timnewbold
- Jun 8, 2013
- 1
- Joined
- Jun 8, 2013
- Messages
- 1
can anyone help me? i have spoken to 2 or 3 engineers and they all have a different story. i am looking to put in a buried low voltage supply to my house 450m away from the supply which is 15kw 230v. it would be i presume a SWA cable buried in sand in the trench. it doesn't have to conform to regulations so i can have a larger voltage drop and could possibly even cope with the odd flickering light to try to keep the cable size down. no big motors but i will have a few high kw water heaters. the other issue is the PE and earth loop impedance. i can put large earth stakes down at the property but in the future if anyone dug up the cable? the last guy who looked at this said 70mm SWA 2 core using the casing as an earth. he has now up it to 70mm 4core and now to 5 core using one of the cores as an earth so i have lost faith ! thank tim