TESTING R1 + R2 garage supply

[iceman]

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

 

[Spudnik]

I would do the test with all sockets and the spur.

Second, if its a radial, the furthest point.

 

[iceman]

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

 

[johnnyb]

Yeh mate he will want to see everything thats relavant to that circuit, and we have ours back end of this month.

 

[Spudnik]

Just out of interest, why would he want to see the test at every point?

Edit. Duuuhhh. Just realised what i said.

Sorry, i've been out in the fresh air all day.

 

[iceman]

johnnyb how long you been with the nic? would you say you get more work once registard? thanks

 

[professional]

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).

 

[Pippyboy1916]

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?

 

[Spudnik]

You take R1 & R2 on ALL circuits, radial or RFC.

 

[Des 56]

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

 

[Spudnik]

And cpc continuity

 

[sparkswillfly]

taking r1 +r2 also confirm polarity

 

[AMST09]

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

 

[spark1]

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

 

[Pippyboy1916]

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.