The critical question is the size of the unit. If it is an over width (>8') or over length (>40') unit or it is more than 320 square feet then it is a manufactured home rather than a mobile home. In other words anything larger than a single wide forty footer is not a mobile home. If it is a manufactured home then the service lateral can be run directly to the home under the provisions of section 550.32 (B) of the US NEC.
"550.32 Service Equipment.
(B) Manufactured Home Service Equipment. The manufactured home service equipment shall be permitted to be installed in or on a manufactured home, provided that all of the following conditions are met:
(1) The manufacturer shall include in its written installation instructions information indicating that the home shall be secured in place by an anchoring system or installed on and secured to a permanent foundation.
(2) The installation of the service equipment shall comply with Article 230.
(3) Means shall be provided for the connection of a grounding electrode conductor to the service equipment and routing it outside the structure.
(4) Bonding and grounding of the service shall be in accordance with Article 250.
(5) The manufacturer shall include in its written installation instructions one method of grounding the service equipment at the installation site. The instructions shall clearly state that other methods of grounding are found in Article 250.
(6) The minimum size grounding electrode conductor shall be specified in the instructions.
(7) A red warning label shall be mounted on or adjacent to the service equipment. The label shall state the following:
WARNING DO NOT PROVIDE ELECTRICAL POWER UNTIL THE GROUNDING ELECTRODE(S) IS INSTALLED AND CONNECTED (SEE INSTALLATION INSTRUCTIONS).
Where the service equipment is not installed in or on the unit, the installation shall comply with the other provisions of this section." Copyright 2002 the National Fire Protection Association.
You may have gotten yourself in a needles bind by referring to a larger unit as a mobile home. Call up the poco engineers and explain the situation so that they will back off the changes or the other local sparkies will be calling you everything they can think of except maybe a nice guy.
--
Tom H
[This message has been edited by tdhorne (edited 12-03-2004).]
