checked by the following test (an example of a suitable apparatus is shown in Figure 2a).
25	10.5 Except for assemblies supplied to equipment manufacturers for incorporation into their equipment, an intermediate adaptor or adaptor plug supplied fitted with a flexible cable shall have the free end of such an assembly encapsulated in insulating… 10.5.1 Conformity shall be checked by inspection.
26	10.6 It shall not be possible to introduce a conducting device through the earthing socket aperture(s) of an adaptor in such a manner that there is a risk of making contact with live parts, or a live conductor with or without insulation. 10.6.1 Conformity shall be checked by introducing a rigid metal pin, mm diameter × 60 mm ±1 mm long, through any earthing socket aperture or apertures of a socket-outlet of an adaptor mounted as in normal use, applying a force of N, and with the con… 11 Provision for earthing 11.1 Adaptors shall be so constructed that, when inserting a plug with an earthing pin into a corresponding socket-outlet of an adaptor the earth connection is made before the current carrying pins of the plug become live. When withdrawing a plug the … 11.1.1 Conformity shall be checked by inspection and electrical test. 11.2 All accessible metal parts of adaptors shall be in effective electrical contact with the earthing socket-contact and earthing plug pin, except that metal parts on or screws in or through, non-conducting material, and separated by such material fr… 11.2.1 Conformity shall be checked by inspection, and the following: 12 Terminals and terminations of intermediate adaptors and adaptor plugs 12.1 Terminals and terminations shall provide for effective clamping and securing of conductors connected to them, so that efficient electrical connection is made. 12.1.1 Conformity shall be checked in accordance with 12.2 to 12.9. 12.2 Rewirable adaptors shall be provided with terminals as defined in 3.12 or 3.13.
27	12.2.1 Conformity shall be checked by inspection. 12.3 Non-rewirable adaptors shall be provided with soldered, welded, crimped or similar terminations. For all these methods of termination, not more than one strand of a 0.5 mm2 conductor or two strands of other sized conductors shall be fractured dur… 12.3.1 Conformity shall be checked by inspection and measurement. 12.4 Terminals in rewirable adaptors shall permit the connection, without special preparation, of flexible cables having nominal conductor cross-sectional areas of 0.5 mm2 to 1.5 mm2. 12.4.1 Conformity shall be checked by inspection and fitting the appropriate conductors. 12.5 Where pillar terminals are used they shall have clamping screws of sufficient length to extend to the far side of the conductor hole. The end of the screw shall be slightly rounded so as to minimize damage to the conductors. The sizes of the cond… 12.5.1 Conformity shall be checked by inspection and measurement. 12.6 Terminal screws shall have a declared outside diameter of not less than 3 mm or be not smaller than 6 B.A. 12.6.1 Conformity shall be checked by inspection and measurement. 12.7 Insulating barriers in intermediate adaptors or adaptor plugs shall be an integral part, so arranged that with the cable anchorage rendered inoperative and the earth or line conductors becoming detached from their respective terminals, there is n… 12.7.1 Conformity shall be checked by inspection and, except for non-rewirable adaptors, by the following test.
28	12.8 Intermediate adaptors or adaptor plugs shall be designed so that they can be wired in a manner which prevents strain to the earth connection before the line and/or neutral connection when the cable anchorage is rendered inoperative. 12.8.1 Conformity shall be checked by inspection and manipulation using an intermediate adaptor or adaptor plug wired in accordance with the manufacturer’s instructions. 12.9 Terminals of intermediate adaptors or adaptor plugs shall be so located or shielded that if a strand of a flexible conductor escapes when the conductors are fitted, there is negligible risk of accidental connection between live parts and accessib… 12.9.1 Conformity shall be checked by inspection, and by the following test.
29	13 Construction of adaptors (plug portion) 13.1 The disposition of the adaptor plug pins (including ISODs where applicable) shall be as shown in Figure 4a).
