earth leakage tumble dryer

[chrisreid186]

hi guys

tumble dryer is tripping the rcd ,tested the rcd 0.5, x1 and x5 all worked out ok, even ran a extension lead from the house to the tumble dryer (normally fed by sub-main in outhouse) turned on and tripped the rcd in the house,

1) now i was wondering if there was a way to measure the fault current, maybe by connecting a ammeter to the earth at the plug and the metal casing? any ideas ??

2) also does anyone know why when you test at x5 it normally knocks out the main C.U rcd rather then the sub main from which you are testing

cheers in advance

 

[keniff]

What tester u using? Try a ramp test on the rcd?

 

[AlanWirral]

Yeah ramp test would comfirm any problems with the RCD

In regards to the Main RCD question they both must be 30ma?? I assume the one with the lower tolernece will go first.

 

[telectrix]

IR test the tumble dryer. a common problem is the thermal overloads situated above the heater element. the connections overheat and snap off, causing an earth leakage or even a short circuit.

 

[chrisreid186]

cheers guys