Search results

are all rubber insulated cables imperial in csa ?

I believe they are Sodium lamps go to local whole salers and ask for advise on SON light fittings

Is the clamp meter part of the Fluke T5 accurate, anyone know?

instantaneous only at 5x current and above... less than 5x current takes time to disconnect (thermal part as spark says) If your earth loop isnt low enough to allow 30 amp (5x current) through then it doesnt comply with regs... therefore thermal part for overload protection rather than...

ok, thanks everyone for the help

NIC tech manual shows that if you supply out building the earth you provide has to be main bonding conductor and CPC combined the calc i did above does give the equivalent steel CSA to copper, right ? a cable manufacturer said that you have to multiply the required csa of copper by 7.5...

sorry to bring this up again... 100 amp supply, 16mm main earth so 10mm main equipotential bonds 10mm copper required, but using steel .. k1/k2 x 10 would give me the equivalent CSA for steel ? 115 / 51 = 2.25 x 10 = 22.6 mm Steel =>22.6 steel required to equal 10mm copper so i...

the areas supplied by the seperate supplies are well divided changing to just the 3phase supply is a good idea and much safer thing to do as isolation by one isolator ... but wouldnt the water still need bonding by the both supplies still whether its in use or not ?

Yes its all 25mm tails, 16mm main earth, 10 mm main equipotential bonds Where do i bond on the old water main if there is nothing coming off the consumer side of the stop cock ? we arent supposed to bond on supply side of services right ?

What should be done in the following scenario.. ? two shops divided by a wall.. "Shop A" 3 phase 100 amp TNCS "Shop B" single phase 100 amp TNCS The wall was knocked down making just one Shop with 2 TNCS supplies. Both Shops had a seperate water main, but now, "Shop B" water main...

no im not sure, but used that as an example ... will check which type of cable and fuses if i plug in the right info then that is the correct way to do it, yes ? Does the table you linked come from guidance note 1 or similar table ?

no idea what XPLE is :oops: i havent installed the cable... which is the most common SWA installed ? dunno i will have to check what it says

using adiabatic eq. BS 88 63 amp 0.4ohm earth loop =0.2 secs disconnection 600 x 600 = 360,000 x 0.2 = 72000 sqrt 72000 = 268.3 SWA K = 51 268.3 / 51 = 6 mm2 CSA 16mm2 2 core SWA = 46mm2 so therefore its fine as a supply to a fuse board ? and the table shows...

yeah its definately not live conductor :D

when you say SWA can only be used as CPC ... does this mean i can or can not use it to supply another fuse board, as a supply earth atm i have ... TN-S 63 amp supply to out-building using 2 core SWA there out building has no water/gas services therefore the supply earth doesnt need...

i found the K value and formulae to work it out ... just needed to know, how i know the CSA of my armouring, to ensure it complies thats great ... is that in the regs any where you know of ?

If i have 16mm2 two core SWA ... how do i determine the CSA of the steel armouring ? a) would it have the equilvalent current carrying capacity as the P+N conductors ? ie 60amp copper - 60 amp steel armour b) would it have the same CSA ie 16mm2 copper therefore 16mm steel wire c) or...

but as i have earthed metallic conduit, trunking and back boxes, then it is EADS ? or just ADS ?

what must be bonded if there is no services to bond to ?

no its a small installation as a practical at college .... so no water/gas .... its like a mini installation