BS 6396-2008 pdf free download

BS 6396-2008 pdf free download.Electrical systems in office furniture and educational furniture – Specification.
NOTE It is recommended that the electrical system installed in the office furniture or educational furniture is periodically maintained, inspected and tested for continued safety.
7.2 Continuity and polarity
A test of all conductors, including the protective earth conductor, shall be made to verify their continuity and correct polarity. This test shall include the supply cord and plug. The electrical system shall be inspected to ensure that any fuses and any single pole switches fitted are connected only in the live conductor.
The values for resistance of earthing conductors shall conform to the requirements specified in 7.4.
7.3 Insulation resistance
The insulation resistance of completed electrical installations shall be tested using a 500 V d.c. test supply. The measured resistance shall be not less than 1 Mci. Tests shall be made between conductors and also to earth of the supply cable. The duration of each test shall be not less than 5 s.
Neon indicators shall be removed from the circuit before carrying out this test between conductors by switching off the socket outlet. Where luminaires contain sensitive electronic components, these shall be disconnected prior to the test (see BS 7671:2008, 6 12.3.3).
7.4 Earth continuity
Earth connections of the installed socket outlets and the accessible metal parts of earthed office furniture and educational furniture shall be tested by passing a current of not less than 1.5 times the rating of the supply plug fuse and not greater than 25 A, derived from an a.c. source with a load voltage not exceeding 12 V.
The tests shall include the supply cord and shall be carried out between the earth pin of the supply plug, the earth connections of the installed socket outlets and, where applicable, the accessible metal parts of earthed furniture.
The duration of the tests shall be for a period of between 5 s and 20 s. The resistance shall not exceed 0.1 Ω.BS 6396-2008 pdf free download.