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BSI 22/30422033 DC 2022

BSI 22/30422033 DC 2022

$13.70

BS 1363-1. 13 A plugs, socket-outlets, adaptors and connection units – Part 1. Rewirable and non-rewirable 13 A fused plugs. Specification

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BSI 2022 78
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PDF Pages PDF Title
1 30422033_Form 36
3 BS 1363-1_REVISION_2230422033_DPC_21.09.22_text
8 1 Scope
2 Normative references
10 3 Terms and definitions
3.1 accessible external surfaces of a plug
3.2 actuating member
3.3 basic insulation
3.4 calibrated link
3.5 clamp type (screwless) terminal
3.6 class I
3.7 class II
11 3.8 clearance
3.9 creepage distance
3.10 engagement surface of a plug
3.11 fine wire thermocouple
3.12 functional insulation
3.13 fuse carrier
3.14 fused plug
3.15 indicator lamp (pilot lamp)
3.16 insignificant mass
3.17 insulated shutter opening device (ISOD)
3.18 live parts
3.19 moulded-on plug
3.20 non-rewirable plug
3.21 plug
3.22 rated voltage
3.23 reinforced insulation
12 3.24 resilient material
3.25 rewirable plug
3.26 rough use plug
3.27 screw-type terminal
3.28 small parts
3.29 switched plug
3.30 supplementary insulation
3.31 terminal
3.32 termination
3.33 type test
3.34 type test sample
4 Conditions of use
13 5 General
6 General conditions for type testing
6.1 All tests shall be type tests.
15 6.2 All inspections and tests, of any one classification (see Clause 6), 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 shall be considered to conform to the dimensional requirements if the results of the measured values are within the specified dimensions and the uncertainty of measurement at not less than 95% confidence level do…
16 7 Classification and rating
7.1 Classification
17 7.2 Rating
8 Marking and labelling
8.1 Plugs 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 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 a plug fitted with a flexible cable is supplied direct to a manufacturer for incorporation in other equipment, the free end of such as assembly shall have a label attached which shall include the following:
8.3.1 Conformity shall be checked by inspection.
8.4 Rewirable 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.
8.5 Symbols shall be as follows:
19 9 Clearances, creepage distances and solid insulation
9.1 Clearances
20 9.1.1 Clearances for basic insulation
9.1.2 Clearances for functional insulation
9.1.3 Clearances for supplementary insulation
21 9.1.4 Clearances for reinforced insulation
9.1.5 Contact gap
9.2 Creepage distances
9.2.1 Creepage distances for basic insulation
22 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.
9.4 Requirements for printed wiring boards and equivalent construction
Printed wiring boards and equivalent construction shall conform to BS EN 60664-5:2007.
Where coating, potting or moulding is used articles shall conform to BS EN 60664-3:2003+A1:2010.
10 Accessibility of live parts
10.1 Live parts of plugs shall not be accessible when the plugs are wired as in normal use and in full engagement in a corresponding socket-outlet.
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 rewirable plugs fitted with a 2-core flexible cable as given in BS EN 50525-2-71:2011 and non-rewirable plugs as supplied. Deta…
23 10.2 Plugs shall be designed and constructed so as to protect the user against accidental contact with live parts during insertion or withdrawal of plugs.
10.2.1 Conformity shall be verified by satisfying the dimensional and gauging requirements of this part of BS 1363.
10.3 Resilient covers of plugs 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 reduce creepage …
10.3.1 Conformity shall be checked by the following test (an example of a suitable apparatus is shown in Figure 2a) and Figure 2b).
24 10.4 Except for a plug fitted with a flexible cable supplied to equipment manufacturers for incorporation into their equipment, a plug supplied with a flexible cable shall have the free end encapsulated in insulating material.
10.4.1 Conformity shall be checked by inspection.
25 11 Provision for earthing
11.1 All accessible metal parts of plugs shall be in effective electrical contact with the earthing plug pin, except that metal parts on, or screws in or through, non-conducting material, and separated by such material from current-carrying parts in s…
11.1.1 Conformity shall be checked by inspection and the following:
26 12 Terminals and terminations
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 plugs shall be provided with terminals as defined in 3.8 or 3.9.
