I've seen pictures of PVC conduit bending springs and read articles about using them but these articles were from the late 50s when non-metallic conduit was new and all the rage. That old conduit (yellow or dark grey) had much thinner walls than the current stuff so I'm not quite sure how well you could bend modern conduit - I'd definitely give it a try if I could round up an affordable bending spring but I haven't seen one yet.
These days no one bends conduit any more. That's what you'd typically find in any cellar, garage or storage room:
http://catalog.obo-bettermann.com/c.../images/content/de-de/Wohnungsbau_14.jpgBack in the old days they used clips like these and fastened exposed cables to the wall but that requires clips every 20-30 cm and getting it neat isn't that easy.
http://www.produktgesellschaft.de/neuigkeiten/ip44_2.jpgThe picture is a replica, clips are something like 1 Euro each and the switches are close to 100 Euros each I think. A regular IP 44 switch is less than 20 Euros, a cheap one at the DIY store probably only 4.99.
