I have a client, who is renovating his house, so as to move in from a rental, and wants some electric jobs (I am an electrician). One of them, is changing the main feed from the electricity meter to the main distribution panel. The old one is probably from the '60s, and is only 6mm^2 (#12aprox) with an allowed amperage of 25 A @ 230 V. I want to install 10 mm^2 (#10) or
35 A max amp. It's gonna be a three-conductor cable, also 3 X 10 mm^2 (live, neutral, earth). Ther problem is, the front side of the house is paved with stone tiles, and I want to be extremely careful when drilling the hole for the cable. I'm gonna use a plain pneumatic drill (1000 W), it goes without saying I'll start with a small bit (5 mm) and gradually change them, until I will use my largest (22 mm). Is there anything I must take care of, so as not to crack the stone? TIA,- posted
13 years ago