WHY a Double Pole Switch..? The lines mains switch or double pole switch in a consumer unit it designed to switch off both line and neutral… but WHY..? Videos are training aids for City and Guilds (C and G) and EAL courses Level 1, 2 and 3. You can follow me day by day on Facebook, Instagram, Twitter and TikTok lookout for “GSH Electrical”. #GSHElectrical #Electricaltrainingvideos #supply #cables #switch #electrical #apprentice #apprenticeelectrician #electricians #sparks #consumerunit | GSH Ele