Failing RCBOS In "TT" caravan park install

Discussion in 'Electricians' Talk' started by Barry sharp, May 24, 2015.

  1. chippie244

    chippie244 Super Member

    You both may be talking about different impact drivers. One is a hand held tool you smack with a hammer to loosen tight screws, the other is a cordless screwdriver with a ratchet action.
     
  2. unphased

    unphased Screwfix Select

    Yes I am referring to portable 18V impact screwdrivers that look like a drill that vibrates the screw in to the material being fixed to and serves as a super fast unscrewing tool when undoing screws. (Cordless tool with a ratchet action).
     
  3. seneca

    seneca Screwfix Select

    Ok UP, yes that's where the confusion came from, but again although I use a cordless i'd only use it for screwing into or out of wood or brickwork etc, not for electrical connections into accessories.
     
    Lectrician likes this.
  4. sinewave

    sinewave Screwfix Select

    Electrical Impact Drivers were primarily developed for inserting screws, not undoing them.

    Initially for big wood screws in construction First Fix etc

    The fact they undo stuff quite well is just a useful by-product! :cool:
     
  5. chippie244

    chippie244 Super Member

    I think they were originally developed for tightening nuts before Kelly Brookes was invented :rolleyes::rolleyes::rolleyes:
     
  6. sinewave

    sinewave Screwfix Select

    Tightening Nuts?

    Mine just explode where Kelly is concerned! :D
     
  7. peter palmer

    peter palmer Screwfix Select

    They really can be quite useful, how many times have you tried to tighten a cheap main switch terminal and virtually twisted it out of the plastic with the switch nearly splitting in two? an Impact driver if used delicately will concentrate the torque onto the screw itself without twisting round the whole connection, its a much better way of tightening and undoing some screws without the collateral damage. Quick too.

    Dont use it live though I doubt they are VDE rated.
     
  8. sparky Si-Fi

    sparky Si-Fi Screwfix Select

    My 10.8V Makita ratchet does the job nicely on busbars on CUs, just have to know to go steady on the trigger
     
    unphased likes this.
  9. MGW

    MGW Screwfix Select

    I will guess cable is too thin. If the terminal binds before it is tight then a torque screw driver will tighten the screw but the wire is still not clamped. I have had this with a flex where one strand has got into the threads so screw feels tight but wire is loose. Also poorly taped terminals. With the latter once they heat up it expands the thread so when checking it seems as if never tightened up. I always test the screw will actually tighten up.

    If the cable was doubled up in the terminal likely it would be OK. Also simply not twisting cable can mean it will not be tight. I have had it with small flex cables where although screw is very tight slight tug and cable comes out.
     
    unphased likes this.

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