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A) Proteus is cheap S***
B) You need ferrules on the end of those neutral fly leads.
C) I don't like to see cable ties holding conductors together in a CU

Although at a quick glance aside from the above. Looks ok
 
Top row, there’s a 16A in between 6A.
Personally, I like to have descending sizes from the main switch.
Bottom row needs more blanks if top and bottom are same number of ways.

Speaking of the mainswitch.... there’s no tails connected yet. Post another photo when they are in and we will constructively criticise then.

Where do you get white t&e that looks like Sky shotgun cable?
 
A) Proteus is cheap S***
B) You need ferrules on the end of those neutral fly leads.
C) I don't like to see cable ties holding conductors together in a CU

Although at a quick glance aside from the above. Looks ok

Also could you expand a little on B about the cable ties. I used that for aesthetically purposes.
 
Also could you expand a little on B about the cable ties. I used that for aesthetically purposes.

Ok so for point B regulations:

526.9 Connection of multiwire, fine wire and very fine wire conductors

526.9.1 In order to avoid inappropriate separation or spreading of individual wires of multiwire, fine wire or very fine wire conductors, suitable terminals shall be used or the conductor ends shall be suitably treated.
526.9.2 Soldering (tinning) of the whole conductor end of multiwire, fine wire and very fine wire conductors is not permitted if screw terminals are used.
526.9.3 Soldered (tinned) conductor ends on fine wire and very fine wire conductors are not permissible at connection and junction points which are subject in service to a relative movement between the soldered and the non-soldered part of the conductor.

The cable tie, is purely my opinion, use them to make it tidy and then I would remove, the cables should have been formed into position.

I don't like it as in older bigger DBs with more circuits, especially ones that have been poorly terminated, it's a pain in the --- trying to trace a wire when they're cable tied.

Other people will argue it's not a good idea, as you're bunching conductors together and could potentially cause a hot spot.
 
Ok so for point B regulations:



The cable tie, is purely my opinion, use them to make it tidy and then I would remove, the cables should have been formed into position.

I don't like it as in older bigger DBs with more circuits, especially ones that have been poorly terminated, it's a pain in the --- trying to trace a wire when they're cable tied.

Other people will argue it's not a good idea, as you're bunching conductors together and could potentially cause a hot spot.

Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.
 
Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.

They are fine stranded conductors... (fine wire)

526.9.1 In order to avoid inappropriate separation or spreading of individual wires of multiwire, fine wire or very fine wire conductors, suitable terminals shall be used or the conductor ends shall be suitably treated.

Those terminals in the CU are not spring loaded, so the conductor must be suitably treated. E.g ferruled.

From the factory you will likely notice that the ends before you cut them are ultrasonically welded.
 
Ok so for point B regulations:



The cable tie, is purely my opinion, use them to make it tidy and then I would remove, the cables should have been formed into position.

I don't like it as in older bigger DBs with more circuits, especially ones that have been poorly terminated, it's a pain in the --- trying to trace a wire when they're cable tied.

Other people will argue it's not a good idea, as you're bunching conductors together and could potentially cause a hot spot.

Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.
They are fine stranded conductors... (fine wire)

526.9.1 In order to avoid inappropriate separation or spreading of individual wires of multiwire, fine wire or very fine wire conductors, suitable terminals shall be used or the conductor ends shall be suitably treated.

Those terminals in the CU are not spring loaded, so the conductor must be suitably treated. E.g ferruled.

From the factory you will likely notice that the ends before you cut them are ultrasonically welded.

Thanks a lot been a great help
 
Thanks for the reply. I had a read over that regulation you supplied but can’t see how it applies to the neutral fly leads. I would rather not have to go back and install Ferrules. Time consuming. I will if it’s a legal requirement.

If you don't fit ferrules some of the strands will not make proper contact in the terminal as they are pushed out sideways by the screw.
This leads to overheating and you will be back to replace the higher rated/loaded RCBOs because that connection has failed.
 
If you don't fit ferrules some of the strands will not make proper contact in the terminal as they are pushed out sideways by the screw.
This leads to overheating and you will be back to replace the higher rated/loaded RCBOs because that connection has failed.

Also copper creep.

This is more prevalent on larger cables than these, but it does still happen.
 

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