I'm looking at running leccy out to my garage and would like some advice/input before I go as far as consulting/hiring a sparky.
Plan is;
-Main feed from a new breaker in existing consumer unit.
-Punch a hole in the external house wall above the consumer unit and feed cable outside.
-Run the cable along the external house wall (approx 8ft up) and across a 4ft gap to the garage.
-Punch through the garage wall and feed the cable into a garage consumer unit with RCD.
-Wire up lights, sockets etc in garage.
In my mind I've got a couple of issues I'm struggling to resolve.
-Protecting the external cable? Can I use T&E in conduit? Armoured cable? Armoured cable in conduit? Metal or plastic conduit.
-Height for the overhead cable?
According to Regulation 412-05-01
4.1 . Regulations 17(2) Minimum height for Overhead Lines generally .
According to regulation 17(2) and Schedule 2, the minimum heights for lines used or intended for use at 33 kV or below (which includes low voltage lines) are:
(i) 5.8 m over roads accessible to vehicular traffic, and
(ii) 5.2 m at any other point.
( Minimum height of Overhead Lines up to 33 kV )
The way I read that, is that as long as the cable is insulated and mechanically protected (and not over a road) the height requirements don't apply.4.2. Regulation 17(3) Exemptions from Regulation 17(2)
Regulation 17(3) indicates that the following three types of overhead line equipment need not comply with regulation 17(2), provided the equipment is not installed over a road:
(i) Overhead lines which are fully insulated (that is, insulated for the full working voltage and, where necessary, sheathed to afford mechanical protection)
(ii) Exposed conductors connecting an overhead line with equipment that is fixed to an overhead line support (such as a pole mounted transformer , provided the conductors are at least 4.3 m above the ground
(iii) Lines which are connected with earth (such as earth wires, or neutral conductors on low voltage networks)
Any thoughts/help would be much appreciated.