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Discuss TESTING R1 + R2 garage supply in the Periodic Inspection Reporting & Certification area at ElectriciansForums.net

I

iceman

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hello im tryin to get ready for me assesment with the nic iv got a ring final circuit upstairs witch provides power to the central heating off a fuse spur when testin R1 + R2 do i test all sockets and the spur or just the sockets? thanks

also theres a garage supply comin frm a 20A circuit breaker frm the house providing power via a fuse spur 2 socket outlets and 3 light points when testing R1 + R2 do i test every point including the spur? thanks
 
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S

Spudnik

  • Thread Starter Thread Starter
  • #2
I would do the test with all sockets and the spur.

Second, if its a radial, the furthest point.
 
I

iceman

  • Thread Starter Thread Starter
  • #3
yes the sockets are on a radial circuit when i practicing i went straight to the furthest point but on the day the asseser will probley want to see me test every point :-/ lol
 
J

johnnyb

  • Thread Starter Thread Starter
  • #4
Yeh mate he will want to see everything thats relavant to that circuit, and we have ours back end of this month.
 
S

Spudnik

  • Thread Starter Thread Starter
  • #5
Just out of interest, why would he want to see the test at every point?

Edit. Duuuhhh. Just realised what i said.:D:D

Sorry, i've been out in the fresh air all day.
 
Last edited by a moderator:
I

iceman

  • Thread Starter Thread Starter
  • #6
johnnyb how long you been with the nic? would you say you get more work once registard? thanks
 
In theory you should test R1+R2 at all points, noting the highest value obtained (i.e. worst case scenario with regard to disconnection times).
 
P

Pippyboy1916

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  • #8
why would you take a R1 + R2 on a radia (R1 + R2 only on a ring)l and how can you take a R1 + R2 reading on you central heating surly it would just be a R2?
 
S

Spudnik

  • Thread Starter Thread Starter
  • #9
You take R1 & R2 on ALL circuits, radial or RFC.
 

Des 56

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Arms
Esteemed
why would you take a R1 + R2 on a radia (R1 + R2 only on a ring)l and how can you take a R1 + R2 reading on you central heating surly it would just be a R2?
Because you are measuring the possible fault path of that circuit to see if it is within the limits required
 
S

sparkswillfly

  • Thread Starter Thread Starter
  • #12
taking r1 +r2 also confirm polarity
 
A

AMST09

  • Thread Starter Thread Starter
  • #13
taking r1 +r2 also confirm polarity
Not on a radial circuit only a lighting circuit where you have switches
To confirm polarity you also need to do an R1 + RN or R2 + RN
R1+R2 or R2 values need to be taken at every point on a circuit
 
S

spark1

  • Thread Starter Thread Starter
  • #14
One point to bear in mind is that if measuring on the load side of a fcu the acceptable value will depend on the rating of its associated fuse and not the circuit protective device at the consumer unit.


spark1
 
P

Pippyboy1916

  • Thread Starter Thread Starter
  • #15
Because you are measuring the possible fault path of that circuit to see if it is within the limits required

sorry i thought you only nedd to take a R1 + R2 reading on a ring, just new to testing tho.
 
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