Cable routing inside a consumer unit

[Andy Hames]

First of all, welcome to the forum.

However…

No SPD, they look to be 63A type AC RCD’s, looks to have single 2.5mm cables going into 32A MCB’s

surely this is a wind up?

I can’t see a sparky signing it off and you getting an LABC compliance certificate.

They're type A RCDs.
The single cable is one side of what will be a ring when completed.

My most immediate concern....(of several)
Does this:
View attachment 105842

lead to this:
View attachment 105843

as your diagram seems to imply?

It does, that cable is one end of the kitchen socket ring. The other end of the ring that's also connected to that MCB comes in from the top of the CU.

 

[davesparks]

The single cable is one side of what will be a ring when completed.

But it appears from the pictures that it is currently live?

If this is the case you need to stop and get a professional to sort this out before you cause some real damage that can't be undone.

 

[timhoward]

It does, that cable is one end of the kitchen socket ring. The other end of the ring that's also connected to that MCB comes in from the top of the CU.

It's highly dangerous to have a coil of live cable on the floor with bare ends. Final circuits shouldn't be connected up until they are complete and tested.

Also, the other B32 MCB on the left shouldn't have a single 2.5 sq mm cable either as it isn't rated to carry 32 amps. (as mentioned higher up)

 

[suffolkspark]

Wheres your spd?
How much of a gap is there around the cables that enter the top of the cu through that gromit?
Where is the support for the tails (and other cables)?
Wheres your label on the MET?
Why is there a live coil of cable on the floor?
Whos doing notification to labc?
Why is there a 32A mcb serving a 2.5mm radial for 1st floor sockets?
Wheres your test results obtained prior to energising?

 

[westward10]

I expect the 2.5 radial is still looping around the house live until it returns to the CU to complete the ring.

 

[MJPD29]

Although it appears neat, there are a lot of mistakes would need rectified to meet regulation.

 

[mainline]

Is the 32 amp 2.5mm radial feeding a socket or sockets ?

 

[Andy Hames]

It's highly dangerous to have a coil of live cable on the floor with bare ends. Final circuits shouldn't be connected up until they are complete and tested.

Also, the other B32 MCB on the left shouldn't have a single 2.5 sq mm cable either as it isn't rated to carry 32 amps. (as mentioned higher up)

No, that's not the same cable. There are 2 cables coming up through the floor. The coiled cable on the floor is the start of a separate ring and is not connected up or in any way live.

Taken on board the point about the 32A MCB, I was already intending to replace it with the spare 16A.

 

[westward10]

Are you rewiring this property.

 

[mainline]

The first thing to do is to switch off those mcbs one at a time, then turn off the CU main switch followed by the isolator.
Then check the main fuse rating if above 63 amp, disconnect the entire CU and take it back to screw fix.