BS 6709:1986

This British Standard specifies requirements for the construction and testing of interconnected electrical apparatus, including systems and components1), for use in mines susceptible to firedamp.

NOTE 1 The means of interconnection covered by this standard may be electrical, mechanical or involve the housing of one constituent within another.

This standard applies in circumstances where new apparatus, that has been designed and constructed generally in accordance with BS 5501, cannot fully comply with BS 5501 because of the provision made for connection by electrical and/or mechanical means to existing apparatus previously certified as complying with BS 2293), BS 1259 or BS 4683 to comprise a single unit or system.

NOTE 2 For the purpose of this standard, apparatus that would otherwise be required to comply specifically with BS 5501, BS 229, etc., is described as, for example, “BS 5501 type”, “BS 4683-2 type”, etc. However, it is important to appreciate that the use of such descriptions is not intended to imply that the apparatus actually complies in all respects with the standard referred to although it may have been designed, constructed and certified in accordance with the standard referred to prior to being functionally connected.

References to apparatus previously certified to BS 1259 and any requirements specified in this standard for such apparatus are not intended to apply to circuits designed in accordance with BS 3101, or to earth fault monitoring circuits associated with motor control gear, unless otherwise stated.

NOTE 3 The titles of the publications referred to in this standard are listed on the inside back cover.

Requirements for the construction, including marking, and testing of interconnected electrical apparatus, including systems and components.