![]() It is purely the area of the copper wire. ![]() ![]() or in more simple terms the area of the exposed face of the wire, does not include the insulation around it. The area, or cross sectional area of this circle is 1.5 square mm or 2.5 square mm.Ģ.5mm cable means a cross sectional area of 2.5mm of the live or neutral wire If you snip one of the wires and look at one of the wires face down you will see it’s cross section. Each one of the live and neutral wires has a cross sectional area of 1.5mm or 2.5mm.ġ.5mm cable means a cross sectional area of 1.5mm of the live or neutral wire This is not the combined cross sectional area. What Does 1.5mm or 2.5mm Cable Mean?ġ.5mm and 2.5mm is the cross sectional area of the individual live or neutral wires in the 1.5mm or 2.5mm cable. This should be sufficient for most domestic socket and lighting circuits. The cross sectional area of the earth wire in a 1.5mm cable is 1mm and in a 2.5mm cable it is 1.5mm. Using the incorrect size cable in this case may result in a fairly large amperage drop resulting in not enough electrical power actually making it to the end of the cable. As mentioned, appliances such as electric power showers, large cookers, electric car chargers etc will all draw larger amounts of current so will generally require a larger size cable to supply the required current and prevent too much current being drawn which can cause overheating and the potential for the cable to catch fire!Ī larger size cable may also be used in situations where an electric supply ends to be run over a long distance. The situations in which you would use a larger cable size really depends. Even larger sizes of cable include 25, 35, 50, 70,95, 120, 150 all the way up to 1000 square mm, over 20 different sizes in total. These are mostly used for appliances and objects that require much more electrical power to operate or special use situations. This one features an in-built USB port What About Other Cable Sizes?Īside from the 3 most commonly used cable sizes of 1, 1.5 and 2.5mm twin and earth there are in fact several other larger sizes of cable that include 4mm, 6mm, 10mm and 16mm. Standard double socket as seen in many homes across the country. The size of cable used for sockets needs to be larger than that used for lighting circuits because that it will have to cope with more load due to the number of different appliances with different power supply needs that could potentially be plugged in. In most domestic situations the cable size used for sockets on a ring main or radial main is 2.5mm twin and earth cable. Lighting is usually fed by a 1mm or 1.5mm cable What Size Cables for Sockets? If quite a few are required or the cable run is over a long distance, then 1.5mm cable should be used to cope with supply demand and voltage drop. In most cases 1mm should be fine but depends on how many lights are on the circuit and how long the cable run is. The Cable sizes for domestic lighting circuits is usually 1mm or 1.5mm twin and earth cable (aka two core and earth). To learn about all the different sized electrical cables that are used in your home and how they should be used, read on below. With this in mind, ultimately the appliances or items that will draw power from the circuit and the location in which cables will run that decides on the size of cable required. a cable installed in an empty stud wall will dissipate heat much easier than a cable in a loft that buried under 200mm of insulation, so this needs to be considered also. This can be further complicated by the location in which they will be installed and how effetely a given cable will be able to disperse heat e.g. We've got several finance options to help you spread the cost, covering spends over £99*.The electrical cables used to power the lights and appliances in your home come in several different cable sizes, primarily to accommodate the amount of current required to run the items that are drawing power from it.Īll cables are rated to carry a specific amperage meaning that the load imposed on them should be no more than they are able to safely carry. *Finance available subject to credit assessment, terms and conditions apply, you must be aged 18+ and a permanent UK resident, please spend responsibly. If (document.getElementById('bvseo-reviewsSection')) Great quality fuse, definitely will buy again, decent price, will last long Bought and fitted for my campervan electrics. Replacement fuse for an electric tyre inflator. I bought this and guess what it worked really useful for a fuse Only wanted one, so good I could buy small packet rather than a large multi box
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