Junction boxes size

[Fab.elec]

Good morning,

i'm trying to find information about how to calculate junction boxes sizing by uk regulations. Can anyone help, please?

Best regards

 

[Tony S]

There are no regulations that I’m aware of.

Common sense has to be used to gauge ease of access to terminals.

 

[ProDave]

Every junction box has a manufacturers current rating.  You use the one appropriate to the circuit and the load it is supplying.

 

[Evans Electric]

We presume you're talking about domestic  J/Bs   for connecting twin /earth  ?    

Don't think anyone "calculates "  for a  J/box  ....as Dave says  , suit it to the load of the circuit .    

We have a 30 A   circuit , what size J/B do I need ?

1)  6A ?

2) 10A?

3) 15A?

4) 20A?

5)  30)?

6) 60A ?

 

[kerching]

I thought box sizing was a Yank thing?.....well,it is for back boxes