r1 + r2 testing and IR at 250 volts

[DaveS]

Hi guys I have resit for 2394 Tuesday. Passed all theory but ran out of time on main part of practical which have to retake. I'm trying to look at the ways I can cut time down. I'm wondering if when testing r1 + r2 it is acceptable practice to just disconnect live conductor and and either terminate into earth bar or clamp link from live to earth bar. Alot of vids and books look at seem to deiconnect live and earth each time this will obviously take more time ? As far as I can see parallel paths shouldn't be a problem when testing like this. Also I am starting to gain some experience testing for firm at moment. An office refurb. Some of the circuits I am testing at moment consist of lights and FCU'S that may be vulnerable to 500 v. Although making sure all lights disconnected from lcms and swith in off spurs there is still room for error with this. As result been testing at 250 and getting readings of greater than 199 my question is really with readings like this can you be hundred percent sure this value is good enough and what value at a 250 v test would raise concerns. Many thanks

 

[ruston]

Hi guys I have resit for 2394 Tuesday. Passed all theory but ran out of time on main part of practical which have to retake. I'm trying to look at the ways I can cut time down. I'm wondering if when testing r1 + r2 it is acceptable practice to just disconnect live conductor and and either terminate into earth bar or clamp link from live to earth bar. Alot of vids and books look at seem to deiconnect live and earth each time this will obviously take more time ? As far as I can see parallel paths shouldn't be a problem when testing like this. Also I am starting to gain some experience testing for firm at moment. An office refurb. Some of the circuits I am testing at moment consist of lights and FCU'S that may be vulnerable to 500 v. Although making sure all lights disconnected from lcms and swith in off spurs there is still room for error with this. As result been testing at 250 and getting readings of greater than 199 my question is really with readings like this can you be hundred percent sure this value is good enough and what value at a 250 v test would raise concerns. Many thanks

The first part of your question is illustrated in the GN 3 I have, in continuity of conductors,it is the 17th but not the latest one.
A link is used. Beg or borrow the book . It will help you a lot.

Also section 10 of the on site guide covers it.

 

[Pete999]

RFCs r1r2 testing is a cinch 2 lives 2 Neutrals and 2cpcs whats the problem, or are you talking about R1+R2 there is a difference, not really a thing called r1+r2

 

[DaveS]

Sorry my mistake R1 + R2. Just referred to GN3 clearly shows ok to link out earth bar to disconnected live. Sometimes look at every other book and vid before referring to GN3

 

[ruston]

Sorry my mistake R1 + R2. Just referred to GN3 clearly shows ok to link out earth bar to disconnected live. Sometimes look at every other book and vid before referring to GN3

GN3 is your friend for what you are doing.
Read through it you will find it covers the requirements you will need.