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be sure that the fuseboard cover is on when u are trying to determine whether the switch is "off or On" some switches (ie wylex old boards) have a sliding labe; which if the switch it 'pointing to off' with the cover off the board, it is 'on' as the slider label would display the word 'on'...

50v and 25v alert is feature of Megger and fluke (and maybe other testers) ... to alert you the installation raises to above 'safe touch voltage(50v in house, 25v construction/argicultural) ... so i dont think it can be turned off

ok, thanks for the help

NICEIC forms have Max Disconnect Time on, aswell as max Zs for disconnection in that time .... im just trying to get the max times sorted so basically its either 5 secs or 0.4 secs in houses, whether its protected by RCD or not ive been writing 0.04 for a while, because i had it in my...

On tests sheets when you fill in maximum disconnection times allowed ... 5 Secs for lights etc non-portable fixed equipment 0.4 secs sockets supplying handheld equipment 0.2 (200ms) - for 30mA RCD protected circuits, sockets that could easily supply outdoor portable equipment Is...

yeah true, but he doesnt want to do that :P

i thought trunking is 45% space factor ... meaning u can fill 55% of it :?

bet u do :lol: i use mine alot, mines a fluke volt alert useful as initial check to see if you switched correct breaker off etc, but wouldnt trust it as definate ... like others said use multimeter or something to ensure its dead

ive only been done on capacitance so far , but that hurts enough :P did do it to my mate by accident though and he shouted a little :P

doing IR :P

hmm pain in the bum leads are :(

the factor of 3 ... is that why we use 100mA time delayed on TT ? something strange we found recently .. Contactum dont make time delay RCDs :? is time delay a requirement on TT or is it just better practice to have one? ... to prevent lighting circuits going down (this would be a hazard...

ye thats what i thought, but its not how it reads on that table and then i thought, why not just write 300-400 if its not different for other ratings of RCD ?

doesnt the RCD say a rated time delay on it ? if not... god knows

so you can not do a low current earth loop test with only two probes (live + earth) and not trip RCDs with the MFT1552 ? :oops:

http://www.iee.org/Publish/WireRegs/WiringMatters/Documents/Issue15/2005_15_summer_wiring_matters_inspection_and_testing_rcds.pdf page 3 of 5... says 4293 was replaced by 61008, so should be same as requirements for 61008 S type but ... page 5 of 5 gives the actual trip times required

What is the problem ?

no ? :cry:

TN-C-S should not require/have an earth rod, as the earth is supplied by the Electricity supplier, via the Neutral conductor (Protective Earth & Neutral combined) If you have had a recent Periodic inspection carried out, then you should be able to make reference to External earth loop...

This should probably be in another place on forum, but wanted response from electricians... sorry At work we have a Megger/AVO CM500 , which is pretty good tester in my opinion. It tests earth loop with just two probes (no neutral needed) ...only prob is we need another tester and the CM500...