The British Electrotechnical and Allied Manufacturers’ Association (BEAMA) recommend that for a multi-row consumer unit where compliance with mounting heights of ADM1 above cannot be achieved for all switches thereof, the consumer unit should be mounted such that the bottom row of switches are located between 1350 mm and 1450 mm so that they are out of reach of young children to avoid interference and inappropriate operation. Northern Ireland – Technical Booklet R does not provide specific information on mounting height for consumer units but for controls that require close vision are required to be located between 1200-1400 mm above finished floor level. Whilst there is no minimum height indicated it would seem sensible to locate consumer units at least 900 mm above floor level (the lower limit for light switches). Scotland – Technical Handbook D10 does not provide specific information on mounting height for consumer units but requires electrical controls (which would include consumer units) to be positioned not more than 1200 mm above floor level, unless the need for a higher location can be demonstrated. Wales – Approved Documents P and M do not provide specific information on mounting height for consumer units but controls that require close vision are required to be located between 1200-1400 mm above finished floor level. Yes, the requirements for mounting height are different for each of the devolved governments as follows:Įngland – Approved Documents P and M call for consumer units to be mounted so that the switches are 1350-1450 mm above finished floor level. Q1.17ĭoes BS 7671 permit connection of smoke alarms to an adjacent lighting circuit taking into account Regulation 560.7.1, which states that circuits of safety services shall be independent of other circuits? In our opinion ‘separately electrically protected’ does not preclude sharing an RCD with several other circuits where this is permitted by BS 7671. We recommend option ii) on the grounds that disconnection of the supply to the fire detection and alarm system will be more readily noticed. Ii) a separately electrically protected, regularly used local lighting circuit. I) an independent circuit at the dwelling’s main distribution board, in which case no other electrical equipment should be connected to the circuit (other than a dedicated monitoring device installed to indicate failure of the mains supply to the smoke and/or heat alarms), or There are no particular requirements or limitations in BS 5839-6 concerning the use of RCDs with Grade D fire detection and alarm systems.įor Grade D systems, which comprise one or more mains-powered smoke alarms each with an integral standby power (such as typical domestic smoke alarm with battery), BS 5839-6 simply recommends that the mains supply to the smoke and/or heat alarms should take the form of either:
0 kommentar(er)
