Or just extend the cables from the old heating board directly to a spare way in the live board and fit an appropriate size fuse.
Repurpose storage heater circuit?
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They were still being made into the 1970's.
What is reccomended these days for a modern CU. I read in the past that these days it is suggested that RCBOs be used for all the breakers in a CU? Rather then just one for a group? Have I got this correct. It is a few years since I read up on it so am a bit rusty on things.
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All RCBOs is best, though expensive.
The cheaper way is two RCDs each controlling some of the MCBs.
The cheaper way is two RCDs each controlling some of the MCBs.
Thanks for the pics
Yes replacing the whole lot with a modern CU would be a step forward.
or if you wanted to bodge it, you could connect a cable from the old cu (from a red fuse, or empty blue fuse) to the white CU's main terminals.
If you use the red fuse, make sure the cable linking the two boards is 4mm2 or larger.
If you use the blue fuse use 2.5mm2 or larger.
I'm surprised they haven't made another re-introduction with amendment 3, would be a good way to comply with 521.11.201 for the times where you only have a few cables and it's not worth using basket/tray
As I said, I still quite often use them and, although I haven't tried for quite a long time, I've never had trouble finding sources when I've needed them.
Kind Regards, John
Where are you getting them, I've run out of the 2 smallest sizes? I've got loads of the bigger ones.
As I said, it's quite a long time since I've needed to buy any, but I've never previously had trouble finding a source (e.g. by Googling, or even on eBay). However, when I try that tonight, most of the earliest hits are for ones with rather annoying 'cross pieces' with self-adhesive pads - so (although I haven't yet looked very hard!) maybe the 'proper old-fashioned' ones are getting harder to find. Fortunately, I have quite good stocks
Kind Regards, John
I have not got a copy of the latest Amendment 3 of BS7671 so could you please clarify and explain what this "521.11.201" regulation is. I guess it something to do with non combustible materials, otherwise what's wrong with modern plastic cable clips.
AIUI, what is apparently 'wrong' with them is that, in the case of fires, plastic clips can melt and allow cables to fall, apparently hanging or electrocuting fire-fighters (and maybe also occupants).
Kind Regards, John
I thought it would be something like that. i.e. To do with the new focus on non combustible materials.
Yup. There's plenty of ways around it for multiple cables - basket, tray, trunking - either metal or pvc with metal retainers in it. But as far as I'm aware, very little in the way of clips for one or two runs of T+E
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