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That IET article is from 2014.
Nothing’s changed then.
Discuss When testing a circuit protected by RCBO, do you test at the DB or furtherst point in the Commercial Electrical Advice area at ElectriciansForums.net
That IET article is from 2014.
but i think Pirate had something to do with it. all that gold jewellery on the women passengers. yo ho ho.don't blame me. i didn't put them there. and it wasn't my fault the Titanic sank.
I'm with Spin and Telsuppose you test the RCD at CU with circuits dissed. it passes with good readings. installation is then re-energised, cert. supplied, next job. however 1 circuit has a nasty N-E fault which inhibits the RCD from working. customer is electrocuted. if test was carried out at a socket, the problem would have been seen and rectified. so I'm with spin on this issue.
Incorrect premise.It’s all about why you are testing the RCD/RCBO.
If you are testing it just to see whether it works, then yes test at the most convenient point.
If you are testing to prove it provides additional protection, then test it at the point where the additional protection is required.
Not aware anyone is getting aggressive about it.
Your insulation tests would have discovered this.suppose you test the RCD at CU with circuits dissed. it passes with good readings. installation is then re-energised, cert. supplied, next job. however 1 circuit has a nasty N-E fault which inhibits the RCD from working. customer is electrocuted. if test was carried out at a socket, the problem would have been seen and rectified. so I'm with spin on this issue.
you'd think so, but IR testing with modern digital testers can be hit and miss. had several cases of trapped L conductors showing >299Meg. on test but tripping MCB when energised. also had a couple of N-E fault stopping RCDs working . tested fine, >200Meg. .as a last resort on one of the latter, i used old wind up megger. that showed 15K ohms. think it's the fact that the old wind up jobbies can push out higher current. . moral here is don't mock the oldies. (you listening pete? old school beats the new tech.... hands down).Your insulation tests would have discovered this.
I'm with Vortigern on this.I think H&S and supporting statutes have something to say on this. Strictly speaking getting up a ladder to test lights is a no no in some commercial places I have been in. And opening a CU is working on something live which we should not be doing if there is a safer way to work i.e. at a socket or light switch. Therefore not at the CU with cover off then?
Agreeyou'd think so, but IR testing with modern digital testers can be hit and miss. had several cases of trapped L conductors showing >299Meg. on test but tripping MCB when energised. also had a couple of N-E fault stopping RCDs working . tested fine, >200Meg. .as a last resort on one of the latter, i used old wind up megger. that showed 15K ohms. think it's the fact that the old wind up jobbies can push out higher current. . moral here is don't mock the oldies. (you listening pete? old school beats the new tech.... hands down).
I just test at the point that is easiest for me.I always test at the furthest point with RCBO's, just do.
I just press the test button, am i doing something wrong then?
So a device that is;-
Arc fault detection
Residual current
Surge protection
Equipment
Sounds like a bit of a pain in the A.R.S.E
I have an old "hold the button and what the needle does" IR & resistance tester that dad picked up when it was being ----ed out at work. In my rental flat, I can use that to test the whole installation for IR as it will provide voltage for long enough to charge caoacitance (eg in PIR lights that are inconvenient to disconnect) - but MFT simply doesn't apply voltage for long enough and gives random results.i used old wind up megger.
I'm with Spin, Tel and PeteI'm with Spin and Tel
100% agreeRidiculous change to the regs IMHO! A working 100mA RCD will pass as a 30mA one.
sure that's not 30%?100% agree
No the people popular front.........and i thought YOU,were the popular front of Judea...
No the people popular front...
no, i'm with the Judean Mafia. we gave Brian an offer he couldn't refuse, but he got a bit cross.......and i thought YOU,were the popular front of Judea...
Reply to When testing a circuit protected by RCBO, do you test at the DB or furtherst point in the Commercial Electrical Advice area at ElectriciansForums.net
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