OP
pencilpusher
You wont find any reference to BS 1361 in the new amendment as it no longer exists. It has been replaced by BS 88-3.:stooge_curly:
Ah ha Thanks Lenny so it has.
Discuss adiabatic on earth bonding in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net
You wont find any reference to BS 1361 in the new amendment as it no longer exists. It has been replaced by BS 88-3.:stooge_curly:
No.
You can't use a measured value with a tabulated value.
A 100A BS 88-3 fuse will operate in just over 0.4s with an earth fault current of 1045, as it's only 5A, you might want to use the 0.4s value.
Otherwise, you would have to use the 850A and 1s values.
With cartridge fuses, 10mm² is sufficient for up to 100A, where the value for k is 143.
it's basically to do with the cable/s withstanding a certain level of current without overheating to the detriment of the cable. it's not exactly a correct use of the word adiabatic, but ......
look at 543.1.3 the bs7671 refers to the equation as an adiabatic equation in that reg. however, it's not exactly accurate, as the term adiabatic means " WITHOUT LOSS OR GAIN OF HEAT"
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