Description N.B. This low voltage ladder should only be installed when absolutely necessary, either at the entrance to a shower when the electrician has already installed a low voltage cable; or refuses to accept the IP rating. Due to the configuration of the dry element within the rail, one of the vertical rails does not heat. The transformer necessary for the installation of this low-voltage rail is included in the price. This also comes with a 3m 12v cable and no plug.