0.5mm T&E cable now available.

[John-SJW]

The MCB is not there to protect the plug or the socket.

It can be for sure. An added safety level.
Have a 3A mcb and a few 5A round pin lighting sockets and plugs, supplying table lamps with 0.5mm flex plugged into the 5A sockets, then the 3A mcb covers it all.

 

[DPG]

It can be for sure. An added safety level.
Have a 3A mcb and a few 5A round pin lighting sockets and plugs, supplying table lamps with 0.5mm flex plugged into the 5A sockets, then the 3A mcb covers it all.

The same thing (ie lighting connected to 5A sockets) is commonly done already with 1mm cable and 6A MCBs. The 0.5mm flex offers minimal advantage and possible disadvantages as discussed.

 

[John-SJW]

Certainly seen 1mm T&E in 80s installation.

I had neevr seen it installed or for open over the counter sale until around 10 years ago. That does not mean it was not there.

 

[DPG]

I had neevr seen it installed or for open over the counter sale until around 10 years ago. That does not mean it was not there.

It was certainly there.

 

[John-SJW]

Rule of thumb means absolutely nothing as there are many thumbs with alleged rules hanging from them.

When it came to lighting in domestic houses rule of thumb was paramount - 1.5mm was used with few even thinking of using anything else.

 

[brianmoooore]

I had neevr seen it installed or for open over the counter sale until around 10 years ago. That does not mean it was not there.

I've been using 1.0mm2 T&E for domestic lighting circuits since metrication, and have never come across 1.5 installed by anyone else in 'normal' houses. The only time I've used 1.5mm2 is in very large houses where VD, etc., come into consideration.
Local wholesalers have always had pallets of 1.0mm2 T&E on the floor, but only a few reels of 1.5 on the shelf.

 

[westward10]

When it came to lighting in domestic houses rule of thumb was paramount - 1.5mm was used with few even thinking of using anything else.

Rule of thumb is not a correct method for circuit design what is 'paramount' is correct circuit design based on many factors.

 

[7029 dave]

I've been using 1.0mm2 T&E for domestic lighting circuits since metrication, and have never come across 1.5 installed by anyone else in 'normal' houses. The only time I've used 1.5mm2 is in very large houses where VD, etc., come into consideration.
Local wholesalers have always had pallets of 1.0mm2 T&E on the floor, but only a few reels of 1.5 on the shelf.

I was using 1mm T&E in 1979

 

[brianmoooore]

Metrication was an amendment to the 1966 14th edition, issued in 1970, so I presume I've been using 1.0mm2 since around then.

 

[7029 dave]

Metrication was an amendment to the 1966 14th edition, issued in 1970, so I presume I've been using 1.0mm2 since around then.

Older than me Brian lol

 

[brianmoooore]

Just looked at the inspection certificate in the 14th. Two A5 pages, and half of one of those is space for the inspectors name and address.
Those were the days!

 

[John-SJW]

Rule of thumb is not a correct method for circuit design what is 'paramount' is correct circuit design based on many factors.

You are giving an opinion. The fact is that rule of thumb was the normal for domestic lighting cable sizing in using 1.5mm. Few ventured away from that size.

Most of the time lighting cable was vastly oversized.

 

[DPG]

You are giving an opinion. The fact is that rule of thumb was the normal for domestic lighting cable sizing in using 1.5mm. Few ventured away from that size.

Most of the time lighting cable was vastly oversized.

I would say that you are giving an opinion also. Unless you have facts and statistics from across the UK with which to back it up.

 

[westward10]

You are giving an opinion. The fact is that rule of thumb was the normal for domestic lighting cable sizing in using 1.5mm. Few ventured away from that size.

Most of the time lighting cable was vastly oversized.

It is an opinion based on fact whilst rule of thumb is based on what exactly. Using 1.5 for domestic lighting circuits is not the norm as I have already stated 1.0 has been in use for at least fifty years. What are you basing your 'opinion' on.

 

[John-SJW]

I've been using 1.0mm2 T&E for domestic lighting circuits since metrication, and have never come across 1.5 installed by anyone else in 'normal' houses. The only time I've used 1.5mm2 is in very large houses where VD, etc., come into consideration.
Local wholesalers have always had pallets of 1.0mm2 T&E on the floor, but only a few reels of 1.5 on the shelf.

I moved into a new developer house in 2001 - I am not there now. All houses were wired in 1.5mm lighting. Until LEDs became the norm, I have never come across any new build or rewire using 1.00mm lighting cable. Not one. I am not making this up. Your experience is 100% the opposite of mine.