Lighting circuit junction boxes?

[Spook]

Just been fiddling around in my loft replacing a section of damaged cable and I noticed that in the original installation, or maybe in subsequent additions, both 5 and 10 amp junction boxes have been used on the upstairs lighting circuit - which is a mix of loop-in and junction box wiring servicing six pendant lampholders (including one downstairs as part of the landing/hallway two way switching). Does this matter? Are there situations where you use one instead of the other? I was under the impression you used 5 amp boxes on a lighting circuit.

Cheers.

Spook.

 

[Lectrician]

To be honest, 5 and 10amps would be hard to come by......in fact, I have never seen them.

Most wholesalers sell 4 terminal 20amp joint boxes, and 3 terminal 30amp.

The 20amp ones get used for lighting circuits.

The larger the current rating, the more it can carry. And as your loading will be no higher than 5amp, a joint box with a rating in excess of this is what you want.

 

[Spook]

To be honest, 5 and 10amps would be hard to come by......in fact, I have never seen them.

I've never seen 10 amp - but then I suppose I've never looked for them. Screwfix sell 5 amp though.