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S

sprottp

Gents,

Looking at an install which will include two new circuits, one for lights and another for a ring main. There is no space on existing 16th edition board and customer does not want a new 17th edition board, there is no double pole isolator before it.I am planning on Henley blocking the supply and taking a live and neutral to a new RCD 2 way unit. What's puzzling me is... As there is a requirement to have a main switch for isolation rather than using an RCD main switch as the isolator, would I install a double pole isolator external to the rcd unit to meet regs? Already explored ideas of RCBOs with a standard main switch 2 way unit but clients costs are the issue. Thanks
 
If your being forced to cut corners to keep costs down then it's time to walk away imho. I must admit not being allowed to use a RCD main switch as a main switch is new news to me. I guess you never stop learning :)
 
Why do you want a main switch for isolation instead of using the RCD in the board

There is possibly more argument for a single isolator for both installations, albeit not necessarilly required
 
RCDas main switch in your new board is fine, but fit a 100A D/P isolator before the henleys ( installation should have a single point of isolation ).
 
RCDas main switch in your new board is fine, but fit a 100A D/P isolator before the henleys ( installation should have a single point of isolation ).

I must admit I even thought two main switches was acceptable if very clearly marked that there was more than one main switch. Obviously avoid this at all costs in the first place.
 
I must admit I even thought two main switches was acceptable if very clearly marked that there was more than one main switch. Obviously avoid this at all costs in the first place.
you`v got to look at it as an installation intended to be used by unskilled/uninstructed person/s not under supervision n all that lot....
so a single point of isolation makes common sense...doesn`t it...
 
Oh yeah, totally agree. Only place I have ever seen it was in a Secondary school on a condition report done by someone else.

We accepted clearly laballing at each main switch that another main switch needed to be switched off for total isolation in a nice tref label. I would never install anything this way to boot. I definitely wouldn't do it in a domestic property.
 
you`v got to look at it as an installation intended to be used by unskilled/uninstructed person/s not under supervision n all that lot....
so a single point of isolation makes common sense...doesn`t it...


what a waste of words when a simple "muppet" would do
 

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