30	13.1.1 Conformity shall be checked by inspection. 13.2 The outline of the adaptor shall not exceed the dimensions shown in Figure 4a for a distance of not less than 6.35 mm from the engagement surface and within these dimensions there shall be no axial projection from the engagement surface of the ad…
33	13.2.1 Conformity shall be checked by inspection, measurement and by the use of the gauge shown in Figure 5. 13.3 No part of a line or neutral pin shall be less than 9.5 mm from the periphery of the adaptor measured along the engagement surface. 13.3.1 Conformity shall be checked by measurement. 13.4 The provision of fuses in adaptors shall be in accordance with the following.
34	13.4.1 Conformity shall be checked by inspection. 13.5 In non-rewirable intermediate adaptors and adaptor plugs, where the fuse link is retained by means of a fuse carrier, this device shall be either: 13.5.1 Conformity shall be checked by inspection. 13.6 For fused adaptors with the fuse carrier or cover removed and the fuse link correctly fitted in the fuse clips, the creepage and clearance distances between live parts of the fuse and clips and the engagement face of the adaptor shall meet the re… 13.6.1 Conformity shall be checked by measurement. 13.7 The base and cover of non-rewireable intermediate adaptors and adaptor plugs shall be permanently attached to each other, such that the flexible cable cannot be separated without making the portable socket-outlet permanently useless. 13.7.1 Conformity shall be checked by inspection and for non moulded on non-rewirable intermediate adaptors and adaptor plugs by the test given in 13.11.1. 13.8 The base and cover of rewirable intermediate adaptors and adaptor plugs having the cover fixed by screws shall be firmly secured to each other. It shall not be possible to remove the cover unless the adaptor is completely withdrawn from the socke… 13.8.1 Conformity shall be checked by inspection and by the following test.
35	13.9 The base and cover of adaptors other than those described in 13.7 and 13.9 shall be firmly secured to each other. It shall not be possible to remove the cover unless the adaptor is completely withdrawn from the socket-outlet. 13.9.1 Conformity shall be checked by inspection and the following test. 13.9.2 Non moulded on, non-rewirable adaptors are tested with the flexible cable supplied. The adaptor plug pins are clamped in the vertical position using a suitable jig with the plug pins uppermost. The plug flexible cable shall be 1 m in length and…
36	13.10 Adaptors shall be so designed and constructed that they cannot readily be deformed to allow access to live parts. 13.10.1 Conformity shall be checked by inspection and by the following test. 13.11 For non-rewirable intermediate adaptors and adaptor plugs means shall be provided to prevent loose strands of a conductor or current carrying parts from reducing the minimum insulation requirements between such parts and all external surfaces of… 13.11.1 Conformity shall be checked by inspection and by the test described in 15.2. 13.12 Materials other than brass (having a minimum content of 58% copper) shall not be used in the construction of line and neutral adaptor plug pins except for sleeves of pins as specified in 13.19. Adaptor plug pins and ISODs shall conform to 13.13…. 13.12.1 All exposed surfaces of the adaptor plug pins shall be smooth and free from burrs or sharp edges and other irregularities which could cause damage or excessive wear to corresponding socket contacts or shutters. 13.12.1.1 Conformity shall be checked by inspection. 13.12.2 Those surfaces of the non-solid adaptor plug pins which are visible when the adaptor is correctly assembled shall be free of apertures. 13.12.2.1 Conformity shall be checked by inspection. 13.12.3 All seams and joints of non-solid adaptor plug pins shall be closed over their entire length. 13.12.3.1 Conformity shall be checked by inspection and in case of doubt by the following test. 13.12.4 Adaptor plug pins and ISODs shall have adequate strength to withstand the stresses of normal use. 13.12.4.1 For solid pins conformity shall be checked by the following test.
38	13.12.4.2 For non-solid pins, conformity shall be checked by the following tests. 13.12.4.3 For ISODs, conformity shall be checked by the following test.
