UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Quick-and-dirty testgear: mains voltage monitor.

G6Tanuki · 1st Oct 2018, 9:27 pm

I've fitted one of the little displays alongside a dual 13A outlet in my 'office'.

The front-plate and 25mm back-box are standard MK items bought from Screwfix. Though in the past people have reported problems drilling Bakelite faceplates using traditional twist-drills, I had no problems at all using a flat 'woodworker' bit to drill both the main hole and that for the fuse-holder. [I decided that since the sockets are fed from a 40A RCD down 6mm T&E it might be wise to introduce some local current-control].

And yes, 250V on the display is +/- 1% correct. I've got a dedicated 3-phase 100A supply here, connected direct back to the 33KV substation a couple of hundred yards away. Happiness is a low loop-impedance...

--
G6Tanuki. The Future's Bright; The Future's Otter!

1st Oct 2018, 9:27 pm	#39
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 14,007	Re: Quick-and-dirty testgear: mains voltage monitor. I've fitted one of the little displays alongside a dual 13A outlet in my 'office'. The front-plate and 25mm back-box are standard MK items bought from Screwfix. Though in the past people have reported problems drilling Bakelite faceplates using traditional twist-drills, I had no problems at all using a flat 'woodworker' bit to drill both the main hole and that for the fuse-holder. [I decided that since the sockets are fed from a 40A RCD down 6mm T&E it might be wise to introduce some local current-control]. And yes, 250V on the display is +/- 1% correct. I've got a dedicated 3-phase 100A supply here, connected direct back to the 33KV substation a couple of hundred yards away. Happiness is a low loop-impedance... -- G6Tanuki. The Future's Bright; The Future's Otter! Attached Thumbnails