great, i didnt know these existed either. In my new house theres only one outlet in the three bedrooms so these will be ideal for me I'm only referring to Appendix 15 of BS 7671, RFC arrangements. Which refers to appliances such as cookers, ovens & hobs and recommendations. However, any appliance above 2kW may cause thermal damage if used in conjunction with BS 1363 accessories, if used to their limits.

Dencon 4 Gang Switched Conversion Socket Electrical World

Any cooking appliance over 2kw is recommended to have its own radial to prevent the rfc being subjected to prolonged loads. Assuming your in the U.K. The circuit your plugging into will most likely be 32A max, quite possibly less. 4 x 2.4kw is nearly 42A so your solution won't work either way. So, in answering #14, I would consider connecting 4 x 2400W (assuming the OP lives in UK, and whatever 'mining gear' is) as a bad idea, both for the RFC and BS 1363 accessories. Appendix 15 is an informative appendix, making recommendations about ring & radial final circuits. Fig 15a makes recommendations for RFC's. Suggesting the load current should be unlikely to exceed for long periods the ccc of the cable, and refers to reg 433.1.204. It makes reference to cooking appliances, it also advices against connecting immersion heaters or loads of a similar profile. Ideal for places where extra outlets are required. Impact-resistant with polycarbonate front plate and white plastic finish. 13A fused. Suitable for flush mounted box.Designed to fit into an existing or new single or double 25mm deep metal or dry lining box in your wall. This reads as you replace the outer of a2gang which is sunken base and wire in to new base to make a 4 gang with no need to to make bigger hole in wall