|
|
|
Had all the electrics tested and signed off as part of our insurance policy so whilst it is old it all works, trips out when it is supposed too etc. Never take any advice from people that actually do the job the wrong way! I'm afraid thats a common misconception with electrical testing, all they will do is test the cabling and check that in theory if the MCB is working correctly it will trip. They don't have any way of checking whether an MCB still works and in some instances I have seen older ones don't work correctly/at all under fault and the next device along has to pick up the fault with potentially disasterous consequences.
Electrical testing will check the correct operation of RCD's however, you don't have any on the board pictured and even if you did they offer improved safety to people but won't disconnect in the event of a fault or overload.
You need to get that old C50 board changed, if it no longer serves the house what are all the outgoing ways doing? Are they now all spare?
|
|
|
|
|
|
|
if you are confident the board is tested etc and all good then take a 3 phase supply for your house to the garage, if no spare ways then take a 100A feed from the main incomer (use a JB and then you need to run same size cable as the incomer to the new garage DB. I wouldnt go the inverter route when you have 3ph there, it seems madness. I wish I had a 3ph supply I wouldn't advise the above, you shouldn't be relying upon the electricity boards fuses to protect your cabling of any significant length, its ok for the tails from the cutout to the meter to the fuse board in the same location but if you need to install cabling to a remote location you should put protection (fuses, MCB or MCCB) on the supply end of the cable as the electricity board fuses arn't really intended to protect your system and tend to have very course grading so they only blow as a last resort (the electricity board don't want to be out changing them every 5 minutes).
If you have another three phase board feeding the house I would suggest that you replace the old C50 board with a new three phase board, refeed the board in the house from this and then install a new three phase sub-main from this out to the garage.
You really should ensure that you have RCD protection on the house already and the garage will definately need it.
Be very careful with what you do as electrical systems tend to work even when they are dangerous.
|
|
|
|