10 20 or 30 amp switch?

[Deansplit]

I'm buying grid switches to enable dimming so understand I need a dimmer at one point of the existing circuit which is currently controlled at 3 points. I know I need an intermediate but they come in 10, 20 or 30 amp! Which do I need?

http://www.tlc-direct.co.uk/Products/VL103SS.html

 

[bernardgreen]

Unless I am mistaken

10amp @ 230 volts is a maximum load of 2.3 Kw
20amp 4.6 Kw
30amp 6.9 Kw

Lots of lighting

What is the rating of the fuse / MCB protecting the circuit ?

 

[Taylortwocities]

What is the CPD for the circuit? If it is 40amp you'll need a switch that xan handle at least 40amp.
If it's a lighting circuit, the CPD may be 6 or 10amp so your switch will need to be at least that value.

 

[sparkwright]

I can't see a 30 amp intermediate switch on that site.

10 amp switches would be usual for a lighting circuit.

What size fuse or circuit breaker protects the lighting circuit?

 

[ericmark]

Although BS7671 does say up to 16A for lighting it also says to manufacturers design and most ceiling roses are designed for 6A so in most cases as long as the items used can work with 6A or above they are OK for lighting.

 

[ban-all-sheds]

I'm buying grid switches to enable dimming so understand I need a dimmer at one point of the existing circuit which is currently controlled at 3 points. I know I need an intermediate but they come in 10, 20 or 30 amp! Which do I need?

I'm buying furniture to enable housing and supporting some hi-fi and TV etc equipment.

I've got a TV weighing 6kg, and I know I need a table for it, but they come in ones which can support 10, 20 or 30kg! Which do I need?

Dean - your question shows that you are so muddled about the most fundamental things that you really should not be doing circuit design work.

Please get an electrician.

 

[Stoday]

I've got a TV weighing 6kg, and I know I need a table for it, but they come in ones which can support 10, 20 or 30kg! Which do I need?

A table that takes 3kg will be good enough for you then BAS.

Gravity on Mars is only 38% of that on Earth.

 

[securespark]

Surely you can use a 6A switch on a circuit with a CPD > 6A?

And a pendant rated 6A the same?

In both cases as long as the load on each is 6A or less.

It's like 13A sockets, the CPD is not 13A, but the load on the accessory should be limited to 13A.

Like 2A sockets on a lighting circuit: the sockets are rated to 2A, but the CPD is likely to be higher.