Why are RCDs so massively over-expensive?

[treezleef]

Thanks, but a type B RCD , that can detect 30mA imbalance, and >6mA DC, is way more than £30

Type B RCD / RCCB 40A for EV Charge Point Installations. 2 pole, single phase, 30ma. 40 Amp

Type B RCD for EV charge point installations to meet latest 18th edition wiring regulations. 40A, 30ma. 2 pole (1p + N) for Single Phase installations, 54mm in width (takes up 3 standard slots/ways in a consumer unit) Rated for up to 40A, Breaking point 10kva AC and DC leakage protection, see...

shop.evchargersdirect.co.uk

 

[Electrics]

Weird trolling.

 

[Simon47]

Thanks, but a type B RCD , that can detect 30mA imbalance, and >6mA DC, is way more than £30

Ah, the old "shift the goalposts" technique. In your original complaint you said "All existing offtheshelf RCDs are ...".

 

[treezleef]

Thanks, but the original post does say, admittedly at the bottom.....

(this is for a sensor which will detect 30mA imbalance current in 32Arms wires...and also detect 6mA DC and more.

...but yes, my apologies, as that bit should really have been at the top...i will edit the OP. Thankyou for spotting it....just tried to "EDIT" it, but it wont let me, too long after the event. Do apologise for that. That line should have really been at the top.

The OP does also say...

They must detect >30mA of imbalance current (between line and neutral) , and 6mA or more of DC "leakage" current.

...but yes, you are right, that bit of wording , that you kindly pointed out, was not intended

 

[telectrix]

could you not have a hammer on a magnetic pendulum that an imbalance will cause the pendulum to deflect and the hammerhead hit a OFF button? cheap as chips.

 

[timhoward]

I mean, if 'don't touch the busbars' is OK in an art gallery, surely a talking RCD is OK in a DB?

The day a toilet started talking to me on a Virgin Pendolino train I think the rules got torn up, anything goes.
I quite like the idea of the consumer unit shouting “you idiot” or “buy a new cooker element”

 

[pc1966]

Pages 7-9 of this are worth reading:

https://download.schneider-electric.com/files?p_Doc_Ref=998-20482406_GMA-US&p_File_Ext=

In particular the requirement from the EN 62423 standard for power-free tripping.

Another useful document (not specifically this thread) is this one:

https://download.schneider-electric.com/files?p_enDocType=Catalog&p_File_Name=CA908066E+%28web%29.pdf&p_Doc_Ref=CA908066E

Pages 25-27 have useful guidelines for leakage currents for many appliances if ever wondering "How many devices can I connect?"

 

[mattg4321]

School holidays are nearly over thankfully

 

[DPG]

Great thread. We need some humour to cheer us up.

 

[treezleef]

Here's something to cheer everyone up.....

Electricians in and around London are taking £96 per hour at the moment...mostly installing EV points....

....listen to 23:41 onwards for the £96 per hour statement