Hello, Can I have some advice please? I'm replacing a big old ****-off Rangemaster oven, which runs off it's own 60amp feed, with the following: 2 x 3.6 kw Ovens 1 x 7.4 Induction hob All 3 items need to be hardwired. At the moment, there is a nice big rotary isolator in between the 60amp box and the cooker. My questions is: Can I simply put in a junction box after the isolator and split the feed to 3 Cooker Outlet Plates - 1 double for the 2 ovens and 1 single for the hob? Thanks
Would say no. Cables feeding said appliances would require 16mm cable . Put in small consumer unit fuse down ect ect
My thoughts are, as its such a hefty supply, and you have a decent size cable, you can very easily run all three appliances off the circuit. You would struggle to find a junction box rated at 60A so my suggestion would be to install a dual cooker outlet plate and connect that to the 16mm2 T&E and then wire off that in 6mm2 T&E to a single cooker outlet next to it. Wire the two ovens off the dual outlet and the hob off the single.
Fixed load situation, Ben. It's probably the physical connection of 3 x 6 in the terminal that will be a challenge.
Fault current will be the same irrespective of the cable size. Its more an overload problem. The cable won't overload because the load is fixed. Short-circuit would easily pop the 60A breaker.
The short ctt. will for sure pop the breaker but the let through energy of a 60 a breaker, I would imagine, would be more than the 2.5mm cpc is designed for.
Henley block is designed for “double insulated” cables like meter tails. We don’t know what sort of cable is envisaged. You cannot connect T&E to a Henley block in a compliant way, because the outer sheath must be inside the enclosure where the joint is made.
I did consider that issue hence the trunking idea. Perhaps put the Henley blocks in an enclosure.. Or just use three of the metal connector blocks, often used for main bonding, fixed in an adaptable box. 16mm in one entry and three sets of 6mm singles exiting via round conduit.
Or maybe enclose the Henley inside a box? Take the cables in through glands. It could be designed with thought.