Am 09.11.2017 um 16:12 schrieb whisky-dave:


Yes why is a 2KW heater only drawing 700W when fully on, if it was up to temperatury I'd expect it to disconneced with a bimetalic strip or something more advanced and would be 0W not 700W.

I would expect that too.

The radiator has 2 switches. Call them A and B. Eeach switch has two
positions. Call them 'on' and 'off'.

So 4 combinations:

C1: SW A 'off' SW B 'off'
C2: SW A 'off' SW B 'on'
C3: SW A 'on' SW B 'off'
C$: SW A 'on' SW B 'on'

What are the readings of your 'old maplin power meter' for each of the 4
combinations?