But I am not referring to the Schedule of Test Results - an Inspection Schedule can apply to either an EIC OR a PIR but not both at the same time.My question remains unanswered:
How do you differentiate between the limitations on the existing circuit inspection and the new circuit inspection within the same a single EIC?
If you are certifying a consumer unit with new circuits and reconnecting existing circuits you will need two Inspection Schedules, which will require both a PIR and an EIC.
Professional, if you are not doing a PIR as well as the CU swap, then you are issuing an EIC with a 'Schedule of Inspections' that apply to your CU swap only.
In the box headed :
Extent of installation covered by this Certificate - you would write....
CU change only.
Anything that doesn't apply to the CU swap gets a
N/A in the box.
For example:-
Presence of Earthing Conductor would get a '
tick'
Presence of Supplemetary Bonding Conductors would get a
N/A
Selection of conductors for current-carrying capacity and voltage drop would get a
N/A.
NOW, if you were also adding two
new circuits with your CU swap then, in the box headed :
Extent of installation covered by this Certificate , you would write....
CU swap and circuits R4 and L6. (or something similar)
So now,
Selection of conductors for current-carrying capacity and voltage drop would get a
'tick'
But it only applies to your
new circuits!!
Then, testing the existing circuits.
If you are doing a PIR, you are testing the circuits as part of a whole installation - just as you will have 'inspected' said circuits prior to doing your testing.
On a CU change, you are testing the existing circuits because they are connected to your new CU and associated protective devices.
Yes, they are the same tests that you would apply to new circuits - but 'inspection' of the existing installation would be very limited. (unless doing a PIR as well)
The test results for the 'existing' circuits are recorded on the 'Schedule of Test Results' that will accompany the EIC that covers your CU change - because they are relative to your CU change
E.G.
Continuity of Protective Conductors -
relative to ensure new protective devices are going to operate.
RFC conductor continuity -
relative, as you don't want to connect up a split ring etc.
IR -
Obviously relative, but Live conductors connected together to earth will do.
Polarity - at extremity of radials, once again, you want your new protective devices to operate.
Zs -
relative to confirm your new protective devices will operate within given times.
RCD - obviously!
Like I said, both inspection and testing are only what's relative to your
Extent of installation covered by this Certificate - not the existing installation.
If that makes sense:Blushing