Metal cable supports. Two firefighters died when trapped by fallen cables and in the Rule 43 letter issued under the Coroner’s Rules it was recommend and became a regulation.
Stranded cable should not be tightened under a screw, it damages the strands. The ferrule keeps the strands together and then the screw tightens onto the ferrule which stops the strands splaying, breaking or twisting.
Correct. My mistake, well spotted. I think I was getting to direction and went off at a tangent. With conduit we take the earth from the backbox with T&E we take an earth to it.
As stated previously this method is perfectly acceptable, I’ve worked on a couple (in bungalows for some reason). Be mindful that in my cases the conduit was joined in many places (no bends), these screwed connections and conduit buried in the wall can become loose or corrode quite badly -...
This is a great post and useful stuff in what is becoming a dying art. It is coming back as things often do. Appreciate the original diagrams too what a find.
Fantastic answer! Thanks @davesparks - I’m going to be looking at this moving forward. What I didn’t get was how WE can change the installation to PME, surely that needs to go through the DNO.
I think you have a point. The issue with PME is the open circuit PEN conductor - hence the requirement for a rod for PV, outbuilding, shed. So if someone gets fried it’s our responsibility not the DNO, why? Smart meters can shed the load by switching off the supply (volatile renewables?) like I...
Good point! Nokia now there is a company, a market leader that rested on their laurels and didn’t see what was coming. Bought by Microsoft - shame. The rest is history now. Never really liked snake. My favourite was the Sony Erickson razr flip phone, brilliant piece of kit until it fell out my...
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