neutral wire

Hi All, I purchased a Moes 1 Gang smart switch (no neutral). Switch is installed and working fine with my led fitting without the supplied capacitor installed. My question is: Is it essential to install the capacitor at the fitting if the lights aren't flickering at all or is it ok to use...

The 15 year old 50 Amp DP Pull Cord ceiling Switch for my bathroom shower stopped working this morning. On internal inspection a crack ran through it. I tested the live and neutral wires and found both the black neutral and red live wires lit up my live wire detector screwdriver. Should there be...