39	13.12.5 Adaptors with non-solid pins and/or ISODs shall not cause excessive wear to socket contacts or shutters of socket-outlets in accordance with BS 1363-2:2023. For adaptors with non-solid pins, conformity shall be checked by 13.13.5.1. For adapto… 13.12.5.1 Conformity shall be checked by the following tests. 13.12.5.2 Conformity shall be checked by the following.
40	13.12.6 Adaptor plug pins and ISODs (if any) shall have adequate mechanical strength to ensure that they cannot be distorted by twisting. 13.12.6.1 Conformity shall be checked by inspection and by the following test.
41	13.13 The socket contacts and any terminals or terminations shall be formed as one piece with or shall be permanently connected to the pin in such a way that efficient electrical connection is made that cannot work loose in use. This connection shall … 13.13.1 Conformity shall be checked by inspection and the tests described in 21.1.5 and Clause 17. 13.14 Adaptors shall be so designed that when fully assembled the pins are adequately retained in position such that there is no likelihood of them becoming detached from the adaptor during normal use. 13.14.1 Conformity shall be checked by the following test.
42	13.15 The degree of flexibility of mounting of the adaptor plug pins or the angular movement of the pins in the base shall be not greater than 3 30′ in the directions shown in Figure 8 from an axis which is perpendicular to the plug engagement surfac…
43	13.15.1 Conformity shall be checked by inspection and in case of doubt by the following test.
44	13.16 Suitable means shall be provided for withdrawing the intermediate adaptor or adaptor plug without subjecting the flexible cable to stress. 13.16.1 Conformity shall be checked by inspection. 13.17 Non-rewirable intermediate adaptors and adaptor plugs shall be fitted with flexible cables in accordance with 20.4. 13.17.1 Conformity shall be checked by inspection. 13.18 Conductive component parts of adaptors shall be so located and separated that, in normal use, they cannot be displaced so as to affect adversely the safety or proper operation of the adaptor. 13.18.1 Conformity shall be checked by inspection and manual manipulations. 13.19 Line and neutral adaptor plug pins shall be fitted with insulating sleeves. The dimensions of the pin and sleeve shall fall within those given in Figure 4a) and Figure 4b). Sleeves shall not be fitted to any earthing adaptor plug pin. 13.19.1 Conformity shall be checked by inspection and by measurement for pin and sleeve and use of the gauge shown in Figure 5 as described in 13.2.1 for socket-outlet compatibility. 13.20 Adaptor plug pin sleeves shall have adequate electric strength, resistance to abrasion and resistance to deformation due to overheating of pins. 13.20.1 Conformity shall be checked by the tests given in 13.21.2, 13.21.3 and 13.21.4. 13.20.2 A 50 Hz voltage of substantially sinusoidal waveform is applied between each L and N pin and a thin metal strip of between 5.5 mm and 6 mm width wrapped around the base of the adaptor plug pin sleeve adjacent to the base of the adaptor. Initia… 13.20.3 The test apparatus for resistance to abrasion (see Figure 9) comprises a horizontally disposed beam pivoted about its centre point. A short length of steel wire, 1 mm ±0.02 mm in diameter and bent into a “U” shape, the base of the “U” being st…
45	13.20.4 A set of three sample pins are tested by means of the apparatus shown in Figure 10 which has a blade mm wide and a radius of 3 mm ±0.1 mm. The test is made on one pin of each adaptor not used for the test described in 13.20.3.
46	14 Construction of adaptors (adaptor socket-outlet portion) 14.1 For adaptors with adaptor socket-outlets for BS 1363 plugs, the disposition of the socket contacts shall be as shown in Figure 3.
47	14.1.1 Conformity shall be checked by inspection and the use of the gauge shown in Figure 11. 14.2 For adaptors with adaptor socket-outlets for BS 1363 plugs the line and neutral socket contacts in adaptors shall be positioned so as to make satisfactory contact with the corresponding pins of a plug in all positions that the contact might occup… 14.2.1 Conformity shall be checked by inspection and the use of the gauge shown in Figure 12 and the circuit shown in Figure 13. Both indicator lamps shall light.
