phase

Hi, I have an old tatty Eberle thermostat that I never use. It's connected to the plinth heater in the kitchen. It would be nice to replace with something newer, but I'm not sure about the logic with the current wiring. It seems to be 3 phase without neutral so red, blue, yellow and earth...

Just moved into a new rented flat in Zurich and as is common most of the light fittings have been removed (?!) [previous renter was British] I bought a contactless tester, to check out wiring. We've since had a local sparks check things and fit some new lights, but I was surprised by what I...

I know you can find reactive power out from the alternative formula below, but using the formula "P(W) = V(V) × I(A) × cos φ", how do you obtain the complex power phase angle (φ) from knowing the Voltage, Power and Current? Alternative formula: Reactive Power=√ (Apparent Power²– True power²)...

This article here suggests that the colour of the 3rd line conductor in the EU (and thus also in the UK) is purple! :eek:o_O Is this a simple editing mistake :?: as I am hoping, or can purple wires really be used in place of grey wires for 3rd line/phase conductors to my horror? o_O:cautious...