Smart controller wiring

[gbrown100]

I have a bunch of smart controllers from Shelly designed to sit in the back of a socket backbox. Some have a rating of 8 amp, some 13. I wanted to use them to switch and monitor consumption of a bunch of 3D printers, one per socket. I have a 6KVA UPS being installed using a 16 amp radial input from the Consumer Unit and output as 16 amp radial also. My confusion lies over the rating of the smart controllers, neither are rated to 16/20 amp so would not be able to be connected directly to the in/out of the radial circuit as it passes through (i.e. as you would if just installing in a bunch of sockets). Also, since I guess they themselves are classed as devices shouldn't they have an isolating switch also?

I worry that there's no safe way to install these devices, what are your thoughts? Is jointing using Waygo's and feeding the controllers from those also safer and allowed?

Thanks

Graham

 

[jj4091]

Connect the 8A ones using FCU's and fuse them appropriately. The 13A ones will be OK in normal 13A sockets.You don't need Isolating switches for the devices.

 

[gbrown100]

Thanks @jj4091 . The concern is that even the 13 amp ones, the terminals don't seem man enough to cope with anything over 13 amps, if wired as part of a 20 amp radial could the terminals get too hot if they're being used to connect between the cable segments for the circuit and its running close to capacity?

I mean the devices plugged in shouldn't be drawing anywhere near that much unless something goes wrong but with 3d printers that's a distinct possibility!