Junction boxes have an advantage here in that all wiring and joins are housed within the junction box itself, leaving no exposed bare wires that can be touched or knocked. You might be thinking that block connectors do the same job and you would be right, but they do leave quite large sections of wiring exposed and if you have removed long lengths of the protective sleeve from wires, bare live wires can be easily accessible and cause an obvious danger. As a result they are commonly used and very useful for anyone involved in wiring and electrics. Whenever you need to join two or more electrical wires, then you should use a junction box. In short they are used for joining wires or running a spur from an electrical circuit safely.
If a wire has become damaged, the damaged section can be cut out and teh two sections joined back together again using a junction box. Junction boxes can be used to connect additional sockets to circuits, add lighting points, extend circuits, and in general they are a way of getting power from an existing source and taking it somewhere else. Make sure you turn all power off and isolate the circuits you are working on.
Please be absolutely sure you know what you are doing and get all of your work checked by a qualified electrician. This can affect your sale, you could be breaking the law and your house insurance may not be valid. Part P of the new building regulations could involve a check on any additional circuitry by qualified electricians when you sell your home. This does not preclude their specification and installation, however there are significant technical and contractual obstacles to be overcome in respect to the requirements of BS7671 and this will attract consultation and agreement activities between competent persons and 'duty of care' responsibilities.Warning: To complete electrical works you must comply with Electrical Regulations – Click here for more information. Nonstandard flexible ‘control’ cable (often described as YY, CY and SY) cable is NOT manufactured to a recognised standard applicable in the UK and therefore could never be 'automatically' compliant with BS7671 and BS EN 50565-1.
The recommendation is to use Medium duty or heavy-duty type and be adequately mechanically protected.
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This is a very subjective position and hence represents a contractual risk.įlexible cables for use in the UK should meet the requirements of BS EN 50525 series (for example BS EN 5 or BS EN 5). Flexible cables are generally acknowledged as having a lower installation life than other cable types (BS EN 50565 – 2014 refers). I believe however that Installers and designers should proceed with caution, clearly establishing that the requirements of the Wiring Regulations and contractual obligations are met, particularly in respect to installation methods and current ratings, including any appropriate allowances for grouped or bunched de-rating. Gary holds a Bachelor of Engineering Degree in Electrical & Electronic Engineering along with numerous years of experience across many aspects of the electrical industry.īS EN 50565-1 and BS7671 (521.9.9) state that flexible cables may be used in ‘fixed installations’. It would be sensible to ensure these requirements are met. Installation and service, due to impact or other mechanical stresses, is low or has been minimized or protection Flexible cables used for fixed wiring shall be of the heavy duty type unless the risk of damage during Lighting system will be Dali so I would like to use 5 core for example:ģ185Y 1.5mm 5 core cable rated for use up to 500 VoltsīS 7671 allows flexible cables to be used however, it does stipulate that:Ī flexible cable shall be used for fixed wiring only where the relevant provisions of the RegulationsĪre met. This is typical domestic installation, cable will run clipped over ceiling and inside partitions, plaster, dry locations only. Hi, I have question about flexible cable.Ĭan it be used for the wiring of lighting installations? Mainly LED downlights. This Q & A is one of the thousands posted in our Technical Expertise area and answered by our Voltimum Experts.
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