48	14.3 For adaptors with adaptor socket-outlets for BS 1363 plugs, on insertion of a plug into an adaptor, the travel of the end of either current carrying pin from the front face of the adaptor to the first point of contact with the appropriate socket … 14.3.1 Conformity shall be checked by inspection and the use of the gauge shown in Figure 4 and the circuit shown in Figure 13. Neither indicator shall light. 14.4 For adaptor socket-outlets intended to accept plugs conforming to other standards, the disposition and dimensions shall enable reliable and safe interconnection and there shall be no projection on the engagement surface of the adaptor such as wou… 14.4.1 Conformity shall be checked by inspection and measurement and the requirements in the appropriate standards.
49	14.5 Socket contacts of adaptors shall be self-adjusting as to contact making and each socket contact shall be such as to make and maintain, in normal use, effective electrical and mechanical contact with a corresponding plug pin. The means for produc… 14.5.1 Conformity shall be checked by inspection and, except for shaver adaptors, by the tests given in 13.5.2 and 13.5.3, as appropriate. 14.5.2 The voltage drop between any individual line or neutral socket contact and the corresponding plug pin is measured between the terminal connecting strap at a point immediately adjacent to the socket contact and the corresponding plug pin. Other … 14.5.3 For adaptor socket-outlets for BS 1363 plugs, the withdrawal pull of a gauge as shown in Figure 16a) for individual earth socket contacts and in Figure 16b) for individual line or neutral socket contacts is checked whilst ensuring that neither …
50	14.6 The construction of adaptors shall be such as to allow for easy withdrawal of a plug from the socket-outlets. 14.6.1 Conformity shall be checked by the following test. 14.7 The construction of the adaptor shall be such that when a plug is withdrawn from it the current carrying socket contacts are automatically screened by shutters. The shutter shall be operated either by the insertion of the earthing pin or by the s… 14.7.1 Conformity shall be checked by inspection, before and after the test described in Clause 19, and by the application of the corresponding single pin applied to the shutter using a force of N. The test pin shown in Figure 1 is then applied to th… 14.7.2 Earth pin operated shutters and 3-pin operated shutters shall be deemed to conform to this requirement without testing. For other shutter designs, conformity shall be checked by the following test. 14.8 For adaptors with adaptor socket-outlets for BS 1363 plugs, apertures for the reception of the line and the neutral plug pins shall not exceed 7.2 mm × 4.8 mm and for the earthing pin 8.8 mm × 4.8 mm.
51	14.8.1 Conformity shall be checked by inspection and measurement. 14.9 For adaptors with adaptor socket-outlets for BS 1363 plugs, no part of the aperture intended for the reception of the line or neutral pin shall be less than 9.5 mm from the periphery of the accessible external surface of a socket-outlet except th… 14.9.1 Conformity shall be checked by inspection and measurement. 14.10 Adaptors with associated plugs and cables shall not impose undue strains on fixed socket-outlets. 14.10.1 Except for shaver adaptors, conformity shall be checked by the following tests.
54	14.10.2 Adaptors with socket-outlets on the same plane shall have a maximum of two outlets. The outlets shall be on the horizonal plane only, and shall be on the same centreline as the plug-pins of the adaptor. The vertical centre of the outlets shall…
55	14.11 Adaptor socket-outlet contacts shall withstand the strain imposed on them by associated plugs and cables. 14.11.1 Conformity shall be checked for adaptor socket-outlets for plugs conforming to BS 546:1950 and BS 1363 by the following test, except for shaver adaptors and adaptor socket-outlets for plugs conforming to BS 546:1950 of 2 A rating. 14.12 Switches shall be so constructed that undue arcing cannot occur when the switch is operated slowly. The switch shall disconnect at least the line circuit. Double pole switches shall make and break each pole with one movement of the actuator. 14.12.1 Conformity shall be checked by inspection and by the following test. 14.12.2 The actuating member of a switch at rest shall take up a position corresponding to that of the moving contacts except those having a single push-button where the actuating member might take up a single rest position. The actuating mechanism sh… 14.12.2.1 Conformity shall be checked by inspection and by the test of 13.12.3. 14.12.3 The necessary force F to switch off shall first be measured and the force shall be applied to the extremity of the actuating member.
