BS EN 60669-1 pdf free download
BS EN 60669-1 pdf free download.Switches for household and similar fixed-electrical installations — Part 1: General requirements.
4 General requirements Switches and boxes shall be so designed and constructed that, in normal use, their performance is reliable and without danger to the user or the surroundings. Where tolerances are not specified in this standard the values are to be regarded as nominal . Compliance is checked by meeting all the relevant requirements and tests specified. 5 General notes on tests 5.1 Tests according to this standard are type tests. 5.2 Unless otherwise specified, the specimens are tested as delivered and under normal conditions of use. ! Switches having provision for pilot lights shall be tested with pilot lights fitted, unless otherwise stated. The results of the tests shall be considered to apply to switches of the same type which do not have this facility.” Flush-type switches which do not comply with any accepted standard sheet are tested together with the corresponding boxes. 5.3 Unless otherwise specified, the tests are carried out in the order of the clauses, at an ambient temperature between 15 °C and 35 °C. In case of doubt, the tests are made at an ambient temperature of 20 °C ± 5 °C. 5.4 For switches which are marked with one rated voltage and one rated current, nine specimens are necessary.Three specimens are subjected to all the relevant tests, except the tests of 19.2, where one further set of three specimens is used (or two further sets for switches of pattern number 2), and the test of clause 24, where another three specimens are used. For the test of 24.2, three additional specimens may be required. For the tests of 12.3.2, three additional specimens of switches are necessary. For the tests of 12.3.11, additional specimens of switches having in total at least five screwless terminals are required. For the tests of 12.3.12, three additional specimens of switches are necessary; in each specimen, one clamping unit is tested. For each of the tests of 13.15.1 and 13.15.2, three additional specimens of separate membranes, or of switches incorporating membranes, are required. a For the tests of clauses 15, 16, 17.1, 18, 19, 20, 21, 22 and 23 three additional specimens may be required in the case of switches fitted with pilot lights which are not able to be disconnected and reconnected. For these tests one pole of the pilot light is disconnected . The disconnection shall be done in a way which does not adversely affect the test results.For cord-operated switches, three further specimens are used for the test of 20.9. For switches marked with two rated voltages and corresponding rated currents, fifteen specimens are necessary. For each of the two combinations of rated voltages and rated currents marked on the switch, three specimens are subjected to all the relevant tests except the test of 19.2, where two (or four for switches of pattern number 2) further sets of three specimens are used. Switches marked with a dual voltage are tested at the higher voltage. Momentary contact switches are not to be submitted to the tests of 18.2 and 19.2 . NOTE – A table showing the number of specimens needed for the tests is given in annex A. 5.5 The specimens are submitted to all the relevant tests and the requirements are satisfied if all the tests are met. If one specimen does not satisfy a test due to an assembly or a manufacturing fault, that test and any preceding one which may have influenced the results of the test shall be repeated and also the tests which follow shall be made in the required sequence on another full set of specimens, all of which shall comply with the requirements. BS EN 60669-1 pdf download.
