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  1. laughingjester

    calculating short circuit capacity for a domestic circuit

    im trying to prove , k2S2 of the live conductors are greater than the value of let-through energy (I2t) for the RCBO's im using on all circuits . now i only need to know the value between L-N because i know the rcd part of the rcbo will protect any earth fault, its just overcurrent i need to...
  2. laughingjester

    vokera linea pressure problems

    my vokera linea has recently started to lose pressure i topped up boiler to 1.5 bar . and thought nowt of it. came home from work and it was at 0.3 bar (in the red) i've checked all rad valves and joints and they dont seem to be leaking? what other causes could there be? thanks.. :x
  3. laughingjester

    earthing nuts !

    had about 30 armoured ends to make off recently on a garden lighting job, was well happy when i found these handy bits of kitt, EARTHING NUTS. They replace the original locking rings you get with gland packs and you dont have to mess about with the earthing tags (lining them up, drilling the...
  4. laughingjester

    rcd question?

    i am an self employed electrician and have a quick question im stumped on...i've just changed an old re-wireable fuse board for a new wylex split load duel rcd consumer unit, and whilst working on the new installation found that after i isolated the circuit wich im working on, when i cut through...
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