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Lockable cabinet? Regards

Do you know whether these leads have in-built filters? Regards

Why cannot this be due to simple mechanical movement of previously separated cables/ terminals, when operating the switch to the off position, moving a line cable/terminal to touch and earthed part? For example, badly sheathed CPC at DP switch. Regards

That's interesting Prentice - please explain how that works? Regards

Test if concerned with a suitable meter. These will not be connected to the mains but always best to make sure. Then test for continuity between the wires in the picture and door bell push position. Otherwise, cut wires, one at a time (to avoid possible short of battery - if these still hold...

Well done John for working out that I was referring to the photographs of the switch plates. Just wondered whether these were intermediates as that may explain the difficulty the OP is having. Regards

Are those intermediate switches?

Hello Steverog, You sound as though you pretty much know what you are doing. Just a check though - installation sounds quite large - what is the incoming fuse size and what is your maximum demand? That is, have you got two cookers, an induction hob, three showers, garden pool etc etc. Not...

I take it that the reason for the first of my later posts has now become self evident? 'The purpose of protective bonding is to equalise potential rather than to carry fault current, although sometimes bonding conductors will also carry fault current where they form part of a parallel earth...

22K between ExtCP and MET (to be measured). 1K assumed for body resistance. Regsrds

Just to add at a tangent to this topic. In determining what needs to be bonded, you need to work out whether a given part comes under the definition 'extraneous conductive part'. Generally accepted advice (and which would probably suffice for a domestic installation) is that a resistance...

Looks like 6mm² twin and earth. Brown=line, blue=neutral and single strand copper = Circuit Protective Conductor (Earth to you) which should be over sleeved in green and yellow sleeving. Regards

I thought it was becoming de rigueur to install panels with micro inverters? Regards

John, Have done some more research on this (what follows is my version of a printed text as I do not wish to get into Copyright issues):- Plotting the maximum fault current line (using the adiabatic equation) on the OPD characteristic curve would seem to be the way to determine visually...

That is a great shame Bernard, as we are now left in the position of having to rely on data from modern products which show far better characteristics than you describe. Regards

Thank you Bernard - that is interesting. Could you please forward the manufacturer's name and type number for these panels - I'd be very interested to see the data. Would also like to understand the power output of the installation and type of inverter ect so that we can make a proper...

Bernard, There is no problem in selling a house where the house owner retains title to the FIT's - it only becomes a problem when solar panels are installed with the right to the FITs signed over to the installer. For that reason, do not sign up for that option. 'Seems like.....' is not...

Looks like the rest of this thread has been tonsured. I have no commercial interest in Solar PV and do not install these. I have, however, looked into putting these on my own roof and looked into becoming an installer. You could argue that we pay an enormous amount for hospital treatment of...

I know of five - and, in common with the last poster, three of which use SolarEdge technology. Heating of HW during the day using the generated power to feed the electric immersion heater minimises boiler demand. They are pleased with the returns. They have studied, taken the risk and invested...

Me too John and I don't think the subject is exhausted yet! I think that the silence from the majority is possibly an indicator of how well (or not) this subject is understood abroad. Regards