discrimination acheived ?

[the pict]

I recently fitted an outdoor socket primarily for a midge machine, although knowing the homeowner anything may well be used on it, from the kitchen RFC on a 2.5mm T&E spur I fitted a selfcontained IP X5 clipsal unit with 25A RCD and fitted a 16A MCB, I have RCD discrimination @1X and the upfront RCD trips also @x5 which as I see it is desirable however whats the regs on this as I am going in circles prob cos I am biased
Pict

 

[Top Cat]

What the f*** is a midge machine?

Something to kill midges?

Can't be very big!

 

[the pict]

Hi yes its a midge killer turns calor into some gas that the midge loves then it dehydrates them, bit like beer actually
pull about 3A

 

[Top Cat]

Hi yes its a midge killer turns calor into some gas that the midge loves then it dehydrates them, bit like beer actually
pull about 3A

Well you learn something new everyday!:crazy:

 

[Guest123]

The OCPD is less than the maximum rating of the RCD 16<25 so that complies.

Is there a 30mA RCD protecting the kitchen RFC as well as the RCD socket???

 

[malcolmsanford]

Have a read of 531.2.9 and particularly the part about "necessary to prevent danger"

To be honest you lost me al ittle with the @1 and @5 part, but I assume you have RCDs in series, hence the reg

 

[the pict]

Yes there is a 30mA RCD on the board protecting RFC,s and Lights so yes RCD in series and sorry Malc 1x tripping current and 5 x
Pict

 

[telectrix]

so why have you gone to the trouble of fitting a second, unwanted RCD?

 

[malcolmsanford]

so why have you gone to the trouble of fitting a second, unwanted RCD?

this................................................

 

[the pict]

Well at a fault of 30mA on the outside socket only the local RCD trips no brainer really 531.2.9 like malcolmsanford said
Pict

 

[telectrix]

i stand corrected. from that, it appears to say that RCD discrimination is only required if to prevent danger.

 

[the pict]

It was a judgement call this guy is a bit of a diyer with all sorts of power tools table saw being the most dangerous and although the socket was specified as for class 2 low demand appliance I can see allsorts of stuff going in there, plus a load of work is getting done to property of his next door so I can see the local chippy, builder, gardener using it once they know its there
Pict

 

[Guest123]

As you mention it may be used for power tools etc, was it a non-latching type you fitted?

 

[the pict]

It is a non latching type, tbh I had not given that any thought till you mentioned it, slap slap one for future reference cheers lenny

 

[sedgy34]

Well you learn something new everyday!:crazy:

i have a midgit machine to wire got to be sited 430 off the floor so they dont bang there head on it as they walk past :tongue3:
slightly lower than the normal 450mm lol