56	14.13 Electronic components incorporated in adaptors shall conform to Annex A. 14.13.1 Conformity shall be checked by inspection of component conformity evidence and the tests of Annex A. 15 Resistance to ageing and to humidity 15.1 Resistance to ageing 15.1.1 Conformity shall be checked by the following test. 15.2 Resistance to humidity
57	15.2.1 Conformity shall be checked by the humidity treatment described below followed within 20 min by the measurement of the insulation resistance and by the electric strength test specified in Clause 16. 16 Insulation resistance and electric strength 16.1 The insulation resistance and electric strength of adaptors shall be adequate. 16.1.1 Conformity shall be checked by the tests given in 16.1.2 and 16.1.3. 16.1.2 The insulation resistance is measured using a d.c. voltage of V, the measurement being made for s after application of the voltage. The insulation resistance is measured consecutively between:
58	16.1.3 A 50 Hz voltage of substantially sinusoidal waveform is applied as described in 16.1.2. Initially, not more than 1 000 V is applied, the voltage is then raised to 2 000 V ±60 V. The high voltage source used shall be such that when the output is… 16.2 Non-rewirable intermediate adaptors or adaptor plugs shall withstand a high voltage test, for which the test voltage shall be alternating (50 Hz to 60 Hz), applied between all current carrying parts connected together and a conducting electrode i… 17 Temperature rise 17.1 Adaptors and their surroundings shall not attain excessive temperatures in normal use. 17.1.1 Conformity shall be checked by the following tests.
59	17.1.2 Tests shall be carried out as follows.
64	18 Breaking capacity of adaptors 18.1 The breaking capacity of socket contacts and switches incorporated in adaptors shall be adequate. 18.1.1 Except for shaver adaptors, conformity shall be checked by the tests described in 18.1.2 and 18.1.3 as applicable, which shall be completed with the adaptors connected and mounted as in normal use. 18.1.2 The socket contacts shall make and break a current of 1.25 times rated current ±0.4 A, i.e. (1.25 × 13) A ±0.4 A in a substantially non-inductive a.c. circuit at 250 V ±5 V, ten times in succession at intervals of approximately 30 s, a plug bei… 18.1.3 The switch shall make and break a current of 1.25 times rated current ±0.4 A in a substantially non-inductive a.c. circuit of 275 V ±5 V, ten times in succession at intervals of approximately 30 s. After the test, the adaptor shall be capable o… 19 Normal operation of adaptors 19.1 Adaptors shall withstand without excessive wear or other harmful effects, the electrical and mechanical stresses occurring in use. 19.1.1 For adaptors other than shaver adaptors, conformity shall be checked by the tests described in 19.1.2 and 19.1.4 and for shaver adaptors by the tests described in 19.1.3. 19.1.2 Using an appropriate plug with solid pins, each socket-outlet of the adaptor shall make and break a current equal to the rated current ±0.4 A of the adaptor, or if the rated current ±0.4 A of the plug is lower, the rated current of the appropri… 19.1.3 Shaver adaptors shall be tested without making and breaking a current, i.e. purely mechanical test.
65	19.1.4 In switched adaptors the voltage drop across each switched pole, measured at points immediately adjacent to the switch, shall not exceed 60 mV at rated current. 20 Connection of flexible cables and cable anchorage in intermediate adaptors and adaptor plugs 20.1 Provision shall be made for the entry and effective clamping without bending of 2 core and 3-core flexible cables for rewirable adaptors as given in BS EN 50525-2-11:2011, BS EN 50525-2-21:2011, BS EN 50525-2-22:2011 and BS EN 50525-2-71:2011, ha… 20.1.1 Conformity shall be checked by inspection and by the following tests.
