Day 168 - 03 Oct 95 - Page 39


     
     1
     2   MR. JUSTICE BELL:  Yes, but what I am trying to get hold of,
     3        because what I understand the point made here is the RCD
     4        system is put in as a safety measure.  What I think is
     5        being suggested is that there is a situation where it was
     6        bypassed so that such safety function as the RCD system
     7        provided was no longer there?
     8        A.  Yes, and you would -- in that case there would be -- in
     9        that situation it would be the case and you would just have
    10        to, I mean, all the equipment is individually fused as
    11        well.
    12
    13   Q.   I understand that, but is what you are saying is if it
    14        tripped ---
    15        A.  Yes.
    16
    17   Q.   -- you turned off all the equipment on that circuit, you
    18        press the reset button, one by one you plug in the pieces
    19        of equipment on that circuit and you do not get a trip
    20        again, therefore, you have an indication that it is not a
    21        fault in an individual piece of equipment.  So far so
    22        good?
    23        A.  That is right.
    24
    25   Q.   But what do you do next?  Is it in that situation that you
    26        bypass the RCD system or what?
    27        A.  No.  You leave the -- if the RCD still works, then you
    28        leave it in.  You just make a note of the fact that it did
    29        trip out.  It is only if you -- when you plug the equipment
    30        back in, for instance, it would not be one specific piece
    31        of equipment, it would be any piece of equipment that you
    32        plugged in, it would trip -- when it tripped the RCD.  If
    33        you plugged the grill in and it stopped, you would think
    34        that that grill is the problem.  But if you plugged in --
    35        if the first piece of equipment you plugged in did not
    36        work, you might then plug -- "I will leave that unplugged",
    37        plug another piece of equipment in and that did not
    38        work  ---
    39
    40   Q.   I see.
    41        A.  If it became apparent that no power at all would get
    42        through, then it was the RCD.
    43
    44   Q.   So if you found that the trip was not specific to one piece
    45        of equipment then you would bypass -----
    46        A.  That is right, then you would try resetting it and if
    47        it failed to reset ----
    48
    49   Q.   And you would log that?
    50        A.  -- then you would make a log of that on the inside of 
    51        the door where the RCD panel is. 
    52 
    53   Q.   Just a moment.  What I have noted was that if you found it
    54        was not specific to one piece of equipment, you would log
    55        it and bypass the RCD equipment?
    56        A.  That is right.
    57
    58   Q.   How do you do that?
    59        A.  There is a control fuse which you remove.  You would
    60        then just unlatch that control fuse.

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