Which table?

[Sparky83]

Hi guys,

We have recently had some work done by contractors at our building.

Double socket in an office, fed in 2.5 FP200, on a 32a MCB.

First question is I wanted to look at the current carrying capacity for FP200 but wasn't 100% which table it is. Is it classed as mineral? Making it 4G1A

Is there anything wrong with the single double socket being protected by a 32a MCB? I personally would have put it on a 20a. But providing the current carrying capacity is more than 26a (the max the 2 sockets can pull) it wouldn't pull more than the cable can take. Hence wanting to find the table first.

And secondly can someone confirm that this should also be RCD protected. Although it's been put in for a specific reason ie a tv, it's still a double socket and could be used for anything else. The cable is not mechanically protected.

I know regulation 411.3.3 says that an exception to the fact a socket exceeding 20a requires RCD protect can be that it is used under the supervision of skilled or instructed persons, would that mean a maintenance electric on site, even though someone could use this socket any when without the maintenance guy knowing?


Hope that makes sense!

 

[pepparz]

use table 4D2A and a RCD.

 

[Spoon]

Is the circuit a ring or radial? What is the installation method? Does the cable go outside at any point?

 

[pepparz]

it goes outside when it wants to smoke.

 

[telectrix]

FP200 doesn't smoke. :45:

 

[pepparz]

right, did it give up when the ban came in? v wise.

 

[Sparky83]

It's a radial, for the most part that I can see its on basket above the ceiling and then off that into mini PVC trunking down the wall, then through the wall into the back of the socket. It doesn't go outside at all.... Not even to smoke!

 

[Zebra Stripe]

Hey softly softly catchy monkey as it were, sour grapes or just dont like your toes squashed?
Commercial building?
32 amp spur with 1 socket, maybe not that bad, but probably better on a 20amp.
RCD protection? Is it needed in this instance? Duty of care, facilities/maintenance with control of who works in the building, management and risk assessments regarding how sockets are used…so no RCD required…but hey perhaps you could get them on smoking crack in the toilets haha

 

[Farmelectrics]

change breaker to a 20amp job done merry xmas

 

[Lucien Nunes]

Is it classed as mineral?

Ha ha! It's the mineral wannabe, but it's plain old thermosetting insulation. I would always use an RCD on any 13A S/O that could be used for anything other than a very specific piece of equipment e.g. inside a rack, regardless of the level of supervision of the system, except where there is a disadvantage in doing so. Is there one here? As for 32A, without wanting to open a can of worms, which it does, I will say: "Unfused adaptors!"

 

[Sparky83]

I would agree that I would put socket on an RCD in this instance.

There is no disadvantage other than it costing a lot more buying a Schneider RCBO which ain't I too cheap.

The other socket that is empty could be used for anything and regardless of there being onsite maintenance, there is nothing stoping them plugging something else in..... Like an infused adaptor maybe

 

[Zebra Stripe]

Hey they could also plug in a vibrating owl with glowing eyes which swoops all over the place at high speed, so perhaps you could also in stall a hard hat on a bungy rope… just a thought

 

[jeremy]

What about a SO with inbuilt RCD?