66	20.2 Cable anchorage in rewirable adaptors shall anchor the cable securely to the adaptor. The design shall ensure the following: 20.2.1 Conformity shall be checked by inspection and test. 20.3 Screws which are used when clamping the flexible cable shall not serve to fix any other components unless the adaptor is rendered manifestly incomplete if the component is omitted or is replaced in an incorrect position, or the component intended… 20.3.1 Conformity shall be checked by inspection.
67	20.4 Non-rewirable adaptors shall be fitted with flexible cables conforming to the relevant parts of BS EN 50525 or with flexible cables conforming to the requirements of the specification appropriate to the equipment to which they might be fitted. Co… 20.4.1 Conformity shall be checked by inspection and a continuity test. 20.5 Non-rewirable adaptors shall be so designed that the flexible cable is not subjected to excessive bending where it enters the adaptor. 20.5.1 Conformity shall be checked by the following test using an apparatus similar to that shown in Figure 18. The adaptor is fixed to the oscillating member of the apparatus so that when this is vertical the axis of the flexible cable at the point o…
69	20.6 The cable entry to rewirable adaptors shall be so shaped as to prevent damage to the cable. 20.6.1 Conformity shall be checked by inspection. 21 Mechanical strength 21.1 Adaptors shall have adequate mechanical strength and be so constructed as to withstand such handling as expected in normal use. 21.1.1 Conformity shall be checked for the following:
70	21.1.2 For fused adaptors using fuse links conforming to BS 1362:1973+A3:2021, a solid link of stainless steel as shown in Figure 19 is inserted and withdrawn from the fuse clips of a fused adaptor 20 times in succession in a normal manner, at a rate … 21.1.3 For fused adaptors using fuse links conforming to BS 646:1958+A2:2013, a solid link of stainless steel as shown in Figure 38 is inserted and withdrawn from the fuse clips of the fused adaptor twenty times in succession in a normal manner, at a …
71	21.1.4 Adaptors are tested with the impact test apparatus shown in Figure 21a) when mounted in a socket-outlet. The pendulum consists of a steel tube with an external diameter of 9 mm and a wall thickness of 0.5 mm, suspended in such a way that it swi…
74	21.1.5 Adaptors are tested in the tumbling barrel shown in Figure 20. The barrel is turned at a rate of approximately 5 r/min (approximately ten drops per minute). Only one adaptor is tested at a time. The number of drops shall be 25. Rewirable interm…
75	22 Screws, current carrying parts and connections 22.1 Screwed connections, electrical and otherwise, shall withstand the mechanical stresses occurring in normal use. Screws directly transmitting electrical contact pressure shall screw into metal. Screws shall not be of metal which is soft and liable… 22.1.1 Conformity shall be checked by inspection and, for screws and nuts which are intended to be tightened during installation or use, or during replacement of the fuse link, by the following test.
76	22.2 Thread cutting and/or thread forming screws shall not be used for the making of current carrying or earth continuity connections. 22.2.1 Conformity shall be checked by inspection and by manual test. 22.3 Current carrying parts, earthing plug pins and earthing contacts shall be of brass (having a minimum content of 58 % copper), copper, phosphor bronze or other metal at least equivalent with regard to its conductivity, resistance to abrasion and r… 22.3.1 Conformity shall be checked by inspection and by the relevant tests described in 11.2, Clause 17 and Clause 25. 23 Resistance to heat 23.1 Adaptors shall be resistant to heat. 23.1.1 Conformity shall be checked by the test given in 23.1.2 or 23.1.3. 23.1.2 Adaptor samples are kept for min in a heating cabinet maintained at 70 C ±5 C. 23.1.3 Adaptors with external parts of resilient material, e.g. thermoplastics, rubber, are subjected to a pressure test by means of an apparatus similar to that shown in Figure 23, the test being made in a heating cabinet at a temperature of 70 C ±5…
78	23.2 Parts of insulating material shall be sufficiently resistance to heat having particular regard for their location and function in the complete adaptor. 23.2.1 Conformity shall be checked as follows: 24 Resistance to abnormal heat and fire 24.1 General 24.1.1 Conformity shall be checked by the test described in 24.2. 24.2 Glow wire test
79	25 Resistance to excessive residual stresses and to rusting 25.1 Press formed or similar current carrying parts of copper alloy containing less than 80% of copper shall be resistant to failure in use due to stress corrosion. 25.1.1 Conformity shall be checked by the following test. 25.2 Ferrous parts, the rusting of which might cause the adaptor to become unsafe, shall be adequately protected against rusting. 25.2.1 Conformity shall be checked by the following test.
