I have the "increased supply" (16kVA) from ESB Networks and they have confirmed to me that the fuse on the ESB side of the meter is an 80A fuse. I believe the standard fuse is a 60A fuse (12kVA supply).
The main fuse on the distribution boards is rated 63A
I have a few electric hungry devices, the two main ones being:
- Heat Pump
- Electric Car
The heat pump runs at 22.5A (it takes more starting current but it has a soft starter) and the car runs at 32A and they run daily at the same time (during night rate electricity). The car, in particular, draws a constant 32A for several hours every day. The heat pump cuts in/out as it sees fit so its "on time" is variable but they do run at the same time at least once a day.
Add in a few other devices and I am close to the main distribution board fuse which is, by default, 63A is every house.
So, my question, to all those RECI certified electricians out there is what is allowed, from a domestic regulation perspective, to "unlock" the extra 17A between 63A(on the board) and 80A(in the meter box)?
Example: Can I simply take the 40A C-Type RCBO on the distribution board that controls the car charger and wire it outside the main 63A fuse on the board? i.e. connect it direct to the supply coming into the distribution board or do I have to wire a second distribution board or what other options are there?
Note: I dont want to go down the route of priority switches. I want to utilise the 80A. I paid for it so I want to use it.
I am obviously not planning on doing this myself. I will be getting a certified electrician to do it but I want to hear what my options are before I get someone out.
The house was built in 2011 and the tails were upgraded to allow for the increased supply so I should be able to draw the 80A without burning the house down!