Power to a trailer?

[ColJack]

One thing I thought of - ColJack's idea of a channel to the trailers, but at the trailers, dig out a manhole about a foot deep and fit a socket in there. You'd need some form of drainage and cable access though.

I already said that...

another option would be something similar to what they have at airports for the planes.. a hook up in the ground.. but then you're talking silly money..

http://www.airport-technology.com/contractors/groundequipment/combi_box/combi_box1.html

granted this is a stand hookup for an airplane but same idea...

 

[333rocky333]

try a drive round some of the large supermarkets and see if you can see what their set up in in the loading bays.. they often have extra fridge trucks around x-mas times.

The larger Tescos have 5pin 32 amp red w/proof isolater/sockets permenently wired in swa, mounted all year round on the walls.
Some are Rcd supplied at the source, but the trailers are linked to the store monitoring, so a power loss would trigger an alarm signal.
The rented trailer lorry comes at xmas complete with a 5 core rubber type flex about 6mm cores, with Male and female ends on.