Blamed for a faulty freezer

[davetheglitz]

^+1This prevents any cable capacitance/inductance influencing the readings.

Just a thought - but the place where you want an RCD to trip is at the outlet - not the source. If the cable inductance/capacitance influenced the readings and dropped things out of spec - not that I believe it's significant - you wouldn't know about it.

 

[Sidewinder]

DTG,

Yes you are correct in that statement, however, RCD tests should be done at source.

The cable characteristics are actually negligible with the current used to test an 30mA RCD.

However, capacitive "features" can be an issue, coupling being one.

 

[Andy™]

Just a thought - but the place where you want an RCD to trip is at the outlet - not the source. If the cable inductance/capacitance influenced the readings and dropped things out of spec - not that I believe it's significant - you wouldn't know about it.

i agree with dave here

there have been known cases (discused on this forum), where certain connected loads have stopped an RCD operating.

if this is a problem, then testing in isolation at the board to get it to trip is the same as pouring salty water/other on an earth rod to get an acceptable reading.

at the end of it, you would be leaving an installation with a non-operational RCD. something i wouldnt do

 

[davetheglitz]

[quote name='Andy

 

[binky]

[quote name='Andy

 

[mikep]

why not contact the manufacturer of the fridge and ask their tech department !! that will tell you one way or another.

Mike.