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Andy, thank you for your post which is a constructive post not like some others where they are just negatively qualifying my incompetence which is fair enough as I am a starter but they are not helping me to understand what I am missing on. So because I am new in the trade I don't express...

So what probe should be touching the boiler L terminal? Are we well checking for polarity here? And do you know how to perform earth impedance on boiler? what is the procedure? As said I am building my gas portfolio through short track course and also new in the trade so even the basic are not...

Thanks for the reply... So what is the pen, and the socket and see for when checking safe electrical isolation before servicing a boiler?

Hi all, Just spent a week placement with British Gas. Part of the boiler service is to complete a Dynamic Assessment Checklist, and so, first perform a safe electrical isolation check. Now this involves 2 tasks: 1st using an electric pen voltage tester over the boiler and 2nd using a socket and...