12.2.1 Conformity shall be checked by inspection.
12.3 Non-rewirable plugs 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 durin…
12.3.1 Conformity shall be checked by inspection and measurement.
12.4 Terminals in rewirable plugs 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…
27 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 rewirable 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 negligible risk of the f…
12.7.1 Conformity shall be checked by inspection and by the following test.
12.8 Rewirable plugs shall be designed to 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 a plug wired in accordance with the manufacturer’s instructions.
12.9 In rewirable plugs terminals shall be so located or shielded so that where a strand of a flexible conductor might escape when the conductors are fitted, there is negligible risk of accidental connection between live parts and accessible external …
12.9.1 Conformity shall be checked by inspection, and by the following test.
28 12.10 Clamp type (screwless) terminals shall be so designed that they make electrical contact to the specified conductors, between metal surfaces with sufficient pressure, and without additional means to maintain the clamping pressure. They shall not …
12.10.1 Conformity shall be checked by the following.
12.11 Clamp type (screwless) terminals shall be so constructed that incorrect fitting of the conductor is prevented.
12.11.1 Conformity shall be checked by inspection.
12.12 Clamp type (screwless) terminals shall be adequately located in the plug when assembled for normal use.
12.12.1 Conformity shall be checked by inspection, and by the mechanical strength test given in 20.1.3.
13 Construction of plugs
13.1 The disposition of the 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 plug 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 not axial projection from the engagement surface of the plu…
32 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 plug measured along the engagement surface.
13.3.1 Conformity shall be checked by measurement.
13.4 A fuse link conforming to BS 1362:1973 shall be provided within the body of the plug and the fuse link shall be mounted in appropriate contacts only between the line terminals or termination and the corresponding plug pin in such a way that it ca…
13.4.1 Conformity shall be checked by inspection.
13.5 In non-rewirable 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.
13.5.2 For non-rewirable plugs 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 plug shall meet t…
33 13.5.3 Conformity shall be checked by measurement.
13.6 The base and cover of non-rewirable plugs shall be permanently attached to each other, such that the flexible cable cannot separated without making the plug permanently useless, and the plug cannot be opened by hand or by using a general purpose …
13.6.1 Conformity shall be checked by inspection and by the following tests as applicable.
34 13.7 Plugs shall be so designed and constructed that they cannot readily be deformed to allow access to live parts.
13.7.1 Conformity shall be checked by inspection and by the following test.
13.8 For non-rewirable 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 the plug.
13.8.1 Conformity shall be checked by inspection and the test described in 16.2.
13.9 Materials other than brass (having a minimum content of 58% copper) or nickel plated brass shall not be used in the construction of line and neutral plug pins except for sleeves of pins as specified in 13.16. Plug pins and ISODs shall conform to …
35 13.9.1 All exposed surfaces of 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.
13.9.1.1 Conformity shall be checked by inspection.
13.9.2 Those surfaces of the non-solid plug pins which are visible when the plug is correctly assembled shall be free of apertures.
13.9.2.1 Conformity shall be checked by inspection.
13.9.3 All seams and joints of non-solid pins shall be closed over their entire length.
13.9.3.1 Conformity shall be checked by inspection and in case of doubt by the following test.
13.9.4 Plug pins and ISODs shall have adequate strength to withstand the stresses of normal use.
13.9.4.1 For solid pins, conformity shall be checked by the following test.
36 13.9.4.2 For non-solid pins, conformity shall be checked by the following tests.
37 13.9.4.3 For ISODs, conformity shall be checked by the following test.
13.9.5 Plugs with nickel plated brass pins, non-solid pins and/or ISODs shall not cause excessive wear to socket contacts or shutters of socket-outlets in accordance with BS 1363-2:2022. For plugs with nickel plated brass pins and/or non-solid pins co…
13.9.5.1 Conformity shall be checked by the following tests.
13.9.5.2 Conformity shall be checked by the following.
38 13.9.6 Plug pins and ISODs shall have adequate mechanical strength to ensure that they cannot be distorted by twisting.
13.9.6.1 Conformity shall be checked by inspection and by the following test.
39 13.10 The terminals of earthing and neutral plug pins 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 not be…
13.10.1 Conformity shall be checked by inspection and the tests described in 21.1.3 and Clause 16.
13.11 Plugs 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 plug during normal use.
13.11.1 Conformity shall be checked by the following test.
13.12 The degree of flexibility of mounting of the 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 surface when t…
40 13.12.1 Conformity shall be checked by inspection and in case of doubt by the following test.
