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6A lighting cct to supply a 13A socket

So, we all know about feeding lights from a socket cct, but would you do it the other way around, running on to a single 13A socket from a 6A lighting cct (which is wired in 1.5mm2, to run a few LED's) to supply a lawn mower and similar items? Somebody was given a quote to install the socket.


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  • I find it most interesting that many seem to find the ability to "gold plate" simple regulations. There is nothing to say that any circuit CPD may not be less than the possible load! If the cable is of a suitable size for the CPD then everything is perfectly safe. If someone later comes to change the CPD for a larger one then that is his problem. There is nothing that I can think of that says that lighting and power circuits are in any way different, it is just conventional to separate them, and to use accessories such as light switches with a matching current rating. There is nothing to stop you fitting a light bulb to a 100A circuit as long as the cable can withstand the possible short circuit condition. This may be achieved by a further fuse or simply wiring in rather large cable, and using a 100A switch (to withstand the short circuit condition). Where accessories have reduced fault ratings of course you must take action to prevent danger, usually bu fusing down to suit. Just think about it, does a radial circuit with 20 off 13A sockets need a CPD rating of 260A, of course not?
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  • I find it most interesting that many seem to find the ability to "gold plate" simple regulations. There is nothing to say that any circuit CPD may not be less than the possible load! If the cable is of a suitable size for the CPD then everything is perfectly safe. If someone later comes to change the CPD for a larger one then that is his problem. There is nothing that I can think of that says that lighting and power circuits are in any way different, it is just conventional to separate them, and to use accessories such as light switches with a matching current rating. There is nothing to stop you fitting a light bulb to a 100A circuit as long as the cable can withstand the possible short circuit condition. This may be achieved by a further fuse or simply wiring in rather large cable, and using a 100A switch (to withstand the short circuit condition). Where accessories have reduced fault ratings of course you must take action to prevent danger, usually bu fusing down to suit. Just think about it, does a radial circuit with 20 off 13A sockets need a CPD rating of 260A, of course not?
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