question Ampere gauge i.d.

[Rick W]

Another i.d. required tonight. A fairly heavy and substantial Amperes gauge. It feels like it should me for an MV/commercial/aircraft given its weight. About 20 cms in diameter, 2 bolt holes on base. No obvious markings apart from what you can see.

[Simonl]

Could be from a control panel or a generator set but it's a typical early Amp meter and could have come from any electrical supply board but not from a vehicle dash panel.

[marvinthemartian]

It looks to me to have an old railway/steam train appearance.

[Chris Suslowicz]

8" diameter is a bit big for a mobile application! Also, it's marked as "Moving Iron" so is intended for AC use. I would suspect it's for a large generator set or a power distribution switchboard in a factory. I remember seeing something similar on the motor control boards for the mill lines at Fort Dunlop back in the 1970s. (The machinery went back forever, being made by Armstrong Whitworth and Vickers (etc.) with cast-in dates of 1919, and the No.3 Calender that was commandeered by the War Office (from a carpet factory in Kidderminster, apparently) to increase production for the war - it was still in use in the 1980s, by which time depreciation had given it a book value of £0.75 - and a replacement cost of £4M - I noticed it on a Plant Inventory printout and boggled a bit.) The motors (driving 2 - 3 rolling mills that mixed the compound) ran on 2000 volts at around 20 amps (probably per phase) and were about the size of a transit van (from my fairly flaky memory).