RCD Fail, or Not?

[steamboatwilly]

Folks,

New shed CU, 16A & 6A MCBs with integral 30mA RCD main switch. RCD test at 1x is >400ms tho' 180 degree test ok at 18.6ms. That's a fail though yes? Max measured time being >400 ms.

Just asking....don't get RCD fails often.

Cheers!

 

[ian.settle1]

Yep it's failed

 

[steamboatwilly]

Yep it's failed

Yeah, figured so....THANKS!

 

[willosparky]

must be no longer than 40mS

 

[Sintra]

must be no longer than 40mS

That's for 5X test.

 

[willosparky]

and less than 200mS at 1 x

 

[steamboatwilly]

and less than 200mS at 1 x

...and latterly 300ms.....all the same, it's KAPUT

 

[pevvers]

Yes, 200ms for BS standards, and 300ms for BS EN standards as far as I'm aware, for the 1x test obviously.

 

[Phil Mumford]

No neutral - earth faults? They give you false results !

Sticky RCD's are common too. Test once, fail. Try them again and they pass ! So much for the three monthly testing.....