> When I 'undergrounded' my street feed I was advised to bury the cable > directly in the ground for the cooling effect of the earth. If I had used a > conduit then I would have had to use the next larger wire size. The price > difference was significant to me at least. I imagine for 3-phase the > difference will be even greater.
Interesting point. Talk to your sparky. I doubt you're allowed to bury the usual cables straight, you probably need tougher stuff rated for underground. But the extra plastic may be way cheaper than the extra copper these days. Volker -- Volker Kuhlmann is list0570 with the domain in header http://volker.dnsalias.net/ Please do not CC list postings to me.
