Tripping times for a 100mA RCD?

[HappyHippyDad]

Could anyone confirm if we test 100mA RCD's at x5?

There is a lot of information on the web that says you only test at x1 but Table 3a in appendix 3 clearly shows a max disconnection time for a 100mA RCD at x5 to be 40ms.

Thanks all.

 

[TJ Anderson]

5 x test is only for 30ma RCDs. That must be a mistake...

 

[Ian1981]

1x for a 100mA rcd.
It offers no additional protection and only needs its disconnection time confirming for compliance with fault protection

 

[Andy78]

Table 3A shows the times for tripping required for compliance with the standards they are produced to.

The requirements of BS7671 are not quite the same as the only requirement for a 5x test is for RCDs used for additional protection.

 

[Flanders]

What they all say I believe the 100ma will only prevent fire and does not protect life

 

[mhar]

When I did the 2391 I was advised that the only thing you will lose marks for is for suggesting a 5x test on anything but a 30mA rcd

 

[123]

When I did the 2391 I was advised that the only thing you will lose marks for is for suggesting a 5x test on anything but a 30mA rcd

I'd assume a 10mA RCD would require 5x test as well?

 

[Dave OCD]

Good point,although I haven't seen a MFT with that function ?

 

[Andy78]

Good point,although I haven't seen a MFT with that function ?

Really ? Have a look through the functions on yours, you might be surprised.
Mine does 10, 30, 100, 300, 500, and 1000mA all at x0.5, x1, x2, and x5 and it's a very basic model.

 

[Dave OCD]

It might be that I've never taken notice of it Andy, can't be bothered to go out to the van in the current atrocious weather to check now though. The only time I ever installed a 10ma RCD was about 35 years ago when an apprentice, it was for a Hydrotherapy pool in a centre for disabled children and back then it was a massive lump, fixed to the wall with M12 Rawlbolts.

 

[Deleted member 26818]

500mA is deemed too dangerous, so we do not test 100mA RCDs at 5x.

 

[Risteard]

5 x test is only for 30ma RCDs.

Or less... e.g. 10mA RCDs. It's if it is providing additional protection.