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Ok just a quick one got brane freeze here a 20a radial can be no more than 50m2 so if this is a straight run what length is it basically how do you convert square metre into metres in a straight run thanks in advance
Discuss Radial length in the UK Electrical Forum area at ElectriciansForums.net
It's the floor area that matters. ie, the area of the rooms served by the circuit.
Yes, but I think the OP has it in mind to have a long radial with one outlet on it so the "floor area" is a bit irrelevent!
I think it is poor that many cannot work out the maximum length of a circuit by calculating the volt drop and potential Zs of a circuit.
These calculations are really simple, and should be second nature to a working electrician - even asking what the max. length should be is wrong, as all the details are easily available for standard circuits in the OSG. if one is 'mathematically challenged'.
These calculations are really simple, and should be second nature to a working electrician
Now that's a basic question lol, simply divide the customers required load in amps by the cost of a pint multiplied by number required. E.G MAX LOAD =30A cost of pint= £2.50x no reqd = 0.833 pence per Amp/pintAbsolutely. I'm not having a go at the OP but the first few posts of the thread really had me scratching my head! Totally separate considerations - the area served which governs whether the circuit is likely to fulfil the user's power consumption needs, and the length of the cable that governs the loop impedance and voltage drop, i.e. safety and efficiency of the circuit. The latter can be addressed by a larger cable for a given size of circuit, the former only by more or larger circuits.
BTW can anyone tell me how to convert amps into pints?
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