Good morning,Dave...
I sense your furry...(an extra "r" to cheer you up
)
I think a lot of lads,lack more in confidence,in these areas,than acumen,and either over-think things,or don't feel like getting deeper.
Your comment about asking a competent electrician,to explain things,made me remember a chat i had some time ago,with a "specialist CH" spark,me mate had involved,on a project.
My pal is a very capable boiler engineer and agent,for a large manufacturer,and had employed a highly recommended CH spark,to install all the new gear,in addition to incorporating some of the old.
A brief conversation with him,revealed a quick and detailed explanation of what goes where,including connections paths (wet) and wiring colours and nomenclature. He knew what valve/controller/systems were compatible,and what was the difference between the various qualities of equipment.
In short,an apparent professional.
When asked about the actual electrical function of,say,a 3 port valve,he didn't have a clue.
He knew WHY it worked,but not HOW. Further questions proved similar,and i could see i was testing his patience...so i apologised,and explained i was only seeking to work out how his fault-finding proceeded,if such knowledge was lacking.
His reply was "I've got 3 months work ahead of me,so why worry..."
The only reason for this long-winded digression,is i think quite a few lads fall into this category,where they may be mustard at their job,highly rated and worked-up...but could not honestly post on here,that they knew the electrical principles,going on in say a 3 port,and therefore run the risk of getting the back ripped off em'.
That said,a great many of Daves opinions,are shared by myself...fear and etiquette,maintaining my silence! :rockon2: