Cable rating

[littlespark]

I believe MICC has a higher ccc so 1.5 on 15A would be fine

 

[pc1966]

I believe MICC has a higher ccc so 1.5 on 15A would be fine

In the 'good old days' it was not uncommon for volt drop not to be checked at the design stage so MICC could well be a size or so below the equivalent plastic/rubber insulated cable and fine for CCC due to its much higher safe operating temperature, but you then had a magnificent MICC installation and the lights would dim when ever some bit of equipment was started!

On the positive side MICC will generally last forever unless seriously damaged!

 

[jonperry64]

Thank you all for your very helpful and knowledgeable responses. Apologies for my ignorance, but what is MICC and how would I tell if I had MICC? It sounds as though, if I do have MICC then 1.5mm should be OK for the 3.4kw heater. Is that correct?

 

[jonperry64]

In the 'good old days' it was not uncommon for volt drop not to be checked at the design stage so MICC could well be a size or so below the equivalent plastic/rubber insulated cable and fine for CCC due to its much higher safe operating temperature, but you then had a magnificent MICC installation and the lights would dim when ever some bit of equipment was started!

On the positive side MICC will generally last forever unless seriously damaged!

Apologies for my ignorance but what is MICC? If it is a typ

Thank you all for your very helpful and knowledgeable responses. Apologies for my ignorance, but what is MICC and how would I tell if I had MICC? It sounds as though, if I do have MICC then 1.5mm should be OK for the 3.4kw heater. Is that correct?

I just googled MICC and it doesnt look like my cable which looks like bog std 1.5mm flat twin and earth.

 

[Dustydazzler]

That’s look like 2.5 to me

 

[jonperry64]

That’s look like 2.5 to me

The flexi is definitely 2.5 but do you think the black and red cores look like 2.5 too?

 

[Dustydazzler]

Looks like 2.5 from the picture

 

[jonperry64]

Looks like 2.5 from the picture

Problem solved if it is!

 

[ElectricSeamus]

What led you to believe it was 1.5????

 

[littlespark]

It’s hard to tell from a photograph what size it is, even with experienced eyes.

can you compare it with a known size of cable cutoff? You will see the difference between 1.5 and 2.5