41 13.13 Suitable means shall be provided for withdrawing the plug without subjecting the flexible cable to stress.
13.13.1 Conformity shall be checked by inspection.
13.14 Non-rewirable plugs shall be fitted with flexible cables in accordance with 20.4.
13.14.1 Conformity shall be checked by inspection.
13.15 Conductive component parts of plugs 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 plug.
13.15.1 Conformity shall be checked by inspection and manual manipulations.
13.16 Line and neutral plug pins shall be fitted with insulating sleeves. The dimensions of the pin and sleeve shall fall within those given in Figure 4a). Sleeves shall not be fitted to any earthing plug pin.
13.16.1 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.
13.17 Plug pin sleeves shall have adequate electric strength, resistance to abrasion and resistance to deformation due to overheating of pins.
13.17.1 Conformity shall be checked by the tests given in 13.17.2 to 13.17.4.
13.17.2 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 plug pin sleeve adjacent to the base of the plug. Initially not mo…
13.17.3 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 s…
42 13.17.4 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 plug not used for the test described in 13.17.3.
43 13.18 Switches shall be so constructed that undue arcing cannot occur when the switch is operated slowly.
13.18.1 Conformity shall be checked by inspection and by the following test.
13.18.2 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 takes up a single rest position. The actuating mechanism shall…
44 13.18.2.1 Conformity shall be checked by inspection and the test of 13.18.3.
13.18.3 The necessary force (F) to switch off shall first be measured and the force shall be applied to the extremity of the actuating member.
45 13.19 Electronic components incorporated in plugs shall conform to Annex A.
13.19.1 Conformity shall be checked by inspection of component conformity evidence and the tests of Annex A.
14 (Not used)
15 Resistance to ageing and to humidity
15.1 Resistance to ageing
15.1.1 Conformity is checked by the following test.
15.2 Resistance to humidity
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.
46 16 Insulation resistance and electric strength
16.1 The insulation resistance and electric strength of plugs shall be adequate.
16.1.1 Conformity shall be checked by the tests described 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:
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 then being raised to 2 000 V ±60 V. The high voltage source used shall be such that when the output…
16.2 Non-rewirable 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 in contact with the entire outer a…
47 17 Temperature rise
17.1 Plugs and their surroundings shall not attain excessive temperatures in normal use.
17.1.1 Conformity shall be checked by the following tests.
50 17.1.2 Rewirable plugs are tested with 1 000 mm ±50 mm of 1.25 mm2 3-core PVC insulated flexible cable as given in BS EN 50525-2-11:2011, non-rewirable plugs are tested with 1 000 mm ±50 mm (measured from the centre of the earth pin) of the flexible c…
18 Breaking capacity of switches incorporated in fused plugs
18.1 The breaking capacity of switches incorporated in plugs shall be adequate.
18.1.1 Conformity shall be checked by the following test. The switch shall make and break a current of 1.25 × rated current ±0.4 A (i.e. 1.25 × 13 A ±0.4 A) in a substantially non-inductive a.c. circuit at 275 V ±5 V, ten times in succession at interv…
51 19 Normal operation of switches
19.1 Switches incorporated in plugs shall withstand, without excessive wear or other harmful effects, the electrical and mechanical stresses occurring in normal use.
19.1.1 Conformity shall be checked by the following tests. The voltage drop across each switched pole, measured at points immediately adjacent to the switch, shall not exceed 60 mV at rated current. The switch shall then make and break a current of 13…
20 Connection of flexible cables and cable anchorage
20.1 The entry of the flexible cable shall be between the current-carrying pins at the side of the plug opposite the earth pin [see Figure 18].
52 20.1.1 Conformity shall be checked by inspection and by the following tests.
53 20.2 Cable anchorages in rewirable plugs shall anchor the flexible cable securely to the plug. The design shall ensure the following:
54 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 either the plug is rendered manifestly incomplete if the component is omitted or is replaced in an incorrect position, or the component inte…
20.3.1 Conformity shall be checked by inspection.
20.4 Non-rewirable plugs shall be fitted with flexible cables conforming to BS EN 50525-2-11:2011, BS EN 50525-2-12:2011, BS EN 50525-2-21:2011, BS EN 50525-2-71:2011 or with flexible cables conforming to the requirements of the specification appropri…
20.4.1 Conformity shall be checked by inspection and a continuity test.
20.5 Non-rewirable plugs shall be so designed that the flexible cable is not subjected to excessive bending where it enters the plug.
