Handy notes to keep in phone

[goasis]

Haha I don't think I've ever actually made him a tea funnily enough! (He prefers coffee)
Okay after work I'll look into the bathroom zoning. I think I got rcd trip times stapled to the brain though
5x30ma should trip at 40ms or less
1x30ma should trip 200ms or less
1/2x30ma shouldn't trip!

Nice one!
Check the changes to rcd testing as a result of ammendment 2.
Keep up the good work!

 

[Dustydazzler]

Nice one!
Check the changes to rcd testing as a result of ammendment 2.
Keep up the good work!

There was rumblings that there will be no need to trip time RCDs and only require the functional test Via the test button ?

For the now you only need do the 1 x test and get 300ms or lower

No need to do 5 x or 1/2 any more

 

[goasis]

There was rumblings that there will be no need to trip time RCDs and only require the functional test Via the test button ?

For the now you only need do the 1 x test and get 300ms or lower

No need to do 5 x or 1/2 any more

No requirement for the x5 test now. What was the theory behind the x5 test anyway?

paraphrase "RCD'S used for additional protection are deemed to have been verified where an RCD disconnects at rated residual operating current (30ms) 300ms maximum"
For non delay types

 

[Dustydazzler]

No requirement for the x5 test now. What was the theory behind the x5 test anyway?

paraphrase "RCD'S used for additional protection are deemed to have been verified where an RCD disconnects at rated residual operating current (30ms) 300ms maximum"
For non delay types

No idea , it just seemed a random test for no apparent reason. Much like half of the old tick boxes just seemed pointless exercises

 

[timhoward]

Just an idea - you might want to look at the ProCerts Electrical Tools and Reference app. It isn't that expensive (£19). I've had it for 4 years now and since the day I bought it I've (generally) not needed the on site guide or regs with me. Of course occasionally situations appear which need the full regs but for most work the app reminds me of what I need.

Electrical Tools & Reference - Apps on Google Play

THE Electricians App , electrical calculators, charts, tables, tools & guides.

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Electrical Tools and Reference

The Electrical App for Electricians, Electrical Engineers and anyone working within the Electrical Industry. This Electrical Tools and Reference App is packed full of printable electrical charts & tables, multiple electrical calculators and electrical technical guides. APP MAIN SECTIONS: -...

apps.apple.com

 

[pc1966]

No requirement for the x5 test now. What was the theory behind the x5 test anyway?

I am not sure, but possibly the old electro-mechanical sorts would take longer at low currents (the 300ms limit) but ought to be down to a short time at higher currents (where you are more likely to die), at least if not a "delay" type where 300ms is also a pass even then. So a test a 5*In would prove it worked fast / non-delay.

These days I think RCD will still trip without neutral (i.e. unpowered internal electronics) but don't know if that really would make it longer than the 10-40ms normally seen even at In testing.

If I have spare time and MTF kicking around I might try test that out,