Wiring in a frost stat and IR lamp in loft

[soloheadbeg]

Hello

I'm propose to wire in a frost stat and IR lamp in the loft. There is a 2.5mm2 junction box nearby with one cable coming from the consumer unit and one going to the immersion heater. The box is rated 30A. Can I run 2.5mm2 t&e cable from the box to a fused connection unit (fused with 3A fuse) and from there form my circuit to stat and bulb and back to fcu with 1.5 mm2 cable?

Thanks

 

[londonboy]

Your immersion circuit should be a dedicated radial.

Can you not take your feed from elsewhere?

 

[MrTinker]

Why not run it off the same spur as your new light.

 

[soloheadbeg]

Pretty long cable run from new spur to IR lamp. But I think it's the best option. Many thanks.