Tense your buttocks, wait 5 seconds and push. The correct wire should appear out of your anus. Congratulations
a luminaire is defined as in bs7671
the uk electricity is generated at what KV?
buy one and youll find out
App 5
BS7671:2008 Requirements for Electrical Installations: IEE Wiring Regulations, 17th Edition. Strictly speaking, this document is published by the IET -the Institution of Engineering and Technology, as the IEE (Institution of Electrical Engineers) no longer exists.
BS7671:2008, Requirements for Electrical Installations, defines the design current (of a circuit) as 'the magnitude of the current (rms value for a.c.) to be carried by the circuit in normal service'.
According to BS7671:2008, Requirements for Electrical Installations, an overcurrent protection device rated at either 30 A or 32 A is required.
BS 7671; The IET Wiring Regulations (currently the 17th edition: 2008, with a first amendment made in July 2011) is a non-statutory document. However, the electrical industry deem it to be a minimum technical standard generally expected. If you had selected a way of designing/installing/verifying an installation or part of it, to a method other than as per stated within BS 7671, but it was equivalent in regards to safety, etc., then you may have a justifiable defense against legal issues.
Although you may hear the term 'phase wire' used in the field, the correct term* is 'line wire', or more properly, 'line conductor'**, and it is one of the three 'hot' (slang) conductors in a three-phase, three- or four-wire circuit (the fourth conductor being a neutral).[*Previous editions of BS7671 Requirements for Electrical Installations, used the term 'phase' to describe the 'hot' conductor. With the publication of BS7671:2008, this reference has at last adopted the correct terminology, and now uses the word 'line' throughout.][**They are called 'line' conductors, because the voltages measured between them are termed 'line' voltages even though, in the case of a delta-connected source, they are numerically equal to the corresponding 'phase' voltages.]
Massive of range of cables. Generally speaking lighting 1.5mm cable. Power 2.5mm cable. Anything feeding an appliance up to about 9.5kw 6.0mm cable. Above that 10.0mm cable. Domestic feed 25.0mm cable (16.0mm earth) hundreds of different supply and demand sizes. Refer to bs7671 17th edition for more information.
Unfortunately, there is no straightforward answer to this question. A cable's current-carrying capacity depends on various factors, including: the number of cores, its type of insulation, whether it's armoured or not, and the method of installation. Depending on these factors, the current-carrying capacity varies from around 14 A to around 21 A, but for specific information, you'll need to check out the appropriate Tables in BS7671:2008 Requirements for Electrical Installations.
Hi, The main difference is Fuel consumption. High current genertors always consumes much fuel because the load on the engine will be high. The high voltage low current generators doesn't need much fuel to run. You can understand this by comparing 1 kva and 5 kva single phase generators. For both generators voltage will be same (230v) But output current differs. So the fuel consumption also differs. But you get a high current source. Low voltage high current generators can be used for welding kind of stuffs which needs high current to do the job. If you have step down transformer then you can save the fuel.