How do you test r1+r2? Any tips on doing it faster

[egginyourface]

Evening all,

When testing r1 + r2 do you connect live to earth bar, link it at the end of the circuit or do you have someone at the end helping you?

whilst testing Today I was wondering is there a quicker way to do it apart from the long lead method as I prefer r1+r2

 

[Nivag316]

Radial or ring circuit?

 

[Des 56]

Piece of cable with 2 crocodile clips.one on the earth bar,one on the bus bar .switch on the mcb that is being tested. you get your reading and check your labelling at the same time

Next circuit,off with one mcb,on with the next and not a screwdriver in sight

 

[tbs1983]

Guidance note 3, pages 34-35

 

[bigbaddave]

Personally Put a temp link in the earth bar and then seperatly connect the live off the radial to it and retest..

 

[Sintra]

Get an apprentice lol.

 

[Guitarist]

Long lead method? You must be a glutton for punishment....
30cm length of 1.5mm 3-core flex with all cores connected to a croccy clip at each end gives you negligible resistance. Clip one end to the line conductor you are testing and the other end to the earth rail (with cpc connected). Now you can test R1+R2 effortlessly at each point.
Seriously, get yourself a copy of GN3.

 

[egginyourface]

I was thinking about the crocodile clip methods as it would speed things up. Only problem is energising circuit whilst its still comnected.

I usually link live into earth terminal but hate doing this for some reason.

 

[tbs1983]

They sell them croc clips on ebay in packs of 10 for next to nothing. Just remember to test resistance of lead and deduct it from your r1 & r2 reading.

 

[egginyourface]

Your right I do punish myself. Lucky I'm still a young man as I can take it.

 

[DJ Ovengloves]

Then don't

I was thinking about the crocodile clip methods as it would speed things up. Only problem is energising circuit whilst its still comnected.

I usually link live into earth terminal but hate doing this for some reason.

 

[egginyourface]

I'm a bit overly carfeul when it comes to testing. Think it's time for a chabge

 

[Geordie Spark]

Long lead method? You must be a glutton for punishment....
30cm length of 1.5mm 3-core flex with all cores connected to a croccy clip at each end gives you negligible resistance. Clip one end to the line conductor you are testing and the other end to the earth rail (with cpc connected). Now you can test R1+R2 effortlessly at each point.
Seriously, get yourself a copy of GN3.

What's afoot???

 

[Guitarist]

They sell them croc clips on ebay in packs of 10 for next to nothing. Just remember to test resistance of lead and deduct it from your r1 & r2 reading.

With the lead I suggest, there is absolutely nothing to deduct

 

[telectrix]

Piece of cable with 2 crocodile clips.one on the earth bar,one on the bus bar .switch on the mcb that is being tested. you get your reading and check your labelling at the same time

Next circuit,off with one mcb,on with the next and not a screwdriver in sight

don't like that. any resistance within the MCB will give false readings. i take the L out of the MCB and clip from the cable end to the E bar.