80	26 (Not used) 27 Overload tests 27.1 Adaptors rated at 13 A shall withstand current which could occur due to overload without creating a risk of contact with live parts. 27.1.1 Conformity is checked by the tests given in 27.1.2 to 27.1.4. The test arrangement shall be as described in 16.1 except no thermocouples or pin spacers shall be used and the test conducted at any voltage between 12 V and 250 V. 27.1.2 Fused adaptors shall be fitted with a 13 A fuse to BS 1362:1973+A3:2021 and subjected to a test current of 1.6 times the rating of the fitted fuse for 60 min or until the fuse operates (if less than 60 min). Immediately afterwards the checks sp… 27.1.3 Unfused adaptors shall be subjected to a test current of 1.6 times the rating of the adaptor for 60 min. Immediately afterwards the checks specified in 27.1.4 shall be made. Unfused adaptors shall then be subjected to a test current of 1.9 time… 27.1.4 Each adaptor shall be checked for conformity with 10.1, 13.7.1, 13.8.1 and 13.13.1 except that the tests shall be performed at ambient temperature. Deterioration which does not compromise access to live parts (e.g. discolouration, distortion) s… Annex A Requirements for incorporated electronic components A.1 General
81	A.2 Electromagnetic compatibility (EMC) requirements A.3 USB circuits intended for charging portable devices A.3.1 General A.3.1.1 Power rating and identification markings A.3.2 Overcurrent and earth fault protection in primary circuits
82	A.3.2.1 Number and location of protective devices A.3.2.2 Electrical insulation A.3.2.3 Clearances, creepage distances and distances through insulation A.3.3 Disconnection from the mains supply A.3.4 Mechanical strength A.3.4.1 Reducing the risk of ignition and spread of flame A.3.5 Abnormal conditions
83	A.3.6 Conformity A.4 Surge protective devices A.4.1 General
84	A.4.2 Requirements A.4.3 Conformity A.4.4 Incorporation of VDRs in adaptors
85	A.4.5 Conformity A.5 Electronic switches A.5.1 General A.5.2 Conformity
86	Annex B Pollution degree
87	Annex C Relation between rated impulse withstand voltage, rated voltage and Overvoltage Category Annex D (normative) Determination of the Comparative Tracking Index (CTI) and Proof Tracking Index (PTI)
88	Annex E Impulse voltage test
89	Annex F Measurement of clearances and creepage distances
95	Annex G Test plug for temperature rise test G.1 General
96	G.2 Calibration Annex H The construction and calibration of a calibrated link H.1 Construction
98	H.2 Calibration

Additional information

Status	Definitive
Pages	101
Publication Date	2022-10-03
Standard Number	22/30422037 DC
Title	BS 1363-3. 13 A plugs, socket-outlets, adaptors and connection units – Part 3. Adaptors. Specification
Descriptors	Earthing, Electric connectors, Electric pins, Electric terminals, Electrical household appliances, Electrical safety, Electrical testing, Endurance testing, Fuse-links, Fuses, High-voltage tests, Impact tests, Plug adaptors, Safety measures, Socket adaptors, Test equipment
Publisher	BSI
Committee	PEL/23
ICS Codes	29.120.30 - Plugs, socket-outlets, couplers

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