Complicated, probably not.
Cost, impossible to calculate remotely. You need a registered electrician who is experienced in TT systems.
NOTE that changing from the current supply type to TT will have implications on the installations in the 6 flats and common area.
We’re recent EICRs...
If you double the current on one side of the circuit you MUST double the other side as well. If you don’t increase the neutral then it will melt when the increased (double) load goes through it.
Not sure why you need to increase your cable size. Is it a bigger load, or is it to reduce volt...
Ok, but don’t forget that if you double the conductors to the breaker (to allow for larger current?)
Then you have to double the conductors on the neutral as well.
The current on the neutral will be the same as on the live.
Again, it isn’t easy. Take the example of a supply cable that has an earthed outer and two internal conductors (L&N). Typically used on TN-S supplies. The outer of the cable may be further wrapped perhaps with fabric, perhaps with all sorts of other covering (plastic, pitch, all sorts). The...
Cable size may not be the only consideration, other loads on the phase may limit the max current available. Also, if you have a linked supply you will not be permitted to add more large load (eg EV charging) without the supply cabling being upgraded.
Also there are several types of cable, some...
No distances are specified, only that the installation must be environmentally suitable. So if the area is going to get HOT then you need to apply the relavent allowances when you do your cable calculations.
Remove the MCB and fit a Hager blank.
https://www.edwardes.co.uk/products/hager-jk01b-single-module-blank?gclid=CjwKCAiAsYyRBhACEiwAkJFKopEHGj4P4NcyekaDHJvuqAYhr14-vSypAam_ttiavkGS8OED46al2RoCjToQAvD_BwE
I have bought grid plate dimmer switches that come with a ring tool for that job. Lord knows where I’ve put them though!
Edit. Varilight sell a dimmer plate that includes the tool!
CLICK BAIT
The meter cupboard was probably installed and supplied by the builder. Unless the back box actually is labelled something like “Board’s equipment only” then I’d go ahead and put your protection unit in the the meter cupboard.
The whole of the UK is going to have to face this issue in the coming...
The 40A is thd maximum current that the RCD contacts have been tested to handle reliably. If you put 50amps through it then the contacts could burn out or (worse) weld together. Then the supply will not cut should an earth fault trips the RCD.
The circuit needs current limiting at the source...
And cable not supported, nor properly glanded, armour not earthed. Single insulated conductors not in an enclosure…
So many sins in one photo. Love to see the other end of the SWA.
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