20.5.1 Conformity shall be checked by the following test using an apparatus similar to that shown in Figure 12. The plug is fixed to the oscillating member of the apparatus so that when this is vertical the axis of the flexible cable at the point of e…
20.6 The flexible cable entry to rewirable plugs shall be so shaped as to prevent damage to the flexible cable.
20.6.1 Conformity shall be checked by inspection.
55 21 Mechanical strength
21.1 Plugs 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 by the tests given in 21.1.2 and 21.1.3.
21.1.2 A solid link of stainless steel as shown in Figure 19 is inserted and withdrawn from the fuse clips of the plug 20 times in succession in a normal manner, at a rate not exceeding ten per minute. A standard fuse link conforming to BS 1362:1973 i…
21.1.3 Rewirable plugs are fitted with 3-core PVC 1.25 mm2 flexible cable as given in BS EN 50525-2-11:2011, the terminals and cover screws being tightened with the torque given in Table 6. Non-rewirable plugs are tested as delivered.
57 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.
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 (except for line and neutral plug pins) and earthing plug pins 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, resistan…
58 22.3.1 Conformity shall be checked by inspection and by the relevant tests described in 10.1, Clause 17 and Clause 25.
23 Resistance to heat
23.1 Plugs shall be resistant to heat.
23.1.1 Conformity shall be checked by the test described in 23.1.2 or 23.1.3.
23.1.2 Plug samples are kept for min in a heating cabinet maintained at 70 C ±5 C. During the test they shall not undergo any change impairing their further use and the sealing compound shall not flow to such an extent that live parts are exposed.
23.1.3 Plugs with external parts of resilient material, e.g. thermoplastics and 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…
60 23.2 Parts of insulating material shall be sufficiently resistant to heat having particular regard for their location and function in the complete plug.
23.2.1 Conformity shall be checked as follows:
24 Resistance to abnormal heat and fire
24.1 General
24.2 Glow-wire test
61 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 plug to become unsafe, shall be adequately protected against rusting.
25.2.1 Conformity shall be checked by the following test.
26 Electrical and thermal stress of clamp type (screwless) terminals
26.1 Clamp type (screwless) terminals shall pass the electrical and thermal stresses occurring in use.
26.1.1 Conformity shall be checked by the following tests.
62 27 Overload tests
27.1 Plugs shall withstand overload currents, which could occur due to overload, without creating a risk of contact with live parts.
27.1.1 Conformity shall be 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 The plug shall be subjected to a test current of 1.6 times the rating of the fuse for 60 min or until the fuse operates (if less than 60 min). Immediately afterwards, the checks specified in 27.1.4 shall be made.
27.1.3 . The plug shall be subjected to a test current of 1.9 times the rating of the fuse for 30 min or until the fuse operates (if less than 30 min). Immediately afterwards, the checks specified in 27.1.4 shall be made.
27.1.4 Each plug shall be checked for conformity with 10.1, 13.6.1a), 13.6.1b) and 13.11.1, except that the tests shall be performed at ambient temperature. Deterioration which does not compromise access to live parts (e.g. discolouring, distortion) s…
28 Cyclic loading test
28.1 Requirement
63 28.2 Testing
64 Annex A (normative) Requirements for incorporated electronic components
A.1 General
A.2 Electromagnetic compatibility (EMC) requirements
A.3 Surge protective devices (SPDs)
A.3.1 General
A.3.2 Requirements
65 A.3.3 Conformity
A.3.4 Incorporation of VDRs in plugs
A.3.5 Conformity
A.4 Electronic switches
A.4.1 General
A.4.2 Conformity
66 Annex B (informative) Recommendations for products that incorporate BS 1363-1:2022 plug pins
Annex C (normative) Pollution degree
67 Annex D (normative) Relation between rated impulse withstand voltage, rated voltage and Overvoltage Category
Annex E (normative) Impulse voltage test
68 Annex F (normative) Measurement of clearance and creepage distances
73 Annex G (informative) Dimensions for plug profiles
74 Annex H (normative)
The construction and calibration of a calibrated link
H.1 Construction
75 H.2 Calibration
77 Annex I (normative) Determination of the Comparative Tracking Index (CTI) and Proof Tracking Index (PTI)
The CTI or PTI is determined in accordance with BS EN 60112:2003+A1:2009.

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